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Nen Type: Conjuration

The user can stretch or compress any part of their limbs or torso, provided the affected body part is completely covered by clothing.

Stretching and compression ignore ordinary human anatomy. Bones, joints, muscles and other internal structures deform together without injury.

The user retains normal sensation and voluntary control over altered body parts.

Compression can reduce the user's torso and limbs to extreme proportions, leaving little more than their head, hands and feet visibly protruding.

While stretching technically has no upper limit, extensively greater stretch distances require exponentially greater aura expenditure.

Follow Through – Rubber-Hose Motion

Length and flexibility are independently adjustable properties.

The user can make an affected body part unnaturally flexible without substantially changing its length, or stretch it while keeping it relatively rigid.

At maximum flexibility, affected limbs behave like classic rubber-hose animation: bending, curling, looping and moving without regard for normal joints.

Greater length, flexibility and more complicated simultaneous deformation require progressively greater aura control.

Appeal – In Technicolor

Whenever the user's body stretches, the clothing covering it expands alongside it, generating additional fabric as necessary.

The generated material matches the fabric, construction and overall visual character of the clothing already covering that body part.

Simple clothing consequently produces simple extensions: a white shirt produces additional white shirt fabric.

Elaborate patterned and multicolor costumes may produce changing colors, stripes, checks, polka dots and other patterns consistent with the costume's existing aesthetic.

Hammerspace – Up My Sleeve

Objects completely contained inside the user's clothing become subject to Squash & Stretch alongside the body part containing them.

When the limb is compressed, contained objects are proportionally compressed with it.

When the limb stretches again, the objects return toward their corresponding dimensions.

Their altered dimensions do not prevent the limb from using Follow Through; even normally rigid objects can consequently be carried inside a flexible, compressed limb.

An object must remain completely enclosed by the affected clothing to remain compressed. Removing it restores its normal dimensions.

Limitations and Conditions

Bare body parts cannot be stretched, compressed or given rubber-hose flexibility.

If an affected area becomes sufficiently exposed, that portion can no longer sustain the deformation and will return to its normal size.

Stretching consumes increasingly more aura with distance and has a practical maximum range.

Squash & Stretch alters dimensions rather than eliminating mass. The user’s limbs and objects stored with “Up My Sleeve” retain their original mass.

Squash & Stretch only works linearly. The user can only alter the length of the body part, not its thickness or width.

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A little preamble

This is a very boring Hatsu. It's not a flashy "My punch destroys mountains" of Gon and Uvogin. Not a conditional "Wind my fist to punch harder" of Phinks. This is essentially the hatsu of someone like Saitama. 100 pushups, 100 situps, 100 squats, 10 km run, every single day... Become strong.

I think it's a good exploration into Enhancement because most of the time what comes to mind is an immediate effect. An immediate boost for a given cost. This is more of a bodybuilder Hatsu. An eventual result as a consequence of, well, an iron regimen.

Hatsu: Iron Regimen

Nen Type: Enhancement

Iron Regimen is not the Hatsu's formal name. When asked about it, the user simply explains that he “follows an iron regimen.”

The Hatsu enhances the long-term benefits the user receives from disciplined physical and Nen training.

Rather than producing a temporary increase in strength or aura boost upon activation, the ability rewards consistent adherence to a comprehensive personal regimen.

The regimen consists of numerous individually mundane requirements concerning:

• Strength and conditioning exercises
• Cardiovascular training
• Flexibility and mobility
• Nen training
• Diet and hydration
• Sleep
• Rest and recovery
• Personal hygiene and health
• Regularity of daily routine

Each individual requirement provides only a negligible benefit. Their effectiveness comes from fulfilling many conditions simultaneously and maintaining them consistently over long periods.

The resulting Enhancement primarily improves the user's physical development, recovery, conditioning and efficiency of ordinary Enhancement. Consequently, the user's strength is not a temporary transformation: his normal physical condition is the product of the Hatsu.

Steeled Consistency

The Hatsu rewards consistency rather than intensity.

Performing additional training does not compensate for previously neglected requirements.

Excessive exercise may violate the regimen if it interferes with scheduled recovery, nutrition or sleep.

Maintaining the regimen continuously causes its cumulative benefits to gradually increase. Days, weeks, months and years of uninterrupted discipline produce increasingly substantial results.

Missing individual requirements causes relatively minor losses. Habitually neglecting or abandoning the regimen gradually erodes its accumulated benefits.

Legitimate adjustments do not necessarily constitute violations. Injury, illness, travel, work and other circumstances may require the regimen to be modified, provided the user deliberately establishes an appropriate replacement schedule and follows it.

Ironclad Routine

The user's regimen is deliberately extensive but otherwise remarkably ordinary. A typical day may include:

• Waking and sleeping at predetermined times.
• Morning stretching and mobility exercises.
• Running and cardiovascular conditioning.
• Calisthenics and resistance training.
• Grip, balance and strongman exercises.
• Ten, Ren, Ken, Ryu and other Nen exercises.
• Meals of predetermined nutritional composition and portions.
• Scheduled hydration.
• Rehearsal and professional duties.
• Mandatory periods of rest and recovery.

The exact regimen changes according to the user's circumstances and physical needs. Following the plan is more important than any particular exercise contained within it.

Limitations and Conditions

The Hatsu cannot simply be activated to grant the user additional strength. Its benefits must be accumulated through training and discipline.

Extraordinary effort over a short period cannot substitute for long-term consistency.

The greatest benefits require months or years of continuous adherence. Neglecting the regimen gradually diminishes accumulated benefits.

Rest, sleep and proper nutrition are conditions rather than optional conveniences. Ignoring them for additional training is counterproductive.

Practical Effect

Long-term adherence to the regimen dramatically develops the user's total aura reserves, allowing them to sustain enormous aura output and prolonged Nen use without exhaustion.

The user's Enhancement is extraordinarily efficient, converting aura into physical reinforcement with very little waste. Even ordinary Ten, Ken, Ryu and Shu consequently produce exceptional results.

Even with basic Ten, the user gains tremendous strength, toughness, durability and stamina, allowing them to perform extreme feats of strength and withstand punishment that would overwhelm most Nen users.

Enhancement greatly accelerates natural recovery from fatigue, exertion and injury, allowing the user to tolerate extremely demanding workloads and recover considerably faster than normal.

Iron Regimen has no activation state or temporary power-up. Provided the user continues adhering to the regimen, these capabilities constitute their normal physical and Nen condition.

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Nen Type: Transmuation, Emission

Chim Chiminey allows the user to transmute their aura into extremely fine particulate resembling either white ash or black soot. The transmuted aura remains light and smoke-like, allowing it to disperse through the air and be gathered and shaped through aura control.

• Chim Chim Cher-ee – Ash: White/grey ash aura. Reflects and diffusely scatters physical light.
• Chim Chim Cher-oo – Soot: Black soot aura. Strongly absorbs physical light.

Despite being transmuted aura, the particulate possesses the optical properties of real ash and soot, physically interacting with ambient light. Consequently, its visual effects can be perceived even by non-Nen users.

Winds in the east, there's a mist comin' in

The user freely disperses, gathers and shapes their Ash and Soot while maintaining control over it.

The particulate may be spread into clouds, drawn into streams, concentrated around objects or arranged into simple shapes. It possesses little physical substance and is primarily useful for concealment, misdirection and theatrical effects.

Somethin' is brewin' and 'bout to begin

The user shapes Ash and Soot into specific recognizable forms, such as objects, symbols, silhouettes or simple figures.

The resulting forms remain composed entirely of particulate aura and possess little physical substance. Their apparent coloration and detail are produced through different concentrations and combinations of light-reflecting Ash and light-absorbing Soot.

I draws what I likes and I likes what I drew

The user creates detailed three-dimensional images of people, animals, objects or scenery.

By carefully arranging Ash and Soot at different densities, the user can reproduce highlights, shadows, surface patterns and recognizable features, effectively creating monochromatic illusions.

The images are not physically transformed into the things they depict and become increasingly obvious as illusions under close inspection or physical interaction.

A screever's an artist of highest degree

The user continuously reshapes a three-dimensional image to create the appearance of natural movement.

This allows figures to walk, gesture, fight or otherwise act, and allows animals to run, fly or behave like their real counterparts.

The figures possess no autonomy. Every movement must be actively produced by the user, making convincing animation dependent upon concentration, aura control and familiarity with the subject's appearance and movement.

Limitations and Conditions

• Ash and Soot possess little physical force and cannot normally function as solid constructs.
• Greater volume, distance, detail and movement require progressively greater aura and concentration.
• Fine control deteriorates with distance from the user and requires greater use of Emission.
• The images are inherently black-and-white. By carefully combining ash and soot, grayscale can be achieved, but this requires a much higher degree of control and concentration.
• The images reproduce only visual information; they do not inherently reproduce sound, or any physical properties, being essentially smoke illusions.
• While the particulate cannot be dispersed by ordinary wind, sufficient physical force from solid objects disperses it, while even moderate offensive aura completely disintegrates it.

Uses

• Obscuration – Create clouds of Ash or Soot to obscure vision and conceal actions.
• Misdirection – Draw attention toward false movement, figures or objects while concealing the actual action.
• Appearances/Disappearances – Conceal the introduction, removal or substitution of people, animals and objects.
• Disguises – Overlay the user or others with Ash and Soot to alter their apparent features, clothing or silhouette.
• Decoys – Create false copies of the user, allies, enemies or other recognizable figures.
• False Movement – Produce fleeting figures running, approaching, retreating or moving through peripheral vision.
• Camouflage – Modify visible outlines and coloration to make someone difficult to distinguish from their surroundings.
• False Scenery – Create apparent walls, openings, obstacles, shadows or environmental details.

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I've had this arise in two of the Hatsus I created. The Glass Eyes, and Cloud Nine

The basic premise is this: If a Transmuter Nen user transmutes their aura into a substance that explicitly interacts with light, does that make it visible to non-Nen users?

Glass refracts and reflects light. So transmuting that property of glass would similarly make it do so. The non-user doesn't see the glass aura, but they do see the effect of the light being refracted. Some kind of nondescript sheen, glimmer or the like.

Clouds and fog block light. So transmuting that property of clouds/fog would similarly block light. The non-user doesn't see the cloud aura, but they do see some nondescript haze obscuring light.

If such interaction with light is intentionally and explicitly transmuted as part of the Hatsu, light wouldn't take two different paths - one as if there's no interaction, to remain invisible to non-users, and one as if there is to be seen by Nen users.

So I think it logically follows that any Transmutation Hatsu that explicitly interacts with light, would allow non-Nen users to see if not the aura itself, but its effect at the very least.

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Nen Type: Conjuration, >!Post-Mortem Nen!<

The Hatsu’s mechanics work through a conjured White Rabbit, which matches closely to real rabbits on the outside. This includes appearance, behavior and all other properties of rabbits. The rabbit can even eat real food, though that doesn’t nourish it.

The Rabbit is always conjured. It cannot be dispelled or dismissed. Even if attacked by Nen, it vanishes rather than being destroyed.

The Rabbit’s Burrows - Curiouser and curiouser!

The Rabbit can establish spatial destinations – or Burrows.

To establish a Burrow, the Rabbit must physically enter an enclosed space, opening, gap, hole, or similar location capable of concealing its entire body from outside observation.

• The Burrow must be capable of fitting the Rabbit comfortably (allowing it to move relatively freely within it) but must not be more than double the Rabbit’s width (roughly 50 cm)
• To Burrow, at least one living observer must exist. Cameras and other means of direct observation only count if there is a living observer currently viewing the feed.
• The Burrow doesn’t need to be completely enclosed on all sides. So long as the rabbit is obscured from all observers, the Burrow is valid.

Once the Rabbit has successfully "burrowed" into such a location, it remembers that location as a valid destination for The Rabbit Hole.

Burrows remain valid even if they are moved or opened. However, if the Burrow is destroyed or otherwise rendered completely incapable of ever fully concealing the rabbit, it becomes invalidated.

The Rabbit Hole – Down, down, down

When hidden completely inside a Burrow and disappears from direct observation, the Rabbit can teleport to any other valid Burrow within a roughly 50m range.

• A Burrow is only valid if, emerging from it, there exists at least one observer, but the rabbit remains fully obscured from direct observation.
• Likewise, the Rabbit cannot activate the Rabbit Hole while being directly observed.

Follow the Rabbit – How long is forever?

The Rabbit may transport another living creature through The Rabbit Hole.

To do so, the passenger must be in direct physical contact with the Rabbit at the instant the teleportation occurs, but must not be able to see the Rabbit during the transition.

• Closing one's eyes, being blindfolded, being in complete darkness, or otherwise losing visual perception of the Rabbit satisfies this condition.

The passenger does not need to physically fit through the opening used by the Rabbit.

• Instead, once the Rabbit crosses the threshold, the passenger is pulled into the transitional Nen Space, as if being shrunk in the process, and emerges with it from the destination Burrow.

Inside the Rabbit Hole – We’re all mad here

The Rabbit Hole is not instantaneous. The entrance and destination are connected through a small Conjured Nen Space through which the Rabbit passes.

This Nen Space can be very short, which results in a near-instantaneous teleportation, or much longer.

Internally, the Nen Space appears to be a non-descript mass of tunnels, branching and weaving. The walls of the tunnels seem to consist of cloth and wood, however there is no light inside. The interior does not correspond normally to physical distance or geometry.

When travelling with a passenger, the Rabbit must fully enter this Nen Space with the passenger before it is able to emerge from another Burrow.

If attacked by Nen with a sufficient force, the Rabbit vanishes spontaneously, reappearing inside the Nen space, and can emerge from a nearby Burrow.

Lost in the Rabbit Hole - Simply Impassible!

A passenger who loses physical contact with the Rabbit while traversing the Nen Space remains stuck there.

Ordinary physical direction and distance have little meaning inside the space, making attempts to escape without the Rabbit extremely unreliable. They may stumble onto a passage that leads out through a Burrow… or they may end up in an endless, contained loop. The Rabbit may potentially return and retrieve them.

The Ultimate Escape - Who in the world am I?

If the User of this Hatsu dies while in contact with the Rabbit, the post-Mortem ability takes effect.

All of the user’s Aura is transferred to the Rabbit, allowing it to persist even after the user’s death.

Additionally, the user’s consciousness is transferred into the Rabbit. However, there is no guarantee the consciousness will remain intact, that continuity of self and memories will be preserved. In an unfortunate case (and current case), the Rabbit may gain a personality, intelligence that is higher than an average Rabbits – but no human memories or sense of self.

The Rabbit can sustain itself on eating food, however to sustain its ability it needs a willing host.

• By establishing a bond with a willing host, one that cares about the Rabbit, the host can provide the aura necessary to maintain both the Rabbit's manifested existence and use of The Rabbit Hole.
• The Rabbit chooses whom it attaches itself to and may refuse to bond. Even if the Rabbit bonds with the host, the host does not directly control or command it, and the Rabbit may refuse to cooperate with its Host.

Nen Type: Manipulation, Emission

L'Aria di Gravità allows the user to establish artificial centers of attraction called Gravity Anchors, then introduce thrown objects into orbit around those Anchors.

Centro di gravità (Center of Gravity)

By touching an object (including living beings, and including oneself), and investing aura into it, the user designates that object as a Center of Gravity.

• The exact center coincides with the object's center of mass.
• The user can establish multiple such Centers.
• The user can make Centers stronger or weaker. Stronger centers require more aura investment, and longer contact.
• All Centers gradually lose the aura, becoming weaker. Larger objects, moving objects, and especially objects coated in foreign aura (including other Nen users) lose aura significantly faster.

Orbita del Satellite (Satellite Orbit)

Whenever the user throws an object, they can designate it a Satellite of a specific Center of Gravity. The assigned object experiences continuous acceleration toward its Anchor, while ignoring the physical force of gravity (but not other physical forces).

Its resulting trajectory depends upon the relationship between:

• initial velocity
• direction of release
• distance from the Center
• Center attraction strength
• object mass
• external forces

A properly thrown object can consequently enter a circular or elliptical orbit.

Other releases may instead produce partial arcs, highly eccentric ellipses, collisions with the Anchor, trajectories that swing around the Anchor before escaping, gradual orbital decay due to atmospheric drag.

La Danza dei Pianeti (The Dance of the Planets)

Centers of Gravity attached to objects or the user's body move together with whatever carries them.

Orbiting objects respond naturally to this displacement.

The Hatsu does not preserve their previous orbit relative to the Center. Instead, movement of the Anchor changes the forces acting upon the orbiting object and can consequently add or remove energy from its trajectory.

Moving an Anchor at carefully selected points in an object's orbit can: accelerate it, decelerate it, alter its eccentricity, shift its orbital orientation, cause it to collide with the Anchor or provide enough energy for it to escape.

Sudden or poorly timed Anchor movements can similarly destabilize an otherwise safe orbit.

Il Valzer Cosmico (The Cosmic Waltz)

An object carrying a Center of Gravity may itself be assigned to another Center of Gravity.

This means that one object that has something orbiting around it, may itself be sent orbiting around another.

There is no fixed limit on the theoretical depth of these systems, other than the aura investment and rate of aura loss.

Techniques:

Grave situazione (Grave Situation)

• The user deliberately establishes an unusually strong attraction between a projectile and a Center, producing a tight, violent trajectory.
• Rather than creating a comfortable stable orbit, the projectile passes dangerously close to its Center at high velocity, or simply hits it with a much higher velocity than if thrown normally.

Gravity Dance (Gravity Dance)

• The standard combat juggling technique. The user establishes their own body as a Center and maintains several weapons in simultaneous orbits around themselves.
• The resulting formation functions simultaneously as a juggling performance, defensive hazard and reserve of already-moving projectiles.
• The user may fight and move inside the system, although their movement perturbs every orbit centered upon them.

Assistenza alla gravità (Gravity Assist)

• The user deliberately exploits a moving Anchor to increase the energy of an orbiting object.
• By moving the Anchor in rhythm with the object's orbit, repeated small perturbations progressively increase its velocity - similar in principle to pumping a swing.
• The technique requires considerable timing and becomes progressively more dangerous as velocity increases.

Ciò che va, torna (What Goes Around Comes Around)

• The user throws an object into an extremely elongated elliptical orbit.
• The projectile travels far from the immediate engagement, potentially appearing to have missed or left the fight altogether, before eventually returning toward its Anchor at considerable velocity.

Limitations and Conditions

• The user does not possess telekinetic control over orbiting objects.
• Once an object is released, its assigned Center and attraction strength cannot be changed.
• The user cannot correct a bad trajectory through Manipulation.
• Each orbiting object can respond to only one Gravity Anchor.

Nen type: Transmutation, Conjuration

The user transmutes their aura into thin, flexible paper-like fragments. The fragments can be joined together into larger sheets, folded, wrapped around objects, or manipulated directly while connected to the user's aura.

折形 (orikata) - Folded Shape

When a transmuted Orishikigami sheet is pressed against a target, a localized planar Nen space is created, causing it to flatten into a paper-thin representation of itself. The target retains its identity, material composition and mass, but its three-dimensional structure becomes temporarily planar and foldable.

For an object to be successfully flattened, the total surface area of the aura-paper used must exceed the object's outer surface area. Consequently, larger and more geometrically complicated objects require proportionally more aura.

Inanimate objects offer relatively little resistance. Living creatures and Nen-infused objects resist according to their aura and physical integrity, making Orikata difficult to impose directly upon a resisting Nen user.

The flattened target remains physically intact and may later be restored by unfolding it. So long as an Orishikigami sheet contains an object, it cannot be dispelled.

畳み (tatami) - The Folding

Once flattened, a target can be folded like paper.

The user may employ ordinary origami principles - mountain folds, valley folds, pleats, accordion folds and increasingly complex crease patterns - to compact or rearrange its planar form.

Folding does not alter the object's fundamental composition. When unfolded and restored, ordinary folds disappear and the original three-dimensional structure returns.

This folding can be done manually, or mentally by the user focusing on the folding they intend to perform.

Tato (畳紙) - Folded Keeping

Flattened objects may be folded into compact packets and carried on the user's body.

Their mass is not reduced, making the user's carrying capacity a natural limitation. More aggressive compression requires increasingly complicated folds and consequently takes longer to unfold.

This allows the user to carry weapons, tools and equipment with almost no concern for their ordinary volume while still having to account for their weight.

紙人形 (kami ningyō) - Paper Doll

The user applies Tatami to themselves.

Because their own aura offers no resistance, self-flattening is considerably easier than flattening another Nen user. The user can become paper-thin, fold their body, slip through narrow openings, conceal themselves against surfaces and radically alter their profile to avoid attacks.

Nen Type: Transmutation, Emission

The user transmutes their aura into a cloud-like substance possessing physical properties resembling a combination of clouds, thick fog and cotton.

The transmuted cloud can exist at a wide range of densities, from an almost air-like mist to a dense, cotton-like material capable of supporting weight and resisting physical force.

Rather than producing and controlling the cloud directly from their body, all applications of the Hatsu are deployed through small emitted constructs called Silver Lining Seeds.

Silver Lining Seeds

To create a cloud, the user first emits a small, condensed orb of aura called a Seed.

A Seed can be:

• Placed directly onto a surface;
• Left suspended at a point in space;
• Fired by the user in a straight line as an Emission projectile. The seed travels with a constant speed, bouncing off obstacles, until hatched.

Before releasing a Seed, the user determines the basic properties of the cloud it will produce: Density, Radius, Activation trigger, Rate of release

Activation may be immediate, occur after a predetermined delay, or depend upon a simple predetermined trigger, such as physical contact, movement within its immediate vicinity, or an aura disturbance.

Once activated, the Seed releases the aura stored within it at a fixed Rate of release, expanding into a roughly spherical cloud centered around the point where the Seed activated. The cloud can go around obstacles and walls, enveloping them, and can squeeze through small (1mm) openings. Once the cloud has formed, its location, radius and density are fixed.

The cloud gradually loses aura and dissipates over time. External forces can accelerate this process by physically dispersing the transmuted aura.

Cloud Density

The clouds made with Silver Lining can vary in density and solidity, from having the consistency of fog, to lose cotton, to packed cotton.

Increasing density simultaneously increases opacity, physical cohesion, resistance to movement, ability to absorb and redistribute force and ability to support weight.

• At its lowest density, the cloud resembles a light fog. It provides little physical resistance and is mostly useful for obscuring vision.
• At moderate densities, the cloud resembles thick fog or extremely loose cotton. Moving through it produces noticeable resistance, making rapid movement increasingly difficult.
• At high densities, the cloud becomes soft and fluffy like tightly packed cotton. It can substantially impede movement, cushion impacts and temporarily support physical objects.
• At maximum practical density, the cloud behaves as a soft solid. It can support a person's weight and function as a temporary platform, wall or barrier.

Even at maximum density, however, the cloud does not possess the structural integrity of an actual solid object. Sufficiently concentrated force can penetrate and disperse it.

Techniques

Fog Bank

The user deploys a large, low-density cloud intended primarily to obscure vision.

Fog Banks require relatively little aura for their volume and can cover substantial areas.

Cotton Field

The user deploys a moderate-to-high density cloud across an area.

Anyone moving through the cloud experiences considerable physical resistance, making rapid movement, dodging and sudden changes of direction difficult.

Nimbus

The user creates a small, extremely dense cloud capable of supporting physical weight.

Cloud Nine can function as a temporary platform suspended in mid-air.

Multiple Seeds may be deployed at different positions to create stepping stones, allowing the user or others to traverse otherwise empty space.

Cloud cushion

The user deploys a dense but deformable cloud intended to cushion impacts.

Rather than stopping an object immediately, the cloud deforms and increases the distance over which the impact is brought to a halt.

Cloud Wall

The user concentrates a large amount of aura into a relatively small volume, producing a maximum-density cloud.

The resulting cloud functions as a temporary barrier capable of obstructing movement and absorbing attacks.

Nen Type: Enhancement, Emission

Critical dimension allows the user to Enhance their capacity for physical precision, reducing the difference between a consciously intended physical action, and its actual execution.

Rather than enhancing raw strength, speed, or durability, the Hatsu primarily enhances the biological processes responsible for accurate movement: proprioception, hand-eye coordination, fine motor control, muscular recruitment, tactile sensitivity, force modulation, timing, spatial judgment;

The user can consciously define one or more parameters of an intended action and use Enhancement to reduce their deviation from those parameters, such as: position, distance, angle, orientation, depth, trajectory, timing, applied force, velocity, aura allocation.

Multiple parameters may be enhanced simultaneously, allowing the user to perform extremely complicated movements with extraordinary precision, down to micrometers and milliseconds.

The ability does not make the user stronger or faster, nor does it grant knowledge and information to the user they do not already possess.

Datum – Point of Reference

The user establishes a “Datum” point either by touching a point on a person, object or structure, or by emitting a small amount of aura onto it through the eyes from a short distance.

The Datum acts as a spatial reference, from which other points may be measured by the user. By using the Hatsu through Gyo, the user gains instinctive knowledge of the exact distance to the Datum, and distances between multiple Datums.

Profile – Measure of Form

Through careful visual, tactile and aura examination, the user constructs a mental spatial model of a target.

Enhancement improves the precision of their examination and their ability to recognize small deviations in position, geometry, movement and physical response.

The longer and more thoroughly the user examines something, the more reliable the Profile becomes.

Profile does not allow the user to see through solid matter. Internal structures must be inferred from known anatomy, geometry, external measurements or other available information.

True Position – Point of Intervention

Using visible features, established Datums and the user’s own knowledge, the user can define a specific location on the target.

The user then Enhances their physical execution towards that point.

The user may specify approach angle, penetration depth, orientation, force, timing, etc.

The execution can be an attack with a limb or weapon, a medical or machining operation, etc.

True Position does not guide an attack after it has been performed. The user's body simply executes the intended movement with greatly reduced error.

Moving targets therefore remain substantially more difficult than stationary ones.

Tolerance – Margin of Error

The user consciously establishes an acceptable deviation for an action.

The narrower the specified Tolerance, the greater the concentration and aura required to maintain it.

Broad tolerances can be maintained relatively casually.

Millimeter-level precision during complicated movement requires substantial concentration.

Sub-millimeter precision, particularly against moving or resisting targets, becomes increasingly expensive.

Multiple simultaneous tolerances compound this difficulty.

Repeatability – Practiced Hand

Once the user has repeatedly performed and thoroughly learned a particular physical action, they may Enhance their ability to reproduce its execution.

The more familiar the user is with the procedure, the smaller the variation between repetitions.

Additionally, with familiarity the aura cost even for higher precision executions is reduced.

Limitations and Conditions

No information generation: Critical Dimensions cannot reveal unknown information.

Garbage in, garbage out: Incorrect measurements, anatomical assumptions, Datums or diagnoses result in correspondingly precise mistakes.

Physical possibility: The Hatsu cannot make the user's body perform movements beyond its physical capabilities. Enhancement applied normally to the body may improve those capabilities, but this is separate from the precision effect.

Reaction limitation: The user cannot correct for changes they have not perceived. An opponent who moves unpredictably can invalidate an otherwise perfect calculation.

Moving-reference problem: Precision decreases when Datums move independently, deform, become obscured or otherwise cease to provide reliable references.

Tolerance cost: Aura expenditure and concentration increase as the demanded margin of error decreases. Simultaneously controlling several parameters is substantially harder than controlling one.

Cognitive load: Extreme precision requires intense attention. Maintaining several Datums, tracking a moving opponent and stacking multiple tolerances simultaneously can overwhelm the user's ability to process the situation.

Combat Application

With advance medical, anatomical and acupuncture knowledge, the hatsu can be used to accurately target opponent’s joints, nerves, tendons, blood vessels, organs, anatomical pressure points, acupuncture points and other structurally vulnerable locations, as well as aura nodes, aura flow channels and weaknesses or irregularities in opponents aura defences.

P.S.

That's right. I made GD&T into a Hatsu. Th-th-that's all Folks!

Nen Type: Transmutation, Conjuration

The Hatsu allows the user to transmute their aura into five distinct paste-like substances, each produced from one fingertip of either hand. While connected to the user's aura, each paste behaves as a malleable transmuted material whose consistency, movement and shape remain under the user's control.

The paste may be dispensed in one of two ways:

• Cream Mode – by squeezing the finger, producing a thick controllable paste.
• Spray Mode – by pressing on top of the fingertip, dispersing the material into a fine mist suitable for coating surfaces.

Once the paste completely loses contact with the user's aura, it undergoes a one-way phase transition. The transmuted aura becomes a stable conjured material, permanently fixing its physical properties until it naturally deteriorates or is deliberately removed.

Different pastes may be layered or mixed before curing, producing materials whose properties combine according to the proportions used.

Once cured, the materials gradually lose aura and eventually crumble away.

Thumb – Quickcrete

Produces a structural paste intended for construction and support.

While fluid, it can be shaped freely.

After curing it becomes an extremely rigid material with excellent compressive strength, although it remains relatively brittle when bent or twisted.

Light gray as cream, darker matte gray when cured.

Index – Stick-'Em-Up

Produces a variable-adhesion paste.

While fluid, the user can freely adjust how strongly it sticks.

After curing, its adhesion becomes fixed, allowing it to function as anything from removable tape to industrial-strength adhesive.

Amber as cream, pale yellow when cured.

Middle – Spring Juice

Produces an elastic paste capable of storing mechanical energy.

While fluid it stretches and deforms easily.

After curing it behaves like an extremely resilient rubber, capable of compressing, stretching and releasing stored energy without permanent deformation.

Lime green as cream, dark green when cured.

Ring – Chem Trail

Produces a chemically reactive paste.

While connected to the user's aura, the user may define a single environmental trigger.

After curing, the material permanently reacts to that trigger.

Possible triggers include heat, cold, water, light, pressure, vibration or aura.

Possible reactions include expansion, contraction, hardening, softening, foaming, crumbling, melting, bursting, inflation, deflation, etc.

The speed at which the reaction spreads from the trigger can be adjusted

Once cured, the trigger and reaction are set and cannot be changed

Iridescent translucent violet as cream. When cured, turns opaque purple with veins that are colored based on the trigger.

Little Finger – Sponge Brake

Produces a damping paste.

While fluid it readily absorbs impacts and vibrations.

After curing it becomes a material that dissipates kinetic force, vibration, heat and even small quantities of aura, greatly reducing the energy transmitted through it.

Light blue as paste, deep navy blue when cured.

Bubble Blend

Bubble Blend allows the user to combine two different pastes as they produce them.

To activate the technique, the user joins the two corresponding fingertips together (either on the same or different hands), forming a closed circular channel between them. The user then blows through the loop while supplying aura.

The user can control the ratio of each paste in the mixture, and even adjust it dynamically as they produce it.

The aura inflates into a bubble composed of both paste types simultaneously.

The bubble remains soft and controllable while connected to the user's aura. Once contact is broken, it cures exactly as the ordinary pastes do, permanently fixing the combined material's properties.

Quickrete + Stick-'Em

Structural Mortar – A rigid construction material that permanently bonds to surfaces.

Unlike ordinary Quickrete, the cured material strongly adheres to whatever it touches.

Applications: Structural repairs, Anchoring, Barricades, Permanent restraints

Quickrete + Spring Juice

Reinforced Elastomer – A concrete-like material with remarkable elasticity.

It can absorb impacts without shattering, flex under load, and return to its original shape.

Applications: Shock absorbers, Flexible bridges, Impact armor, Spring-loaded mechanisms

Quickrete + Chem Trail

Reactive Composite – A structural material whose physical behavior changes when exposed to a chosen trigger.

Examples include self-expanding supports, heat-triggered braces, or moisture-activated reinforcement.

Applications: Smart construction, Delayed deployment. Environmental traps

Quickrete + Sponge Brake

Energy-Absorbing Concrete – A dense material that sacrifices rigidity to dissipate enormous amounts of force.

Rather than cracking, it cushions impacts.

Applications: Blast barriers, Crash cushions, Safe landing pads, Protective walls

Stick-'Em + Spring Juice

Elastic Adhesive: A highly stretchable adhesive that remains firmly attached while deforming dramatically.

♦ Possesses the properties of BOTH RUBBER AND GUM! ♥

Applications: Elastic restraints, Climbing aids, Bungee anchors, Retrieval lines

Stick-'Em + Chem Trail

Reactive Adhesive - An adhesive whose bonding behavior changes according to environmental triggers.

Examples include glue that activates in sunlight, releases in water, or strengthens when heated.

Applications: Traps, Timed attachments, Environmental locks

Stick-'Em + Sponge Brake

Damping Gel – A soft adhesive that absorbs impacts and vibrations.

Instead of rigidly fixing objects together, it cushions them.

Applications: Shock mounts, Silent movement, Equipment protection, Vibration isolation

Spring Juice + Chem Trail

Smart Elastomer – An elastic material whose stiffness or stored energy changes when activated.

It may rapidly contract, soften, stiffen, or release stored energy depending on its programmed trigger.

Applications: Mechanical actuators, Timed launches, Self-deploying devices

Spring Juice + Sponge Brake

Viscoelastic Foam – A material combining elasticity with heavy damping.

It slowly deforms under force before gradually returning to shape.

Applications: Energy absorption, Protective padding, Capture cushions, Impact reduction

Chem Trail + Sponge Brake

Reactive Dampener – An energy-absorbing material that changes its damping properties according to environmental conditions.

Examples include becoming rigid on impact, softening under heat, or increasing drag when exposed to aura.

Applications: Adaptive armor, Variable shock absorbers, Responsive protective equipment

https://preview.redd.it/vfrzlsvdpshh1.png?width=1000&format=png&auto=webp&s=4e4f04459f90fd658ccb719f5d1a3ccda216c6f1

Nen Type: Emission, Manipulation

The user emits humanoid Nen Beasts called “Proxy Agents”

Each Agent is assigned a specific task, behavioral framework, and variable degree of autonomy when summoned.

The Agents are capable of speech, carrying out physical errands, operate light machinery, interact with people.

The Agents have limited intelligence, which is more functional than human. They can interpret language, adapt to complications, and communicate information, but perform best when given clearly defined objectives, permissions and constraints.

TCP – Tangible Chore Proxies

The user summons HTTPS in the physical space.

The Proxy Soldiers appear as small (60-75 cm) robotic humanoids, with a stylized modern appearance. Their heads are round and featureless, with their faces appearing as basic stylized graphics on the front.

TCP Soldiers are best suited for physical errands, maintenance, operating machinery, terminals or computers, recon and guard duty, communications.

A TCP soldier can enter powered electrical and electronic systems through direct physical contact, or through wireless signals.

IP – Intangible Proxies

The user summons HTTPS while in physical contact with a powered electrical or electronic system, or by a TCP entering one.

IP Soldiers can travel through electrical wiring, computer networks, local servers, telecommunication systems, and wireless signals.

IP Soldier’s movement is restricted by actual connectivity. It cannot reach an isolated device with no available path, unless it physically exits one system and enters another.

When inside an electronic device with a visual interface, such as a screen, the IP Soldier can create an avatar to interact with the user, which will fit its assigned role. The avatar can be as simple as a very low-rez emoji, to an animated icon, a profile image, a mascot, or an animated character. This appearance is purely aesthetic.

HTTPS Classes

When summoned, each HTTPS Agent is assigned a task which determines its skills and capabilities

Courrier – Dedicated transport specialist

• TCP – Carries physical packages, delivers messages, escorts valuables, memorizes and navigates routes.
• IP – Transfers files and data securely, performs authentication of recipient, establishes encrypted communication routes

Sentinel – Security specialist

• TCP – Patrols areas, detects intruders, raises alarms, guards entrances, tracks movement
• IP – Monitors networks, watches login attempts, detects unauthorized access, monitors traffic, reports suspicious activity

Hacker – Electronic infiltration specialist

• TCP – Operates electronic devices, connects and assembles hardware, interfaces with terminals
• IP – Explores systems, finds vulnerabilities, bypasses permissions, injects software and retrieves protected information.

Archivist – information management specialist

• TCP – Reads books and files, catalogues and recalls information, organizes records.
• IP – Searches databases, cross-references information, builds indexes, summarizes datasets, performs research.

Operator – machine specialist

• TCP – Drives vehicles, operates machinery, uses tools, performs maintenance.
• IP – Controls industrial systems, operates drones and electronically-controlled systems and robotic equipment.

Concierge – Social interaction specialist

• TCP – Greets visitors, gives directions, answers basic questions, guides people.
• IP – Website avatar, customer support, interactive tutorial, AI assistant, virtual receptionist

Detective – Inspection and investigation specialist

• TCP – Performs scouting, reconnaissance and investigation tasks, collects evidence, interviews witnesses, observes suspects.
• IP – Searches digital history, correlates information, reconstructs timelines, tracks digital activity.

Engineer – Maintenance and repair specialist

• TCP – Repairs equipment, builds mechanisms and devices, performs maintenance
• IP – Diagnoses system failures, maintains automation, synchronizes equipment, performs maintenance

Limitations and Conditions

Each HTTPS Agent is very aura-light, allowing to create large quantities of them at fairly low aura costs. However, they are very ineffective as combatants, having very little durability and combat capabilities. Even a light Nen-enhanced attack can destroy them.

However, more complex tasks and greater intelligence and autonomy require more aura investment.

Once created, an Agent’s Class and tasks are assigned and set, and cannot be changed. If the task is complete, the Agent dispels. Agents with prolonged tasks gradually loose aura, but can be recharged by the user – or other HTTPS Agents.

HTTPS Agents do not possess knowledge or skills that the user does not possess.

P.S. - Hunters' Tavern

So... why that picture at the start?

This hatsu was created to answer a question - how does the Hunter Association run a site in early 2000s with such an advanced AI assistant? Well, this is my take on the answer. It's a Hatsu of a Hunter who is responsible for maintaining the site, and using Nen to ensure only Hunters can access the sensitive and restricted information.
Additionally, it could be responsible for the Q - the encryption message network Hunters can use.

Nen Type: Conjuration

The user can conjure one of seven crustacean claws over their hands, each with unique properties.

Each claw is based on and mimics the anatomy and specialization of different crustacean species.

Each claw can be conjured independently on either hand, allowing the user to mix-and-match different claws.

Crusher of Karkinos

The user dons a massive claw resembling that of the Coconut Crab.

The claw possesses extraordinary structural strength and crushing power, capable of exerting tremendous compressive force. Its pincer can break steel beams, crush stone, and overpower most physical restraints through sheer brute force.

However, the claw is extremely large and heavy, weighing nearly as much as the user and extending almost to the ground when relaxed. As a result, it is slow to accelerate, cumbersome to maneuver, and poorly suited for rapid combat.

Fist of Karkinos

The user dons a specialized striking appendage modelled after the club of a Peacock Mantis Shrimp.

The claw has club-like fists and contains an internal spring-loaded biological mechanism capable of storing elastic energy before releasing it almost instantaneously. Upon release, the fist accelerates at over 100,000 m/s2 to over 20 m/s in just a few milliseconds, delivering an impact powerful enough to fracture or shatter most solid materials even without Nen reinforcement.

The striking surfaces are constructed from layered substance mimicking chitin, withstanding the immense stress generated by the impacts. However, after each strike, the internal mechanism must rewind before another full-powered punch can be delivered.

Awl of Karkinos

The user dons a slender piercing claw modelled after the pincers of a Blueleg Mantis Shrimp

This claw features the same mechanism as Fist of Karkinos, but rather than clubs it features strong, thin, piercing claw. The mechanism allows the claw to accelerate and reach speeds similar to Fist of Karkinos, penetrating piercing most solid materials even without Nen reinforcement.

The claw is structured similarly to Fist of Karkinos, being able to resist the immense stress while piercing tough materials, but also takes time to rewind and be ready for another strike.

Snap of Karkinos

The user dons a compact claw resembling that of a Pistol Shrimp.

The claw can rapidly snap shut, generating an intense cavitation bubble that propagates forward as a concentrated pressure projectile. Upon collapse, the bubble generates a shockwave capable of heavily damaging soft tissue and fracturing relatively weak rigid materials.

This claw is by far the smallest, with the pincers being comparable in size to a regular human hand (though the back of the claw reaches up to the forearm). Preparing each shot requires the claw’s internal mechanism to be cocked, which takes some time, though less than with the Fist. This allows shooting in relatively quick succession.

The cavitation projectiles aren’t Nen attacks, but can be enhanced with emission Nen to increase their damage.

Grapple of Karkinos

The user dons an elongated, multi-jointed claw modelled after the long limbs of the Japanese Spider Crab.

Unlike the other claws, Grapple sacrifices raw strength in favor of reach, dexterity and precision. Its extended articulation allows the user to grasp distant objects, climb surfaces and restrain opponents from afar.

Despite the reach, the claw possesses relatively little crushing forces and performs poorly in direct offensive combat.

Shield of Karkinos

The user dons a broad, heavily armored claw modelled on the defensive claws of the Box Crab.

The claw functions primarily as a shield, possessing exceptional toughness and impact resistance. Its internal structure and curved shape deflects and resists incoming attacks, allowing it to absorb tremendous punishment with little damage.

Its massive size and weight greatly limits the user’s dexterity, and this claw has very little offensive capability.

Shear of Karkinos

The user dons a wide but thin shear-like claw modelled on the Cutter Claw of an American Lobster.

The claw specializes in cutting efficiency, has long and serrated pincers that can slice through most materials – even some metals – with ease.

The claw is faster, lighter and smaller than Crusher, but is not as tough or powerful.

Limitations and conditions

Only one claw may be conjured on each hand at any given time.

Changing a claw requires dismissing the currently conjured one before another may be donned.

While the claws greatly exceed human physiology, they are still subject to the physical limitations of their anatomy, and the user's own strength and capacity to wield them.

Nen Type: Manipulation, Emission

Dead Drop – Ghost Script allows the user to construct programmable Nen circuits from small emitted glyphs called Logic Nodes. Each node performs a single predetermined function and may be connected to other nodes through emitted aura links, allowing complex behaviors to emerge through combinations of simple operations.

Rather than directly manipulating people or objects, the Hatsu manipulates the conditions under which effects occur. Individual nodes are simple and limited, and very cheap in terms of aura; the ability's strength lies in designing and arranging complete logical systems.

Basic Nodes

The user emits small Nen glyphs onto physical surfaces or objects. Once placed, nodes remain stationary until dispelled or destroyed.

Each node belongs to one of several functional categories.

Sensor Nodes – Monitor specific conditions and generate logical signals.

• Aura detection
• Physical contact
• Motion
• Pressure
• Sound
• Light
• Temperature
• Time
• Activation of another node

Logic Nodes – Process incoming signals using logical operations. Complex behavior is achieved by combining multiple logic nodes.

• AND
• OR
• NOT
• XOR
• NAND
• NOR
• XNOR

Memory Nodes – Maintain internal state within a circuit. Allow circuits to remember previous events, count activations, alternate behaviors, or execute actions after specified intervals.

• Latch – stores binary information of another sigil’s state.
• Flip-Flop – changes signal to opposite before transmitting it
• Counter – when receiving a signal, increases by 1.
• Register – Store and transmit an arbitrary value that other nodes can read, modify, or compare.
• Timer – When receiving a signal, starts a timer. If another signal is received before it runs out, transmits it, otherwise resets.
• Delay – When receiving a signal, delays it for a set time before transmitting it.

Output Nodes – Produce physical Nen effects when activated. Each Output Node performs only one predefined action. Available outputs include:

• Emit an aura pulse or beam
• Release stored aura
• Transfer aura
• Manipulate an attached object
• Apply pushing, pulling or rotational force
• Lock or release manipulated objects
• Reinforce an object with Enhancement
• Emit light, sound or vibration
• Transmit activation signals to connected nodes

Recorder Nodes

Recorder Nodes are special glyphs capable of capturing and replaying aura. An inactive Recorder Node may be armed to record the first continuous Aura Process that passes through it.

The recorded process is preserved together with its:

• Aura content, type and amount
• Structure
• Direction
• Duration
• Physical properties

Once recording is complete, the node becomes sealed and cannot record another process.

Recorder Nodes have a fixed capacity. This capacity is shared between Aura amount, count and complexity. For example it can store:

• One powerful but simple Aura Process – An powerful Enhancement punch
• Multiple simple Aura Processes of the same type – A number of Emission projectile
• One complex Aura Process – A use of a Manipulation/Conjuration Hatsu

When activated, the Recorder reproduces the recorded Aura Process exactly as it was originally performed.

• If storing multiple Aura Processes, it can reproduce them once per Node activation.

The reproduced process retains its original characteristics but is powered entirely by the aura stored within the node.

Programming

Nodes are connected through emitted aura pathways.

Signals propagate through the network according to the circuit's logical structure.

Large circuits may simultaneously process multiple independent logical chains.

Multiple circuits may coexist without interfering unless explicitly connected.

Limitations and Conditions

• Every Logic Node performs exactly one predefined function.
• Circuits require uninterrupted aura pathways between connected nodes.
• Destroying or removing a node breaks every circuit connected through it downstream.
• More complex circuits require proportionally greater concentration and aura maintenance.
• Recorder Nodes may contain only one Aura Algorithm at any time.
• Stored Aura Processes are limited by both Aura Capacity and Complexity Capacity.
• Once every stored charge has been discharged, the Recorder Node immediately dissipates.
• Stored aura gradually destabilizes over time. More complex Aura Processes deteriorate more rapidly than simpler ones.

• Nen Type: Specialization
• Schrödinger's Actor allows the user to temporarily divide their own existence into multiple equally valid continuations, each representing a distinct approach toward a single declared objective.
• During the ability's duration, no continuation is inherently the "real" user; instead, the user's identity exists as a superposition distributed among all active branches.
• Each continuation possesses the user's memories, personality, aura, equipment, Nen abilities and capacity for independent thought.
• Every branch sincerely believes itself to be the original user and pursues the declared objective to the best of its own judgment.
• Unlike ordinary clones, these continuations are not copies of the original. Rather, they are equal in uncertainty over which is the legitimate user's body, remaining unresolved until the ability concludes.

Activation

• To activate the Hatsu, the user must clearly define:
  • A single objective.
  • The condition upon which the ability will resolve.
  • The criterion by which the final outcome will be selected.
• The declared objective must be concrete and achievable, such as escaping a location, retrieving an object, investigating an event, defeating an opponent, or reaching a destination.
• The optimization criterion determines which continuation will remain once the ability resolves. Examples include:
  • Least physical injury.
  • Greatest amount of information obtained.
  • Highest probability of mission success.
  • Fastest completion.
  • Safest escape.
• Once declared, neither the objective nor the optimization criterion may be altered until the ability ends.

Branches

• Each continuation must pursue the objective through a meaningfully distinct course of action.
• Branches may differ in:
  • Route taken.
  • Strategy employed.
  • Timing.
  • Tactical decisions.
  • Social interactions.
  • Use of Nen.
• Branches that cease to meaningfully diverge automatically collapse into one another.
• Every continuation possesses full autonomy and adapts independently to changing circumstances while pursuing the declared objective.

Mutual Exclusion

• The continuations exist independently of one another.
• They cannot:
  • perceive one another,
  • communicate,
  • cooperate,
  • exchange information,
  • intentionally interfere with one another.
• Should two continuations physically occupy the same location, each subconsciously interprets the encounter in a manner consistent with its own reality, preventing recognition of another self.

Collapse

• The ability resolves immediately when the declared completion condition is satisfied.
• At that moment, all surviving continuations collapse into a single remaining history.
• The surviving continuation is selected solely according to the optimization criterion declared upon activation.
• All remaining continuations immediately cease to exist.
• The surviving user retains the complete memories and experiences of every branch as though recalling several equally vivid lives simultaneously.
• Physical consequences to the User do not transfer between branches. Only the surviving continuation's physical state remains.
• However, the actions, effects and interactions each branch had with the world remain unchanged.

Limitations and Conditions

• The objective, completion condition, and optimization criterion must all be declared before activation.
• The ability is limited by both time and number of continuations. 2 continuations allow for a 1-hour long task, each extra one divides that time.
• Once converged, the user must reconcile the memories of all the continuations to converge their identity, before they are capable of using the ability again. This takes the same amount of time as the total sum of each continuation’s existence.
• While active, each continuation shares in the user’s aura pool, dividing it equally between themselves.
• Every branch must genuinely pursue completion of the objective. The user cannot intentionally designate sacrificial or deliberately ineffective continuations.
• Every continuation must meaningfully differ from the others. Branches that become effectively identical automatically merge.
• Continuations cannot knowingly interact with one another in any manner.
• If every continuation dies before the completion condition is met, the user dies.
• The optimization criterion is absolute. The user cannot manually choose which continuation survives.
• The greater the number of active continuations, the greater the aura consumption and the heavier the mental burden when memories converge after collapse.
• After collapse, the user experiences every discarded continuation's memories as genuine personal experiences. Repeated use may produce severe psychological strain, difficulty distinguishing lived events from unrealized histories, and emotional attachment to people or events that no longer exist.

蟬命 (Chán Mìng) – Cicada Mandate

Nen Type: Manipulation, Emission

Secondary: Diffusive Levy, Diffusive Induction

The user emits small orbs of aura – or “eggs”, that they can plant on others. Once attached, the eggs act as passive parasites, slowly feeding on the host’s aura while remaining completely undetectable and unfelt by non-Nen users. The eggs possess no inherent defence, and can easily be removed by Nen users even if they have no exorcism training.

Development Cycle

Egg Stage – The egg remains dormant unless the host is repeatedly exposed to the user’s message (speeches, broadcasts, writings, videos, or second-hand discussion). Sympathetic exposure accelerates maturation. Hostility or complete indifference causes the egg to starve and vanish. The maturation process is slow, often requiring weeks or months of ordinary exposure, even for individuals that are enthusiastic and receptive to the user’s message.

Nymph Stage – When the egg hatches, a small Nymph forms on the host. The nymph continues to leech aura off their host, while gradually and subtly suppressing the host’s critical resistance, personal beliefs, and moral friction toward the user’s ideology. The host becomes increasingly receptive and supportive without realizing they are being influenced. The nymph also stores a portion of the leeched aura for later use.

Cicada Stage – The user must deliberately trigger molting through a public statement, broadcast, or symbolic act that serves as the emergence signal. The hosts must hear and understand the public statement, though they don’t need to recognize it as the emergence signal. There are three types of emergence:

• 凯旋 (Kǎixuán) – Triumphant Return:
  • The adult cicadas fly back to the user and are absorbed by them, delivering the stored aura as a substantial personal boost.
  • The hosts immediately return to their natural disposition, with no memory of having been influenced.
• 傳聲 (Chuán Shēng) – Transmitting the Song:
  • The cicada lays a limited number of new eggs (quantity proportional to the aura stored), starting with one on its current host, then seeks additional nearby targets to plant further eggs, expanding the network.
  • The Cicadas do not have any means of recognizing a person’s disposition towards the user, and lay eggs indiscriminately on anyone in the vicinity.
  • Generally, a cicada can get enough aura from average non-Nen user to produce one egg per 2 weeks on the host in the Nymph Stage.
• 蝉鸣 (Chán míng) – Cicada Song: The cicada remains on the host and begins its song.
  • For the duration, the host’s loyalty is amplified into fanatical obedience.
  • Multiple singing cicadas reinforce one another, creating a collective voice capable of overwhelming reason and morality.
  • In this state, any verbal command, call to action or suggestion from the user will be treated as absolute and followed without hesitation or doubt.
  • When the song ends, the cicadas dissipate. Hosts return to baseline disposition; those forced into acts that violently contradict their core morals may rebound into active hostility toward the user.
  • The duration of the song depends on how long the cicada spent on the host in its Nymph stage, e.g. how much aura it collected, however multiple hosts in close proximity allow cicadas to share the aura, averaging out the duration. The duration averages to roughly 1 hour per 2 weeks on the host in the Nymph Stage.
  • The user can also temporarily awaken the hosts, giving them ability to use Nen subconsciously. The aura is supplied from the Cicadas, and as such drastically reduces the duration of the technique.
  • The user can issue a more localized molting, without needing to make a public statement, when mass messaging is unavailable. This results in all nymphs in a 100m radius around the user to molt. This activation is more subtle, but the resulting aura return and propagation range are greatly reduced.

蝉之舞 (Chán zhī wǔ) – Dance of the Cicada

With this sub-hatsu, the user manifests one of three symbols of the Cicada, representing Shedding, Song, or Dream. Only one manifestation may be active at a time.

During Cicada Song, the user may choose to grant all affected hosts temporary access to a weakened version of the currently active technique.

• The techniques are fueled entirely by the aura accumulated by each host's Cicada.
• Once that aura is exhausted, the technique ceases for that individual. Non-Nen users lose access to Nen when the Song ends.

空蝉 (Kōng Chán) – Empty Cicada Shell

• Nen Type: Manipulation, Emission
• Upon activation, the user sheds an aura "shell" resembling their own body while instantly emerging a short distance away.
• The shell retains the user's appearance, posture, momentum, voice, and residual aura for several seconds before crumbling away.
• Through Manipulation, observers instinctively continue perceiving the shell as the user's true body until the illusion naturally collapses or is consciously recognized.
• Cicada Song
  • Hosts instinctively perform the technique in response to sudden danger.
  • A crude shell is left behind while the host reflexively repositions a short distance away.
  • The displacement is imprecise and limited (1-2 m), but greatly increases the survivability of large groups.
• Triumphant Return
  • The user may repeatedly molt in rapid succession without cooldown.
  • Multiple discarded shells may remain simultaneously, each continuing simple movements or speech before disintegrating.
  • The shells become increasingly convincing, retaining greater amounts of aura and making it difficult even for experienced Nen users to distinguish the real body.

蟬翼 (Chán Yì) – Cicada Wings

• Nen Type: Emission, Manipulation
• The user manifests vibrating aura wings behind their back resembling translucent cicada wings.
• Rather than producing physical force, the wings emit resonant vibrations (very loud sound).
• The sound disrupts the focus and concentration of nearby people. It also disrupts and destabilizes the aura of nearby people.
• Within a range of the user, fine aura control becomes increasingly difficult. Complex Nen techniques become less stable, while maintaining Ten, Ren, Gyo, In, or precise Hatsu activation requires noticeably greater concentration.
• Cicada Song
  • Every active host contributes their own resonance.
  • Nearby resonances synchronize into a collective interference field, dramatically amplifying the disruption.
  • Individually weak hosts become collectively capable of interfering even with powerful Nen users through sheer numerical resonance.
• Triumphant Return
  • The technique becomes much more powerful and disruptive.
  • Additionally, the resonance harmonizes with the user's own aura, stabilizing and synchronizing with the user's aura flow, greatly improving aura efficiency, control, recovery, and precision while reducing aura expenditure.

 蟬夢 (Chán Mèng) – Dream of the Cicada

• Nen Type: Manipulation
• The user subtly alters how people perceive and remember events involving them.
• Rather than creating false memories, the ability gently reshapes interpretation, emphasis, and recollection, causing observers to unconsciously construct narratives more favorable to the user.
• The alterations remain plausible and consistent with the target's own experiences, making them extremely difficult to recognize as manipulation.
• Cicada Song
  • Active hosts unconsciously synchronize their perceptions and recollections.
  • Shared experiences rapidly converge into a unified narrative, strengthening cohesion, mutual trust, and ideological consistency throughout the affected group.
• Triumphant Return
  • As the returning Cicadas deliver their stored aura, fragments of each host's perspective of the user accompany it.
  • For the duration of the enhancement, the user gains an extraordinary intuitive understanding of how others perceive them, allowing them to anticipate reactions, identify inconsistencies, and tailor speeches or actions with great effectiveness.

金蟬 (Jīn Chán) – The Golden Cicada

• Nen Type: Manipulation, Emission
• This technique cannot be activated through Song of the Cicada and may only be invoked through Returning Home after an exceptionally large number of mature Cicadas return simultaneously – roughly 1,000 person-weeks of Nymph cultivation.
• Upon receiving the returning aura, the user enters the Golden Cicada State, becoming the culmination of the entire network's accumulated faith, aura, and identity.
• The Golden Cicada State lasts proportionally to how much aura the user received. Every 1,000 person-weeks of Nymph cultivation corresponds to roughly 10 minutes of use.
• During this state, the user experiences dramatically heightened aura output, mental clarity, and control over every aspect of the Hatsu, while all other manifestations of Dance of the Cicada operate at their maximum potential.
• If the user would suffer an otherwise fatal injury during this state, their body may instead molt into a lifeless cicada shell while the user emerges nearby.
• This consumes a huge amount of aura – roughly 4,000 person-weeks of Nymph cultivation, and also ends the Golden Cicada State

 

Nen Type: Emission

Gleipnir is an Emission Hatsu that binds mutually agreed contracts into persistent Nen constructs. Rather than creating or negotiating agreements, the Hatsu recognizes and enforces promises that have already been voluntarily accepted by all parties.

The Hatsu does not judge morality, intent or fairness. It simply determines whether the agreed contractual conditions have objectively occurred and executes the contract's predetermined Settlement Clause.

Once established, the contract persists as an emitted Nen connection between all participating parties until it is fulfilled, expires or is settled following a breach.

Activation

A Gleipnir Contract may only be established after all parties have reached a voluntary agreement. Before a contract may be bound, every contracting party must be given a reasonable opportunity to understand the agreement they are accepting. To that end, the user must:

• Present the complete contract to all parties.
• Explain the nature and intended effect of the agreement.
• Explain the agreed Remedy and its consequences.
• Truthfully answer reasonable questions regarding the contract's terms and operation.
• Allow sufficient opportunity for every party to review the agreement before consenting.

The Hatsu is activated through a formal handshake.

Two activation methods exist.

• Bilateral Contract: The user shakes hands directly with another contracting party after the agreement has been concluded.
• Mediated Contract: Two other parties shake hands after reaching an agreement while the user places both hands over their clasp, acting as the registrar of the contract.

The handshake serves as the final act of mutual consent and permanently records the agreement within the Hatsu.

Binding

Upon activation, every contracting party manifests a Nen shackle around one wrist.

The shackles manifested with Emission, with minor Transmutation for the form, and are invisible to non-Nen users.

Each shackle is connected by a chain. The chain normally remains hidden through In, does not physically restrict movement and may extend indefinitely regardless of distance between the parties.

At the moment the contract is bound, each participant irrevocably commits a portion of their aura into their own shackle. This aura remains sealed within the contract for its entire duration and serves as the primary resource from which the Hatsu executes the agreed Settlement.

The amount of aura committed is determined by the complexity, duration and potential consequences of the contract. More demanding agreements require greater initial investment from every participant.

Contract Formation

Every Gleipnir Contract must clearly define:

• The contracting parties.
• The obligations of each party.
• The duration or completion condition of the agreement.
• Exactly one Settlement Clause.

Contracts that are impossible to perform, internally contradictory or lack a Settlement Clause cannot be bound by the Hatsu.

Performance

While the contract remains active, the Hatsu continuously observes whether each contractual obligation has been objectively fulfilled.

The Hatsu does not determine moral intent, good faith or fairness unless those concepts have themselves been explicitly defined within the contract.

Only observable contractual conditions are evaluated.

If every obligation is fulfilled or the agreement naturally expires without breach, the shackles dissolve.

Settlement

Every contract must contain exactly one Settlement Clause.

The Settlement Clause determines the specific effect the Hatsu is permitted to execute should the contract conclude through either successful completion or contractual breach.

The settlement consists of three elements:

• Trigger – the condition under which Settlement occurs.
• Execution – the complete sequence of Nen effects performed by the Hatsu.
• Termination – the condition under which Settlement ends.

The Hatsu possesses no authority beyond executing the agreed Settlement.

The more specific, objective and narrowly defined the Settlement Clause, the more efficient and powerful its execution becomes.

Settlement Clause Types

Compensation: Upon breach, aura is transferred from the breaching party to the injured party according to the value specified within the contract. This represents repayment of the contractual loss rather than punishment.

Mutual Reward: If every party successfully fulfills all contractual obligations, all participants receive an agreed Nen boon, such as increase in Ren or Hatsu power, efficiency or potency, etc. No effect occurs if the contract ends through breach.

Penalty: Upon breach, the violating party immediately suffers a predetermined restriction.

• Possible penalties include: temporary Zetsu, aura suppression, paralysis, restricted movement, inability to speak, inability to use specified Nen techniques, temporary loss of physical strength, involuntary sleep, temporary sensory deprivation, permanent loss of a Hatsu, permanent loss of Nen, or even death.
• The severity of the penalty is proportional to the specificity and importance of the violated obligation.

Restriction: Rather than immediately punishing the breaching party, the Hatsu manifests the chain into a visible restraint.

• The restraint specifically prevents actions prohibited by the contract while remaining otherwise intangible, and manifests on whatever object or body part associated with said action.

Restitution: Upon breach, the violating party is compelled through a Restriction or Penalty to restore the agreed consideration.

• If restitution becomes impossible, the Hatsu enacts a predetermined Restriction, Penalty or Compensation

Escrow: Both parties deposit an agreed quantity of aura into the contract upon activation.

• If the contract is successfully completed, the stored aura is returned together with a proportional bonus.
• If breached, the violating party forfeits their deposit while the other party immediately receives both deposits.

Ongoing Covenant: The Settlement Clause remains dormant after successful completion and instead grants a continuing reciprocal benefit while all parties continue honouring the agreement.

• Should any party later violate the continuing terms, the covenant immediately converts into the agreed penalty.

Contract Precision

The effectiveness of Gleipnir depends upon contractual precision.

Contracts specifying objective conditions with specific terms, limitations, and what counts as a breach or fulfillment of contract, produce exceptionally powerful bindings.

Limitations

Participation in the Contract must be voluntary and informed. Both parties must be informed by the user about the terms of the contract, and its consequences if fulfilled, breached or terminated.

However, it doesn’t require full cognizance of the contract by the parties.

It also does not necessitate the knowledge of the Hatsu’s existence or that it will be the enforcement mechanism to fulfill the settlement.

The contract must be accepted before the activating handshake.

Impossible, contradictory or undefined agreements cannot be bound.

The user cannot modify the contract after activation.

The Hatsu remains completely impartial and enforces the contract equally against every participant, including the user.

Every contract must contain exactly one Settlement Clause; multiple penalties or rewards must be combined into a single coherent contractual outcome.

More specific contracts create stronger bindings, while vague or ambiguous agreements weaken both enforcement and Settlement.

Nen Type: Manipulation (Primary), Emission

Traces of the Passed is a Manipulation Hatsu founded upon the principle that every physical action leaves behind microscopic Residual Aura Imprints, or Traces within the space through which it was performed.

By synchronizing with these imprints, the user may temporarily surrender control of their own body, allowing it to faithfully reenact another person's recorded physical actions. The Hatsu manipulates only the user's body and never reproduces thoughts, speech, emotions, perception, memories or Nen techniques.

Chaski Katin – Following the Messenger

The user activates Chaski Katin by stepping onto a suitable Trace, typically an aura footprint, establishing synchronization with the aura signature that produced it.

• The user doesn’t gain any knowledge of the person they are tracking by stepping onto their footprint.
• If the user is familiar with the person they intend to track, and know their aura signature, they can recognize if the Trace they are following belongs to that person.

Once synchronized, the Hatsu locks onto that individual's continuous Trace, ignoring all others until synchronization is terminated or naturally fails.

The user's body is automatically manipulated to reproduce the recorded sequence of physical actions in the order they originally occurred.

The Hatsu reconstructs actions rather than elapsed time, allowing periods of inactivity to be skipped whenever the next recorded action is immediately possible.

The user can also pause the ability, remaining on the Trace without moving, and resuming it. If a recorded action cannot presently be performed due to environmental circumstances, the user may pause synchronization until those conditions become possible, then resume from the same point.

Traces gradually deteriorate with age. Older traces become progressively more difficult to perceive and synchronize with, often requiring direct skin contact with the ground or localized Zetsu in the feet to prevent the user's own aura from interfering with faint imprints.

Yuyay Quipu – Memory Knot

Yuyay Quipu allows the user to deliberately preserve physical actions by recording them into specially prepared Quipu – knotted cords infused with emitted aura in accordance with traditional Incan knot-recording methods.

To create a recording, a prepared Quipu must remain attached to a person's body throughout the entire action being recorded. The recording captures only physical movement and preserves neither thoughts, speech, emotions, perception nor Nen.

Traces cannot be recorded directly. To preserve an existing trail, the user must first synchronize with it through Chaski Katin, personally reenact the recorded actions, and record their own body while synchronization is active.

Each Quipu stores one continuous sequence of physical movement.

Paskay Yuyariy – Memory Unravelled

Paskay Yuyariy activates a completed Quipu by attaching it to the user's body.

Upon activation, the Hatsu manipulates the user's body to faithfully reproduce the recorded sequence of physical actions exactly as they were originally performed.

The recording conveys no understanding, experience or skill beyond the physical movements themselves. Successful execution therefore remains subject to the user's own physical capabilities and the surrounding environment.

Each Quipu may be activated only once. Upon completion of the recorded sequence, the emitted aura preserving the recording dissipates, rendering the Quipu permanently blank and requiring it to be prepared anew before another recording may be made.

Limitations

The Hatsu manipulates only physical bodily movement.

Thoughts, speech, memories, emotions, perception and Nen abilities are never synchronized or recorded.

Once synchronized, all aura traces other than the current target's are ignored until synchronization ends.

Recorded actions cannot bypass the user's physical limitations or environmental requirements.

Residual Aura Imprints weaken naturally over time.

Quipu record only continuous physical actions and are consumed upon playback.

Existing aura trails cannot be directly recorded and must first be reenacted by the user through Chaski Katin before being preserved using Yuyay Quipu.

"Let Justice Be Done, Though the Heavens Fall."

Nen Type: Transmutation (Primary), Conjuration, Enhancement

The Hatsu requires three genuine physical ritual implements. None are conjured through Nen, though each becomes a Nen focus while the Hatsu is active.

• The Gavel of Eunomia – establishes jurisdiction and procedural authority.
• The Scales of Dike – evaluate evidentiary burden.
• The Sword of Nemesis – enforces the Court's sentence.

Each implement must satisfy specific ceremonial standards determined by the user. Should any be destroyed, lost or replaced with an unsuitable substitute, the corresponding stage of the Hatsu becomes unavailable until another proper implement is prepared.

Themis Judgment – Trial by Law

The formal application of the Hatsu recreates a legal proceeding through Nen.

To initiate a Trial, the user must complete four procedural steps in order.

I. Declaration of Jurisdiction

• The user formally declares the body of law governing the proceedings.
• Examples include Hunter Association Law, Civil Law/Criminal Law/Military Law/Maritime Law/Contract Law of any given country, Duel Code, Emergency Authority, Tribal or Religious Law, or Any internally coherent legal system acknowledged by the user
• The declared jurisdiction determines how every subsequent action is interpreted.

II. Declaration of Participants

• The user designates everyone within approximately twenty metres as Trial participants and assigns their procedural roles.
• Possible roles include: Judge (May not necessarily be the user), Plaintiff, Defendant, Prosecutor, Defence Counsel, Witness, Bailiff, Juror (if the declared legal system requires one), Observer
• Every participant becomes subject to the procedural restrictions associated with that role.

III. Declaration of Matter Before the Court

• The precise legal issue must then be announced.
• Examples include: Murder, Theft, Contract Dispute, Trespassing, Self-defence, Violation of Hunter Regulations
• The Court may only evaluate matters directly related to the declared case.

IV. Opening the Court

• The user strikes the Gavel of Eunomia.
• The gavel need not physically strike a surface. Even lowering it through the air with the deliberate intention of opening proceedings produces the unmistakable sound of a judge's gavel.
• Upon the strike, a Courtroom Nen Space is established.

Courtroom Nen Space: The Courtroom is not an enclosed pocket dimension, but rather a Nen field occupying the surrounding area. It doesn’t conjure any furniture or architecture, but simply establishes invisible legal boundaries governing every participant. Examples of such boundaries are:

• Witnesses cannot interrupt testimony.
• Defendants cannot approach the Judge without permission.
• Observers cannot interfere without permission.
• Prosecutors and Defence may only question witnesses during appropriate stages.

Procedural Enforcement: The Judge may use the Gavel to maintain proper proceedings. Examples include:

• Contempt of Court – Participants refusing lawful orders may be:
  • physically restrained
  • temporarily silenced
  • forced into Zetsu
  • restricted to answering only direct questions
  • prevented from moving beyond their designated position
  • These penalties exist solely to preserve orderly proceedings, and do not influence the eventual verdict.
• Collective Jurisdiction – The Court derives strength from legitimacy. Participants who knowingly and voluntarily accept both the Trial itself and the declared legal system contribute aura toward maintaining the Courtroom. Acceptance is determined by majority. This allows even extremely powerful Nen users to become subject to the Court provided the majority of participating individuals voluntarily recognize the Court's authority. Conversely, trials imposed entirely through the user's own aura are significantly more taxing.

The Scales of Dike – Evaluation

Once jurisdiction has been established, the Court proceeds to evaluation.

Every meaningful statement made by a participant is automatically transmuted from that participant's aura into a solid metallic scale weight engraved with the exact wording spoken.

Striking a weight reproduces the recorded statement instead of producing the sound of metal.

Evidentiary Weight – Each statement acquires mass according to:

• the speaker's personal conviction
• the statement's relevance to the declared matter
• the speaker's own subconscious confidence in its truthfulness

The scales or weights do not determine truthfulness of the statements. Instead, a person attempting to speak something they themselves internally doubt unconsciously allocates less aura to the resulting weight.

Burden of Proof – The weights may be freely arranged upon the Scales by the Judge, the Plaintiff/Defendant, and legal representatives.

• The Scales themselves never determine guilt, and have no special properties beyond measuring and comparing the mass of the weights.
• Legal reasoning as to the arrangement of weights and interpretation of the scale’s reading remains entirely the Judge's responsibility.

Verdict – Once the Judge reaches a legal conclusion, they formally announce the verdict.

• Only the weights actually relied upon in reaching that decision are gathered together.
• Those weights merge into a single composite Weight representing the Court's legal authority.
• This Weight contains all aura invested in the accepted evidence.

The Sword of Nemesis – Sentence

Once the verdict is reached, the Judge strikes the composite Weight with the Sword, which absorbs all of the aura it contains.

The Judge pronounces the Verdict and the Sentence before thrusting or swinging the sword through the Defendant.

A localized Nen Space surrounding the blade prevents ordinary physical injury, making the blade phase harmlessly through the target’s body – and any defence.

Once the sword completely passes through the Defendant’s body, the Sentence manifests as a chain, materializing upon the portion of the body most appropriate to the punishment.

The chain functions as a Nen Curse, and serves as the enforcement mechanism for the Sentence.

Examples:

Sentence	Chain location	Punishment
Restriction of Movement	Leg	Paralysis, inability to cross designated boundaries, forced return to confinement
Restraining Order	Leg (also on Plaintiff)	Immediate immobilization upon approaching the protected individual, escalating pain proportional to proximity
Suppression of Nen	Limb associated with Nen ability.	Forced Zetsu, inability to activate specific Nen abilities
Confiscation	Dominant hand and object.	Inability to wield specified weapons, or to use designated possessions
Oath of Silence	Throat	Loss of speech,       inability to reveal specified information
Community Service	Both wrists	Severe weakness unless actively performing assigned obligations, aura exhaustion while refusing the sentence
Probation	Torso (Starts invisible)	Punishment activates only after repeated violations. Each breach progressively strengthens future penalties.
Life Imprisonment	Entire body	Overwhelming physical restraint, near-permanent suppression of movement and aura while the sentence remains active

Death Sentence – Reserved only under legal systems explicitly permitting capital punishment and only when supported by sufficient evidentiary burden.

• Rather than killing immediately, the chain forms around the heart.
• The condemned remains alive until intentionally violating the sentence or refusing lawful execution.
• Upon activation, the chain instantaneously consumes the remaining aura sustaining the target's life, resulting in death through Nen exhaustion rather than physical injury.

Sentence Enforcement – The chain itself causes no harm while obeyed. Only deliberate violation activates the punishment specified within the sentence.

Court Martial – Trial by Combat

Court Martial represents expedited legal procedure suitable for battle. Only two formalities are required: to Declare Jurisdiction, and to strike the gavel.

The current opponent automatically becomes the Defendant under the declared Rules of Engagement.

No Courtroom Nen Space is established. The user must personally supply all aura necessary to sustain proceedings.

Martial Evaluation – Every action taken by the user and the opponent while they are holding the Scale of Dike immediately generates an Evidentiary Weight with the user's own aura.

• Rather than recording spoken testimony, these Weights represent legal significance.
• Examples include: initiating combat, violating declared duel rules, repeated aggression, attempted execution of an incapacitated opponent, collateral damage, attacks against non-combatants, use of prohibited weapons, lawful self-defence
• The severity of each Weight depends upon: the declared jurisdiction, the seriousness of the action, repetition, surrounding circumstances.
• The weighs do not have mass or weight, and accumulate on the Scale while the user is holding it.

Like Knuckle's Hakoware, these Weights absorb part of the force of incoming attacks, dispersing some of the impact through the transmuted burden. However, they cannot negate damage entirely; attacks exceeding the capacity of the accumulated Weights still injure the user normally.

Summary Judgment – At any time, the user may declare that sufficient evidence has been gathered. All accumulated Weights merge into a composite Judgment Weight.

• The user can then draw the Sword of Nemesis, which transfers all the accumulated aura into the blade.
• The aura is greatly amplified and concentrated through the ability, greatly enhancing its toughness, sharpness and power, allowing the user to deal a devastating blow to the opponent.
• The Sword's Enhancement scales directly with the accumulated legal burden borne by the opponent. An adversary who repeatedly violates the declared Rules of Engagement strengthens the authority behind the user's eventual counterattack.

Limitations and Conditions

The Hatsu requires three genuine ceremonial implements: the Gavel of Eunomia, Scales of Dike, and Sword of Nemesis. These are ordinary physical objects and are not conjured through Nen. Each must satisfy the user's ceremonial standards to function as a Nen focus.

The Hatsu always follows the same judicial sequence: Jurisdiction → Evaluation → Verdict → Sentence → Enforcement. Later stages cannot be performed unless all previous stages have been properly completed.

The Courtroom Nen Space imposes restrictions equally upon every participant, including the user. The Judge is bound by the declared jurisdiction and cannot arbitrarily ignore or alter its rules once the Trial has begun.

The Court possesses no supernatural ability to determine objective truth, morality or guilt. The Scales measure only the evidentiary burden of claims through the aura invested in them by their speakers.

A Trial becomes significantly stronger when the majority of its participants knowingly and voluntarily accept both the Trial itself and the declared Jurisdiction, contributing their aura toward sustaining the Courtroom. Without such consent, all effects rely solely upon the user's aura reserves.

Nen Curses imposed by the Sword of Nemesis can only be created following a valid Verdict and Sentence reached through the judicial process. The Sword cannot impose a punishment independently of the Court.

Hatsu: Magnum Opus – Lapis Philosophorum

Nen Type: Enhancement, Emission, Transmutation, Manipulation, Conjuration

Magnum Opus is a multi-stage Hatsu modeled after the principles of classical Western alchemy.

The Hatsu combines five Nen types into a unified alchemical process.

Every transmutation proceeds through four sequential stages, each corresponding to one of the classical operations of the Magnum Opus and one Nen affinity.

• The four stages are Nigredo (Manipulation) → Albedo (Conjuration) → Citrinitas (Emission) → Rubedo (Enhancement)
• Transmutation serves as the medium that binds these stages together, allowing the output of one process to become the input of the next.
• By combining the four stages in different sequences, the user can perform a wide variety of alchemical transformations upon matter, energy and chemical substances.
• The Hatsu requires the user to correctly identify the nature of the material undergoing transformation and perform the appropriate sequence of alchemical operations. More complex transmutations require greater understanding, additional preparation and more complete execution of the Great Work.

The Four Stages of the Great Work

• Nigredo – Putrefactio
  • Nen Type: Manipulation
  • Symbolism: Dissolution, decay and reduction to Prima Materia.
  • Nigredo represents the destruction of an object's existing form.
  • Using Manipulation, the user alters the internal state of a target, accelerating decomposition, corrosion, oxidation, fragmentation or other processes that reduce a material to a simpler and more workable state.
  • Nigredo prepares matter for further refinement and is often the first stage of any complete alchemical operation.
• Albedo – Purificatio
  • Nen Type: Conjuration
  • Symbolism: Purification and separation of the essential from the impure.
  • Through Conjuration, the user manifests temporary alchemical media, vessels and reagents that isolate, extract or stabilize desired components while removing unwanted impurities.
  • Albedo may be used to purify substances, separate mixtures, neutralize toxins, preserve materials or prepare reagents required by later stages of the Great Work.
• Citrinitas – Sublimatio
  • Nen Type: Emission
  • Symbolism: Awakening, activation and elevation.
  • Citrinitas projects refined alchemical energy into matter, initiating latent transformations and awakening dormant potential.
  • This stage may activate chemical reactions, initiate crystallization, ignite combustible materials, accelerate curing or otherwise induce transformation within properly prepared substances.
  • Citrinitas represents the transition between preparation and completion.
• Rubedo – Perfectio
  • Nen Type: Enhancement
  • Symbolism: Completion, perfection and fixation.
  • Rubedo strengthens and stabilizes the completed Work.
  • Once the preceding stages have transformed the target into its intended state, Enhancement permanently reinforces the result, increasing its durability, purity, stability and effectiveness while fixing the transformation into its perfected form.
  • Rubedo represents the culmination of the Magnum Opus.

Mercurial Principle

• Nen Type: Transmutation
• Although not itself one of the four stages, Transmutation serves as the philosophical and practical foundation of the Great Work.
• The user's aura is continuously transmuted to emulate the changing qualities required by each stage, allowing seamless transition between Manipulation, Conjuration, Emission and Enhancement.
• Without this continuous adaptation of aura, the four alchemical processes cannot function together as a unified system.
• Transmutation therefore acts as the Mercurial Principle of the Hatsu–the universal medium through which every stage of the Great Work is connected.

Alchemical Formulae

Every application of Magnum Opus follows an alchemical formula composed of one or more stages.

Simple operations may require only a single stage, while more sophisticated transformations demand increasingly complex combinations. Examples include:

• Nigredo → Rubedo: Rapidly weaken a material before reinforcing it into a new form.
• Albedo → Citrinitas: Purify a substance before activating its latent properties.
• Nigredo → Albedo → Citrinitas → Rubedo: Perform a complete Great Work, reducing a material to its Prima Materia before purifying, transforming and perfecting it.

The more complete the Formula, the more stable and refined the final result.

Although not strictly required, the user can employ traditional alchemical symbols and formulas to improve concentration and precision. These include

• Transmutation circles.
• Elemental glyphs.
• Philosophical formulae.
• Planetary seals.
• Hermetic diagrams.

Proper preparation of these instruments significantly improves the efficiency of complex formulas and reduces the likelihood of imperfect transformations.

Applications

Depending upon the Formula employed, Magnum Opus may be used to:

• Corrode or weaken materials.
• Purify liquids and gases.
• Neutralize poisons.
• Preserve organic matter.
• Initiate combustion.
• Accelerate crystallization.
• Harden or reinforce materials.
• Refine metals.
• Stabilize volatile compounds.
• Facilitate complex chemical and material transformations.

Because each Formula must be individually designed and executed, the Hatsu rewards extensive study, experimentation and mastery of alchemical theory.

Limitations

• Every Formula must be executed according to the proper sequence of alchemical stages.
• More complex transformations require proportionally greater aura and preparation.
• Improper sequencing may result in unstable or incomplete Works.
• The user must possess sufficient knowledge of the material undergoing transformation to construct an appropriate Formula.
• The Hatsu cannot violate fundamental physical laws, create matter from nothing or perform transformations for which no valid alchemical process exists.
• Interrupting a Formula before its completion may cause the Work to collapse or produce unpredictable results.

Overall, Magnum Opus is a remarkably versatile Hatsu, capable of reproducing countless alchemical phenomena through the harmonious application of five Nen disciplines... >! And is also an entirely fictitious Hatsu. !<

>!The entirety of the Magnum Opus hatsu is a fabrication and red herring. All of its effects are entirely achieved by the Hatsu below.!<

Hatsu: Alkahest – The Universal Solvent

Nen Type: Transmutation

The user transmutes their aura into a substance with highly specific catalytic or inhibitory chemical properties.

Rather than directly producing chemical substances or forcing transformations of matter, the user's aura functions as a catalyst, lowering or raising the activation barrier of a specific chemical reaction.

• The Hatsu neither creates matter nor violates the physical requirements of chemistry
• All reactants, products and energy requirements must already be physically possible under the surrounding conditions.

Every catalytic property is unique to a particular reaction or narrow family of related reactions.

• Before employing the Hatsu, the user must possess a detailed mechanistic understanding of the desired reaction, including its reactants, products, environmental conditions, competing pathways and the catalytic role required to produce the intended outcome.
• Insufficient understanding results in weak, unstable or unintended reactions.

The user may instead transmute their aura into reaction inhibitors, preventing, slowing or selectively suppressing specific chemical reactions.

• This allows them to preserve materials, halt decomposition, suppress combustion, prevent corrosion or isolate one reaction from competing chemical pathways.

Because the Hatsu manipulates reaction conditions rather than matter itself, its applications are limited only by the user's scientific knowledge and the chemistry physically available within the environment.

Applications – through appropriate catalytic or inhibitory transmutations, the user may:

• Accelerate or suppress oxidation and corrosion.
• Initiate or inhibit combustion.
• Promote or prevent polymerization and curing.
• Accelerate decomposition or preservation.
• Influence crystallization, precipitation and dissolution.
• Facilitate purification and chemical separation.
• Selectively favour desired reaction pathways while suppressing unwanted side reactions.
• Improve industrial, medical or laboratory processes requiring precise catalytic control.

Limitations

• The Hatsu cannot create matter, chemical elements or impossible reactions.
• Every application requires a specific understanding of the underlying chemistry.
• Catalytic aura must interact with the appropriate reactants.
• Large-scale or highly selective reactions require proportionally greater aura expenditure.
• Biological chemistry is exceptionally difficult due to its complexity.
• The user remains vulnerable to the products of any reaction they initiate.