u/BaconDragon-

Cursed Technique : "Chains of Twin Stars"

Description :
A user with this technique can pair to objects into a state resembling binary star system. To bind an object, the user casts a ghost like chain from his palm (max distance 15m) which needs to hit the object, the next throw will assign the second object.
Once bind, a central symmetry will be established with the origin being the middle between the two objects. If one object is in motion, the other must follow with respect to the central point. Each link has a "durability", the more force is applied to the system, the weaker will be the link, at some point it will rupture and free the two objects. The user can sever any link, any time.

Notes :
No property is shared between the two objects, if one object weights 10kg, the other 1kg, after binding the two will not share mass.
The mass and volume difference between two object matters, technically the user can bind for example, a golf ball and the Earth but the CE requirement is so absurdly high its considered impossible.
The user can pair himself.

Reversed Cursed Technique : "Single Orbit"

Description :
Instead of creating a binary system, RCT forces one object to orbit around another on a fixed radius, set by the original distance between the two. A force will be applied to the object forcing it to stay in the orbit, this force becomes stronger, the further the object is from the supposed orbit, this force has a limit, at some point with enough effort the link can be severed.

Notes :
Same as with CT, the mass and volume difference matters.

Domain Expansion : "Prison of Endless Stars"

Description :
Insides of the domain resemble a planetarium, the sure hit effect is the ability to assign a pair to every object inside the domain, with full control over the symmetry (radius, point)

Maximum Technique : "Third Star"

Description :
The maximum technique allows to add a third object into a system, forcing the objects into a triple system.

Cursed Technique : "Equivalent Subdivision"

Description :
A user with this technique can subdivide any surface with a finite volume into two parts of equal volume. If any forces are applied on the object before subdivision, they will carry to its children and will be equally split among them.
Technically, there exists no limit to the amount of subdivision the user can perform on an object, however every following subdivision will require twice more CE than its predecessor.

Notes :
The CE required to divide an object scales with its original volume. Density and mass do not play any role.
Theoretically, a user with this CT can split the earth, however this is completely impossible due to the absurd CE requirement.
An average grade 1-2 sorcerer would have enough CE to split at maximum a huge skyscraper. If we take Yuta as the CE output maximum, he could split at maximum a medium sized mountain wasting all his CE on it.

Reversed Cursed Technique : "Outer Volume Projection"

Description :
Instead of splitting the object, it allows the user to split the space around it, equal to the original object's volume.
A divided space will extend the distance between two points, as it will form two new intermediate points between them, essentially this slows down the object and its children. External forces can be applied on the object, to redirect it for example.

Notes :
This is the same principle as Gojo's Infinity. However, unlike Gojo's infinity, the division CE scale is still present, so while it *can* act like infinity, this would require an infinite amount of CE to achieve.

Domain Expansion : "Illusory Space of Absolute Zero"

Description :
The sure-hit effect of the domain is the RCT effect, its applied to every object an infinite amount of times. Infinitely dividing the space inside the domain, forcing everything to be infinitely far from each other. Essentially rending everything motionless except the user itself.

Notes :
I originally see this domain as open, similar to Sukuna's, but his domain is an exception, so lets stick the the closed version (open domain distance would be 75m in diameter). Closed domain diameter : 20 meters.
Inner domain walls are made of what looks like shattered glass.
The atmosphere inside is not divided, bcz just like any gas, as it does not have a finite volume.

Maximum Technique : "Limitless Subdivision"

Description :
Allows the user to infinitely subdivide a single object within the users field of vision applying both the CT and RCT at the same time for a huge CE cost. This technique allows one to split the atom, if the right element is chosen (for example Lead), the user can create a literal mini-nuke.

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That's it, hope you liked it. First CT kinda nervous
Edit : typo

CE: Chains of Twin Stars