Hello everyone! I like to do this every so often since it gives me good feedback on my cube and I get to see other people's passion projects. If you draft my cube and leave a link to your deck, a couple lines of feedback, and a link to your cube that you want me to draft, I'll draft yours in return and leave the same.

The Link to my cube: Rally the Peasants

It might take me a little to get to everyone depending on how much engagement I get so please be patient. Also feel free to join in and draft other commenters cubes with me.

Edit: Got swamped at work so I haven't been able to slack off as much as I was expecting. I'm gonna slowly be working through all the comments over the next day or two.

If you're not familiar with Cube Cobra, we're an open source cube management website with a very passionate development team. We update the site frequently and make sure we make the changes most requested by the community. You can check it out here: https://cubecobra.com/

I'm very excited to announce a large number of changes that we have been working on the last few months. Myself and a handful of contributors have been enormously productive, as you may have noticed from so many of the UX changes on the site recently!

Some New Stuff

I've added a special "Voucher Card". Similar to "Custom Card" - this is a special cased card. This one allows you to add cards nested inside the voucher. When you draft a voucher, you get all the cards contained in it! Perfect for if you want a buy-one-get-four Squadron Hawk, or perhaps want to allow drafters to pick up a copy of Urza's Tower, Power Plant, and Mine all in one pick.

"At a Glance" is a new feature heavily inspired by the work done by @haganbmj here. The existing analysis tools technically could do everything shown here, but this page makes it much easier to get some simple analysis done.

Point-in-time views have finally arrived. Our data model has always supported this, but I haven't gotten around to implementing this until now. Click on any Cube changelog and now you can look at that Cube as a point-in-time directly after that changelog was applied. Compare it with the current list, maybe export the difference. This one has definitely grown to be one of my go-tos for figuring out all the changes I made to my Cube list over a few weeks (and many small changelogs) that I now need to reflect in the physical copy.

We added a page with some API docs. Hope this makes tinkering on your side project easier!

Draft Simulator is a very large new feature that one of our contributors has been tinkering with over the last few months. A lot of really good engineering work has been put into making this feature a reality - including setting up a system that supports our ML model to run in-browser. This allows us to run simulated bot drafts without creating unreasonable compute costs on our end, allowing us to run several thousand drafts and do some fascinating analysis on the results. It uses the archetype annotation to label clusters, and also uses the Smart Search to find new cards for a specific discovered archetype. There is really a lot going on here, so please try it out and let us know what you think!

ML Features

CubeCobra has maintained a fairly sophisticated machine learning model that has evolved a lot over the years. This model powers our draftbots, card synergy (seen on card pages), bot deckbuilder, and also the Smart Search (previously called recommender). We have just published a new version of the model, freshly trained! This model architecture has been tweaked so the draftbots now have full context of the Cube that is being drafted. The deckbuilder has been overhauled, but the model is the same - we only changed the algorithm that uses the model. The results look quite good, but we're still keeping an eye out for edge cases and anomalies and will adjust as needed.

As I mentioned earlier, the Recommender has now been rebranded as Smart Search. I believe this feature has suffered from bad branding, and a UX that doesn't encourage users to use it in a useful way. This feature isn't meant to just give you cards to add to your Cube - it is a way to search for cards and use the context of the Cube to sort the cards in a more meaningful way. When I explore cards on Scryfall, I would often use "EDHRec Rank" sorting, which is fine, but not great for Cube. Using the same queries in Smart Search yields more fruitful results, in my experience.

I've created a new development tool I call "Archetype Annotater". Similar to the Lucky Paper Cube Map, it projects all decks drafted on Cobra, and then clusters them. I've tuned the tool to result in around 50 clusters, of which I've hand annotated. Now your drafts (and the bot seats) will automatically have more meaningful names, by projecting the deck into that same space and figuring out which cluster it belongs to.

UI Changes

We have restructured the overall navigation of the site. Outside of Cube pages, there are four main sections: Landing, Explore, Resources, and Help. Resources is brand new - I do think CubeCobra should be a hub where we link and promote other projects in the Cube space. If you have or use a project you feel is appropriate to be listed there, please let me know and I will consider adding it! Help pages are a consolidation of other miscellaneous pages, now bundled into a more organized hub. These pages now feature splash images using some of the artwork I have commissioned over the years - it feels very satisfying to put those gorgeous (imo) pieces in a place they can be appreciated by more people.

The home page has mostly been simplified. This refers to both the logged out and logged in variants. I've removed sections for recent drafts and content. A search component has been added that can be toggled between searching for Cubes, Cards, and Packages - with some example queries. I believe that putting this here will lead to more organic discovery of features.

Packages have been a feature on the site for many years, but for most of that time have been clunky and/or broken. I've now promoted packages to be a front and center entity alongside Cubes. You can now quickly create a new package, view your packages, and view the packages you've liked. When you're editing a Cube, you can easily pull up those lists of packages and add them directly to your Cube. Packages have been moved under the explore menu. Of note — packages are immutable by design. Similar philosophy to sites like Twitter where we don't want to allow packages with a lot of likes to be modified.

User profile pages have been overhauled. Packages have been added as a new tab, and now it is easy to view a user's follows, followers, liked cubes, and liked packages. The Cube and deck preview component has been revised, I think it looks a little sleeker now. "Account Information" has been rebranded as "Settings" and also has an overhauled UI.

I've streamlined the new user workflow. Cubes can now be created with a simple click. When you open an empty Cube, you are now presented with a getting started guide, with a couple options for adding cards into the Cube. I think we have underestimated the gap that non-Cube designers have to experience to actually start designing a Cube. My hope is that these changes help bridge that gap, and make Cube curation more accessible and easier to get started with.

Content

The changes here are the ones I'm probably the least confident about, but these feelings have been growing for several years now. When CubeCobra was in its infancy, I looked towards deck building and other Magic websites for inspiration on what features users may want. I recognized that Cube designers want a place to share their thoughts, and may appreciate reading about other designers' thoughts. That is why I created the content sections of the site. In hindsight, I see this as a mistake. I think it is more important that CubeCobra focuses on its core product, being a Cube management platform, and other platforms dedicated for content sharing are where that happens.

With this update, I will no longer be publishing new content on Cube Cobra. I will leave registered podcasts up on the Resources page, and I am happy to add new Cube related podcasts there as well. All content will still be accessible in our content archive, so nothing is lost. I hope that deciding to remove the suite of features will allow us to focus more on the stuff that is actually essential to the platform.

New Features

• New API Documentation page (/apidocs) — reference for all public API endpoints
• New "Voucher" card type — contains a list of other cards; when drafted it expands into its contained cards instead of being picked directly. Supports custom names, is:voucher filter, and CSV import/export
• New "At a Glance" analysis page — dashboard of key stats, pricing, mana curve, and distribution charts
• New Cubes get a random art crop from a curated card set instead of always Doubling Cube
• Changelog entries are now clickable, each linking to a detail page with the full changelog
• Point-in-time Cube list view on changelog detail pages — same view controls (table, visual spoiler, curve, stacks), filter, sort, and display sidebar as the main list, boards kept distinct (mainboard, maybeboard)
• "Download Point in Time Cube" on changelog detail pages — reconstructs the historical Cube as CSV
• "Compare Point in Time Cube with Present" — side-by-side historical vs current
• Export button on all compare pages (regular and PIT) — text file with In Both, Only in Base, Only in Comparison
• New First Year group sort (year a card was first printed)
• New Keywords group sort (group by keyword, e.g. Flying, Trample)
• New year:/firstyear:/fy: filter for first print year (e.g. year>2000, fy<=1995)
• New kw:/keyword:/keywords: filter by keyword (e.g. kw:flying, keywords>3)
• New is:standard filter — first printed in a standard expansion
• New is:supplemental filter — first printed in a supplemental product
• New board:/board= filter (e.g. board=mainboard, board=basics) — matches cards by which board they're in; custom draft format slots now use it (default board=mainboard, or draw from multiple boards like ci=r (board=mainboard or board=modulex)), replacing the per-slot board dropdown
• Improved bot deckbuilding — no changes to model but changed how we are using it
• game:arena/game:paper/game:mtgo now match any printing ever available in that game, not just the current printing
• New game:is-arena/game:is-paper/game:is-mtgo filter — only the specific printing's availability (the old strict behavior)
• Adding a collaborator now notifies that user
• Added date_last_updated to Cube exports
• New "Use Base Card Data" display option — sorts/filters use a card's original printed attributes (CMC, colors, color category, type, rarity, name) instead of overrides
• New "Disable Follow Notifications" setting — suppress notifications when users follow your Cube or you
• Bot decks get meaningful archetype names (e.g. "UW Control", "RG Aggro") from hand annotated ML cluster centers instead of generic labels
• Deck naming is back — set your own deck name in the deckbuilder; blank auto-generates a cluster-based archetype name
• New Draft Simulator (in the Cube nav) — runs hundreds of full drafts against the ML bots in your browser, then shows per-card pick stats (average pick, wheel rate, draft rating vs. Elo), the archetypes that emerged with color-pair breakdown, a draft map, and the simulated bot decks and pools; choose drafts/seats, filter and sort the stats, and drill into any archetype or deck
• Streamlined Cube creation — "Create A New Cube" creates it instantly (named <username>'s New Cube) and lands you on its list page, no modal; rename from the Cube hero anytime
• Edit sidebar expanded by default on desktop when viewing the list page of an empty Cube you own
• New "Welcome to your new Cube!" onboarding card on an empty owned Cube's list page, pointing to the edit sidebar, packages, or the seed crystal generator
• New "Seed Crystal" generator — bootstrap a partial or complete Cube from one seed card using the draftbot and smart search models
• Renamed the "Recommender" Analysis tab to "Smart Search" and rebuilt it to match CubeCobra's search UX: inline filter, paginated grid of card images, same context-aware sort. Core Cards panel, maybeboard toggle, and show-images checkbox removed
• Brought back "Save as Default Sort" in the display sidebar — saves the current sort as the active view's default
• New help blurbs at the bottom of the display and edit sidebars (links to Boards/Views settings and Smart Search)
• Edit sidebar's Board dropdown defaults to the first board in the current view (and follows view switches) instead of always Mainboard
• Richer link previews for shared blog posts and comments — comment links show the comment text and poster avatar; blog links show an excerpt plus a changelist summary with the Cube's image
• Redesigned landing page and dashboard with a new hero — unified search across cubes, cards, and packages with suggestion chips, and a Featured Cubes marquee. Landing is hero-only; the dashboard sits below with Daily P1P1 and Your Cubes split 50/50 and the activity feed under Daily P1P1 (standalone "Latest Content" and "Featured Cubes" cards removed)
• Redesigned Cube preview tiles — cover image fills the tile, with name, category tags, follower/card counts, and owner overlaid on a bottom gradient
• New Resources page at /resources (top nav) — community tools, the content archive (articles, videos, podcasts), Cube communities, Hedron Network, the Cube Map, and latest podcasts
• Restructured top nav and footer — Home is top-level, Explore is a richer sectioned dropdown with a Search Cubes shortcut, a top-level Resources entry, separate Login/Register for logged-out users; navbar Cube search and the Explore Cubes page removed; footer reorganized with Popular / Recently Updated / Recently Drafted links
• Redesigned Cube Search, Card Search, and Packages pages with the Landing/Dashboard hero treatment; Top Cards consolidated into Search Cards with a Card Images / Info Rows toggle (sortable table: Cost, Type, Elo, Total Picks, Cube Count)
• Packages are created on a dedicated page; users get a Packages profile tab; navbar gains a + quick-create dropdown and a Your Packages menu
• New Help hub at /help with a shared layout — Filter Syntax, Markdown Guide, API Docs, Card Updates, Contact, and Donate share a hero with a sticky pill nav
• Liked Packages — upvoting a package also records a like (browse Packages You've Liked). Cube edit sidebar gains "Add Package" (Import): a modal with your packages and liked packages dropdowns that adds the package's cards to your changelist
• Liked Cubes page — browsable list of Cubes you've liked, previously followed (also viewable for any user)
• Followers and Following pages — each its own page with the new profile layout, replacing /user/social
• Redesigned user profile pages — left side card (avatar, name, supporter badges, follower/following/liked-cubes/liked-packages count links, Edit Profile or Follow/Report, markdown bio); right-side floating tabs (Cubes/Packages/Drafts/Blog) across all profile sub-pages including Liked and Followers/Following. "Decks" tab renamed "Drafts"
• Supporter badges — active Patreon supporters get an animated "Patron" pill; tiered supporters (Cobra Hatchling, Coiling Oracle, Lotus Cobra) get a tier-coloured pill that shimmers on hover
• Settings page restyled like the Help hub — root shows section tiles (Profile, Change Password, Update Email, Display Preferences, Patreon Integration, Delete Account); picking one collapses to left pill buttons with content on the right
• Your Cubes and Packages navbar dropdowns each gain a "Liked" link
• Username menu cleanup — "Your Profile" → Profile, "Account Information" → Settings, redundant "Followed and Followers" link removed (moved to the new Followers/Following pages)
• Drafts of your cubes get their own full-width page (from the Your Cubes dropdown) with a responsive grid up to 6 per row
• Dashboard activity feed loads asynchronously after the page, uses "Show More" instead of pagination, and its empty state links to Popular Cubes; non-supporters get a banner ad every 10 posts
• Reorganized the "Your Stuff" / mobile cubes dropdown into Your Cubes, Actions (create Cube/package), and More (View all, Liked, Drafts, View all packages, Liked packages)
• Pin your own Cubes — a Pin toggle replaces Like on Cubes you own; pinned Cubes sort to the top of the Your Cubes dropdown, your dashboard, and your profile's Cubes page

Bug Fixes

• Fixed deck data exports containing invalid -1 card values — exports now exclude cards that couldn't be mapped to valid IDs
• Fixed quarterly data exports including private/unlisted cubes — Cube and deck export jobs now only export public Cubes
• Fixed blog posts from private/unlisted Cubes leaking into follower feeds — blog posts, commits, package adds, and bulk imports for non-public Cubes no longer publish feed items
• Fixed unlisted-Cube blog posts visible on user blog pages and dashboard feeds — display filtering now excludes private and unlisted (was private only)
• Fixed blog pagination (getmoreblogsbycube) missing a visibility check — now verifies the Cube exists and is viewable
• Fixed Cube JSON API (/cube/api/cubeJSON/:id) using stale Cube.defaultSorts — now returns all boards and applies the standard default sort (Color Category → Types-Multicolor → Mana Value → Alphabetical)
• Fixed moving cards between boards keeping the card on the same board — the target board selector wasn't resetting when switching between cards on different boards
• Fixed "Cannot set properties of undefined (setting 'markedForDelete')" crash from stale localStorage changes referencing missing card indices — now treated as a version mismatch via the existing recovery flow
• Fixed sample pack/P1P1 generation failing for custom draft formats referencing non-mainboard boards — pack generation now passes all boards to the draft engine
• Fixed view-level defaultSorts not applied on page load (only Cube-level sorts were)
• Fixed bookmarked URLs with query params (view, sort, filters) not applied on load — the view-defaults effect was also firing on initial mount and overwriting URL values
• Fixed Scunthorpe problem in the profanity filter — spam/marketing terms use word-boundary matching while slurs use substring matching, so words like "senft" no longer falsely trigger
• Fixed list view selections persisting after removing cards — checked state used stale indices after "Edit Selected" → "Remove all" → "Save Changes"
• Improved draft creation errors — now distinguish no cards in a board, running out of cards mid-draft (with count and suggestions), and remaining cards not matching a slot filter (with filter text and counts)
• Improved date display — within 7 days shows relative time ("3 hours ago"), older shows absolute ("Feb 7, 2026")
• Fixed Cube card count not updating in the hero as mainboard changes were saved
• Fixed selecting cards with accented characters (e.g. Lórien) when adding to a draft record
• Fixed deckbuild land/non-land count settings not being saved
• Moved bot deckbuilding to the client with a progress bar — instead of one long server request that could time out, the client makes ~31 small incremental ML calls (1 batch build + ~30 draft steps) with a live percentage/step counter
• Improved draft naming durability for unknown/malformed cards — naming skips missing card references instead of throwing during finish/update
• Fixed invalid-card image fallback pointing to an unreachable external URL — now uses the local default card image
• Fixed pick-by-pick breakdown collapsing duplicate cards when "collapse duplicates" is enabled
• Fixed board display order in Cube list views not respecting view settings
• Right Sidebar inline position now respected when adjusting Cube Table and Stacks layouts
• Fixed "Disable Clone Notifications" Cube setting not persisting
• Fixed edit/remove card only searching the filtered list — name lookup now searches the full unfiltered list
• Fixed card edits inflating +/- counts — edited cards now show as a separate count with a wrench icon (e.g. "+5, -3, 🔧2") in the pending panel and committed changelogs
• Fixed committing large changelogs (e.g. bulk uploads) timing out
• Improved performance of saving large updates — card data fetched in a single batch instead of one-at-a-time
• Fixed newly-released cards missing "Drafted With" and other cross-card data after being added
• Fixed Top Cards deduping rows by card name — distinct cards sharing a name (e.g. Everythingamajig) appear separately, while alternate-name printings of one card (e.g. omenpath) collapse into one
• Fixed Card Search infinite spinner on first load with no filter
• Fixed stale "0 results" while a fetch was in flight — now shows "Searching…"
• Fixed open dropdown nav menus going white-on-white in light mode on transparent-navbar hero pages
• Fixed automatic deck archetype names not applied in production — cluster-center and annotation data files were missing from production deploys, so decks fell back to a blank archetype
• Fixed draftbots making worse picks than the pick-by-pick breakdown for the same state — the live path sent raw oracle IDs while the breakdown sent normalized ones; substitution fallbacks are now skipped when the card is already known to the model, fixing stale pointers from the previous model

https://preview.redd.it/g4k48tgwtd2h1.png?width=405&format=png&auto=webp&s=ec8e809a7cf4420c626bd3e7b5f26c127f246c93

This is a screenshot I took from the 100 Conjurers of Ugin Cube, I'm building a pseudo-desert cube and I need 100 mountains, is there any way to replicate the card being multiplied by 100 instead of adding the card 100 times? Thank you everyone in advance.

Hey everyone,
Looking to put together a competitive 8-man cube draft group here in Seattle. The venue will be **Stoup Brewing** in capital hill.

**Example** **Buy-in:** $200 cash upon arrival, prize cards are already purchased.
**Example Prize Support:** 1st Place takes a **Gaea's Cradle** (LP). 2nd Place takes a real **Revised Dual Land** (e.g., Underground Sea/Volcanic Island depending on final pool).
**Format:** 8-player draft, competitive Swiss or single-elimination bracket (timed rounds).
I’d be the first player and am looking for **7 more** who want to play for serious stakes. I am entirely open to collaborating with the final group on adjusting the exact buy-in amount ($50-300 range) and voting on which specific Reserved List or High end cards you guys want to target for the prize pool.

**DM me if you're interested.**

I recently got my hands on a booster tutor and Im very excited to add it to my cube because it's just such a fun card. The question though is, assuming I use extra cube packs, how many extra packs should I keep left over to booster tutor from? With my current set up, It works out so that I have exactly one extra pack but that doesnt seen like enough. I assume I probably need atleast three. Maybe more? I should note that the cube in question is a mono black cube, so the booster tutor is going to be incredibly powerful, but it also means that you probably wont be casting it multiple times per game. In a three round tournament, three feels like enough, but what do you think?

Good morning Cubers! On the newest episode of Cuberviews, I am excited to be joined by Jane to discuss all things the Ball Pit! We go over topics like the gameplay tempo considerations surrounding when to play a card as a chromatic sphere, how the multiple rule changes of the cube all blend together coherently, and more. I hope you like the episode!

https://cubecobra.com/cube/about/ballpit?view=primer

https://open.spotify.com/episode/2PWGejWb6NjcStkPAIluLz?si=f9d82954dc1f4cb4

I am still in my first year of actually playing Magic, and I have fallen head first into building cubes. While learning about the history Magic games, Tron has interested me and I want to consider what does a cube built around Tron look like.

The cube would be a spin on a desert cube. All basic lands must be drafted, but each player gets 4 copies of the Tron lands to use (I think 4 should be enough but really I would give as many as people want). I am just beginning my research into what other people have done in this space but I would love help from people who are more experienced in the hobby. Links to other Tron Cube, constructed Tron lists, card recommendations would all be welcome.

Here's my situation:

I have a lot of cards in boxes, organized by set.

I have three or four cubes I want to start building.

Some cards have been printed in multiple sets (big if true).

I want to make a list of the cards in a given cube, and all the sets that they've been printed in, to make it easier to go through old boxes. A local shop has binders organized by set as well. If I can go to, say, the UMA binder for 8 cards and not have to go to AVR, AKH, M13, M12, ZEN, AND JOU, then that would be lovely.

I COULD go to Scryfall for each and every one of these, but I didn't know if CubeCobra or someone else had this data in a database that I could pull from instead.

I’m currently working on a new cube where players randomly choose a card from a pool of 8 before the draft. That card starts on the battlefield and is meant to loosely guide their draft and reward players if they build around it, but not punishing them if they ignore it.

Tell me about any turn 0 cards or rules you’ve tried in your cubes. What worked/what didn’t and any suggestions you may have.

Curious people’s thoughts, had a long discussion with some friends about the value of [[Cauldron of Essence]]. Personally I think it would be fringe playable at best in a powered cube, but I also love green black sacrifice shenanigans so I’m highly tempted to run it. It’s such a nice signpost two color card but seems just short of the optimal power level.

Sorcery only seriously limits the power of the card, activating the ability at instant speed would kick the feet out from under most if not all removal and make the card a monster to deal with.

I've been mulling over the idea of making a jumpstart cube that has a bunch of modern combo packages or archetypes as the packs that you would slap together to make a deck. Instead of two 20 card packs I think I would do 15 card packs and have players merge 3 packs together and cut 5 cards. If I was able to scrape together 48 themes I could accommodate 8 players drafting 6 of these packs to build from.

Part of the inspiration here has been my inability to get my modern cube to feel like constructed modern. Im currently of the opinion that it is impossible to get a draft cube to feel like a constructed format because of how difficult it is to get the necessary duplicates needed to make a deck function. Say I wanted to get a combo working with pestermite - kiki - splinter twin. That could be a pack! Im also considering having the land base be separate so there would be basic land station and a nonbasic station per player that they can build with that will have 4 copies of a bunch of modern staple land cycles. This is gonna have to be very proxy heavy but I think it could be done!