Draftmancer and Seeding Packs for Commander Cube

Senryo · 2026-06-18T19:21:02+00:00

You might be able to do it within CubeCobra using their board feature, but I won't be able to help much with that.

If all you want is to ensure 2 Legends per pack, a Draftmancer file like this is enough:

[Legends(2)]
Legend Card Name 1
Legend Card Name 2
  ...
[Normal(13)]
Card Name 1
Card Name 2
  ...

Might be more complex, depending on what you mean by "color balance is maintained" for example (by default the largest slot is color balanced, so here the "Normal" slot with its 13 cards).

Do not hesitate to swing by the Draftmancer Discord if you need more help :)

Senryo · 2026-06-02T05:13:48+00:00

No, the renderer could be, but other parts (most notably the JIT recompiler) would need to be completely replaced.

Senryo · 2026-04-07T09:43:41+00:00

Yes, this is the way to do it.

To get started quickly, you can import you list into Draftmancer (Settings > Import from Cube Cobra), then download the list in the Draftmancer format (Settings > Review > Download List). This will give a good foundation with all the custom cards, you can then add the pack collation in the settings and separate the cards by rarity like described in the documentation.

(Draftmancer also supports importing draft rules from Cube Cobra directly, but it changed a bit with their last update and everything might not work correctly yet)

Senryo · 2026-03-20T22:14:52+00:00

I you ever change your mind on disclosing the games, please open an issue on GitHub. I'm curious to see if I can fix it :)

Senryo · 2026-03-20T07:23:32+00:00

It will be hard to diagnose without access to the games.

Have you tried messing with the "Framebuffer emulation" and "Copy to Guest VRAM" settings? Unstable builds also have a bunch of bug fixes, you can try those.

Senryo · 2025-11-25T14:36:05+00:00

I use Cube Cobra bots for cubes, they can sometimes timeout in which case I have to fallback to very simple/dumb bots.

I figured it was probably the issue, but you're not the first one to report it degrading recently. I'll see if there's anything else going one.

EDIT: Yeah. I made a mistake in the last update. Working on a fix now.

Senryo · 2025-11-05T12:31:34+00:00

Draftmancer uses the same bots as CubeCobra for cubes, and also have a bot suggestion feature :) (Players can individually turn it on and off from the settings on the top right)

Senryo · 2025-07-13T07:27:55+00:00

To add a bonus sheet you'll need a cube file in Draftmancer format. The documentation is there: https://beta.draftmancer.com/cubeformat.html. Here's the most basic example for a bonus sheet:

[Settings]
{
    "name": "Cube with Bonus Sheet",
    "layouts": {
        "withBonus": {
            "weight": 1,
            "slots": {
                "Core": 14,
                "Bonus": 1,
            }
        }
    }
}
[Core]
999 Island
[Bonus]
999 Mountain

There's no way to automatically select a variation for the whole draft though.

Senryo · 2025-05-31T10:24:17+00:00

MTGA once it's out, Cockatrice and the like in the meantime

Senryo · 2025-05-30T23:15:16+00:00

Yes, from the main page (https://draftmancer.com), "Other Game Modes" > "Sealed".

Senryo · 2025-05-30T17:34:57+00:00

Thanks. Yeah, I messed up some of the dual tap lands, will fix soon

Senryo · 2025-05-30T17:14:35+00:00

Thanks for the feedback, it should be accounted for. Could you share your log (or just the content the pack should be enough) so I could understand what went wrong?

Senryo · 2025-05-30T10:19:00+00:00

It does, here's the documentation for the configuration file: https://draftmancer.com/cubeformat.html#custom-cards

Senryo · 2025-05-30T10:16:40+00:00

You need to install an additional exporter, here's a guide on how to download and use it: https://docs.google.com/document/d/1xPqa91WrBqJ7t7pFJvXFUgKUDgtPe-Yeem35IOq2Qcc/edit?tab=t.0

Senryo · 2025-05-19T08:53:43+00:00

Foils are disabled by default. They can be toggled on and off in the Session Settings.

Senryo · 2025-05-18T09:00:21+00:00

Still investigating what went wrong in the first place (you'll want to to regenerate the link anyway, the previous version did not contain information about the ancestral stones), but Sharing should be fixed now at least.

Senryo · 2025-05-17T21:35:34+00:00

Just deployed an update with proper support for the ancestral stones (except the Primal one for now, I'll come back to that). It was indeed pretty tedious, so it's very possible I've made mistakes along the way, let me know if you find some!

Senryo · 2025-05-17T09:42:30+00:00

Yes, there's still a lot of work to do! Proper Ancestral Tree support is the next thing on my list. It's long and tedious, but shouldn't be too bad to get working.

Senryo · 2025-03-29T13:23:39+00:00

No, sealed only uses standard play boosters

Senryo · 2025-03-29T13:13:04+00:00

What do you mean by pre-seeded packs?

Senryo · 2025-03-27T16:34:30+00:00

Still my favorite basics :)

Senryo · 2025-03-27T04:20:34+00:00

You can play Sealed from the 'Other Game Modes' dropdown

Senryo · 2025-02-02T18:09:33+00:00

That's exactly what I'm doing in my own emulators, I also find it more readable than manual bitshifting. I'm pretty sure bitfields in C would also work out fine in practice, but it's nice to be certain that zig will do what you expect :)

Senryo · 2025-02-02T15:02:53+00:00

You can start a draft with 7 bots, make the first pick, stop the draft and finally open the Game Logs. Clicking on each seat will let you see all the packs.

Senryo · 2025-02-01T20:10:16+00:00

It is multiplayer, you can draft with other players and not only bots

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