My first ever Twobert design, a 180-card Cube in which all colors have a seeded 23-card "deck" with a functional mana curve. The draft process shakes all those decks up together and adds some gold cards and mana-fixing to provide a surprisingly replayable and fun draft environment! For expanded thoughts on this Cube, check out my article on the original design from 2020:
https://articles.starcitygames.com/magic-the-gathering/premium/the-proper-way-to-do-two-player-cube-drafts/

And here's a YouTube vid on the environment:
https://www.youtube.com/watch?v=p14lc3P1VPE&t=8s

The cards in the "maybeboard" constitute a Bonus Sheet to be drafted after the main Cube where each player will draft three additional cards with the goal being to make decks function a little more consistently. You can read more on this concept here:

https://articles.starcitygames.com/magic-the-gathering/how-bonus-sheets-play-in-my-twobert-magic-cubes/