This is a Commander cube.
It is intended to be drafted in a 4-person pod.
Each player starts with 4 packs of 15 cards each.
Starting life: 30
No commander damage.
Deck size: 49 cards +1 commander (I recommend 18-19 lands.)

After the draft, choose 3 colors. This is "your commander's color identity" for all deck-building and gameplay purposes. Your commander can be any commander from your draft pool that is fully permissible within your deck's color identity.

Card-Specific Notes:
Booster Tutor - use 15 random cards from the cube as the "sealed Magic booster pack"
Command the Chaff - the caster doesn't get to look at the opponents sideboard until the spell has resolved
Contract from Below - now reads: "Discard your hand, exile the top card of your library, then draw seven cards."
Power Play and Backup Plan - these cards start in your sideboard and don't count towards your deck size
Volatile Chimera - the exiled cards start the game in your sideboard, don't count towards your deck size, and aren't restricted by color identity