Commander Mystery Booster Draft Event

BB Draft Rules and Event Details How Commander Draft Works in Mystery Booster Commander Edition MBC is a Commander Draft set, which means the format is the mechanic. You open three 20-card packs and take two cards per pick, passing left, then right, then left again. That leaves you with a 60-card pool, and from it (plus any basic lands you want) you build a deck of at least 60 cards including your commander.

Two deckbuilding rules change from constructed Commander. Your deck still has to fit inside your commander's colour identity, but it is no longer singleton: if you drafted three copies of the same removal spell, all three go in. Taking multiples is a real strategy here, not a mistake.

The second change is the partner exception. In an MBC draft, any eligible commander with one or fewer colours in its identity that doesn't already have partner is treated…