: The Overmind can be your commander.

+1: Consume — Exile a non-zerg creature card from a graveyard, divide X +1/+1 counters among any number of zerg creatures you control, where X is the exiled card's converted mana cost.

-2: Multiply — For each non-token zerg creature you control, create a token that's a copy of it.

-6: Evolve — Sacrifice any number of Zerg creatures, for each creature sacrificed this way, search your library for a zerg creature card with a converted mana cost equal to 1 plus the sacrificed creature's power, put that card onto the battlefield. Then shuffle your library.