Thomil, the Destroyer

[+2]: Create a 2/2 black Zombie creature token.

[0]: You may sacrifice a creature. If you do, add BBB.

[−5]: Create a Lord of the Pit token. (It's a 4BBB 7/7 Demon creature with flying, trample, and "At the beginning of your upkeep, sacrifice another creature. If you can't, this token deals 7 damage to you.")

Thomil, the Destroyer can be your commander.