Thomil, the Destroyer

+2: Create a 2/2 black Zombie creature token.
0: You may sacrifice a creature. If you do, add .
−5: Create a Lord of the Pit token. (It's a 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.