Archdemon of Unx 
Creature — Demon
Flying, trample At the beginning of your upkeep, sacrifice a non-Zombie creature, then create a 2/2 black Zombie creature token.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL