Creol, Unbound Necrotic

+3: Create a 2/2 black zombie creature token, then sacrifice it unless you remove 2 loyalty counters from Creol.
-1: Destroy target creature, then you may create a 2/2 Black zombie creature token. If you do, remove a loyalty counter from Creol.
-12: Destroy all non-zombie creatures, then if you control 15 or more zombies, you win the game.