Kerrigan, Zerg Queen

+2: Create 3 0/1 egg tokens. At the beginning of your next upkeep, mutate them into 5/5 roach tokens.
-4: Destroy up to 2 non-zerg non-land permanents.
-12: Create a 8/8 black Leviathan creature token, 5 2/2 black Zergling creature tokens and 2 3/3 black roach creature tokens.