Mun-Vora, Cult Mother

+1: Create a 1/1 black child creature token.
-4: Sacrifice all child creature tokens you control, for each creature sacrificed this way, create a 4/4 black Cultist creature token.
-12: Sacrifice all other non-land permanents you control. For each permanent sacrificed this way, create a 7/7 black Demon creature token.