Olga, Cult Mistress

+2: Create two 1/1 white and black Cultist creature tokens with menace.
-1: You may sacrifice a creature. If you do, create a 3/3 colourless Eldrazi creature token with Annihilator 1.
-10: Exile all creatures you control. Create an X/X colourless Eldrazi creature token with Indestructible and Trample for each card exiled this way.