Ulamog, World Eater

X: Exile X target permanents. Replace them with 1/1 eldrazi scion creature tokens. They have "sacrifice this creature: add 1 to your mana pool."
-2: Destroy up to 5 target creatures target player controls. Create X 3/3 eldrazi creature tokens, where X is the amount of creatures destroyed.
-3: Ulamog, World Eater becomes a 10/10 devoid creature with indestructible, haste, trample, and annihilator 2 until end of turn.