Astrid, Agent of the End

+2: Create a 1/1 Eldrazi Spawn token for every colorless creature you control, put +3/+1 on a colorless creature you control.
+1: Colorless creatures you control gain Annihilator 1 until the end of turn.
-13: Search your library for a colorless creature with converted mana cost of 6 or more, reveal it and add it to your hand.