Xrythal, Eldrazi Hive

+2: All creatures you control gain Annihilator 1 until end of turn
-7: Put two 3/4 Eldrazi scion creature tokens onto the battlefield. They have: Sacrifice this creature, do 2 damage to all other players.
-18: Put 1 Xrythal, Ravenous Monster card onto the battlefield from anywhere. This card is tapped until Xrythal, Ravenous Monster leaves the field.