Kerrigan

+1: Evolve Target creature. (The same creature cannot evolve twice)
+1: Kerrigan deals 4 damage to any target. If the target dies, draw a card.
-7: Create 16 Zerglings, 8 Hydralisk, 4 Mutalisks, 2 Ultralisk and 1 Brutalisk. They are all creature tokens with haste. Evolve all your creatures.