Cathulu, Water Demon

+2: create a fish 1/1 Token Creature with "When this creature dies, create two 1/1 fish creature tokens.
-4: Until end of turn, this card becomes a 10/10 with indestructible.
-18: Create a 12/12 Kraken Token Creature with "When this creature dies, create Two 12/12 Megladon Token creatures.