Merrick, Shark Current

+1: Create a 2/2 blue Shark creature token with Islandwalk.
-X: Merrick deals X damage divided as you choose to any number of target creatures, then put X +1/+1 counters on target Shark creature you control.
-8: Destroy all non-Shark creatures, then create that many 2/2 blue Shark creature tokens with Islandwalk.