Keel, Barnecleborn Warden

Haste, Menace, Squad {1}{u/b}.

When Keel, Barnecleborn Warden enters the battlefield, all Pirate Creatures you control gain a random Mutation.
Whenever Keel, Barnecleborn Warden attacks and becomes blocked, put two -1/-1 counter on the blocking Creatures.

The sea does not forget its debts... nor does it forgive.