Captivating Shipwreck

Whenever a Creature attacks you, Captivating Shipwreck will gain a Counter.
{3}, remove a counter from Captivating Shipwreck,
{t}: Create a 4/4 Blue Black Merfolk Monstrosity
with Charm and Deathtouch.
Captivating Shipwreck's power is equal to the
amount of Counter it has.