Lurking Crocodile

Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters with a +1/+1 counter on it.)
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

"Preying on unsuspecting goobers, this crocodile is the only foe to ever best me in a knife fight." —Crocodile Jackson, legendary cowboy