What Lurks in the Depths

Islandwalk
Morph {5}{u}{u}{u} (You may cast this card face down
as a 2/2 creature for {3}. Turn it face up at any time
for its Morph cost.)
When What Lurks in the Depths is turned face up, destroy up to six creatures target opponent controls.
Leviathans can wait for as long as they need before striking at their prey.