Oceanheart

When Oceanheart enters the battlefield, sacrifice a land.
{t}: Add {u}{u} to your mana pool.
Devoted {u}{u}{u} - Oceanheart is a 3/3 blue Elemental creature with "{0}: Counter target spell unless its controller pays {3}.
Oceanheart loses all Devoted abilities".
(while active, Oceanheart is not a land)