Dragonskull Sea
Land-Island Swamp (Rare)

(Tap: Add U or B to your mana pool.)

When Dragonskull Sea enters the battlefield, return a land you control to its owner's hand.

2, Tap: Target land becomes a 3/3 black Rat Zombie creature until end of turn. It's still a land.

U, Tap, Sacrifice Dragonskull Sea: Return target creature you control to its owner's hand.

Carl Moeller