Sparkling Pool
Land-Island Swamp (Rare)

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

Sparkling Pool enters the battlefield tapped unless you pay 2.

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

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

Eric Chan