Tomb Creek
Land-Island Swamp (Rare)

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

When Tomb Creek enters the battlefield, sacrifice it unless you pay B.

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

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

Mark Pollack