Coastal Mire
Land-Island Swamp (Rare)

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

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

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

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

Allan Avon