Windbrisk Wastes
Land-Plains Swamp (Rare)

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

When Windbrisk Wastes enters the battlefield, sacrifice it unless you pay B.

W, Tap, Sacrifice Windbrisk Wastes: Prevent all combat damage that would be dealt this turn.

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

Greg Tedin