Graven Wastes
Land-Swamp Mountain (Rare)

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

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

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

2B, Tap: Target player loses 1 life.

John Briclot