The Great Void

The Great Void enters the battlefield tapped
unless you control a Swamp and pay {b}.
{t}: Add {b} or {r}.
{x}, {t}, Sacrifice The Great Void: Add X
mana in any combination of colors to your mana
pool. Create a black and red 1/1 Ogre creature
token with "{t}, Sacrifice a Swamp: Return The
Great Void from your graveyard to your hand."