(: Add or to your mana pool.)
Grave Karoo enters the battlefield tapped unless you sacrifice a creature.
: Grave Karoo becomes a 2/1 black and white Specter Wizard creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Grave Karoo becomes a 2/1 black and white Specter Wizard creature until end of turn. It's still a land.
