(: Add or to your mana pool.)
Graven Reef enters the battlefield tapped.
: Graven Reef becomes a 2/1 red and blue Ogre Beast creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Graven Reef becomes a 2/1 red and blue Ogre Beast creature until end of turn. It's still a land.
