(: Add or to your mana pool.)
Graven Chamber enters the battlefield tapped unless you pay 3 life.
: Graven Chamber becomes a 2/1 red and blue Shaman creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Graven Chamber becomes a 2/1 red and blue Shaman creature until end of turn. It's still a land.
