Crater Cairns enters the battlefield tapped unless you sacrifice a Rat.
, : Add to your mana pool.
: Crater Cairns becomes a 1/1 black and red Orc creature with first strike until end of turn. It's still a land.
, 
: Add 
to your mana pool., : Add to your mana pool.
: Crater Cairns becomes a 1/1 black and red Orc creature with first strike until end of turn. It's still a land.
