Caldera Shelter enters the battlefield tapped unless you reveal a Red card from your hand.
, : Add to your mana pool.
: Caldera Shelter becomes a 2/1 red and blue Troll creature until end of turn. It's still a land.
, 
: Add 
to your mana pool., : Add to your mana pool.: Caldera Shelter becomes a 2/1 red and blue Troll creature until end of turn. It's still a land.
