(: Add or to your mana pool.)
Rootbound Caldera enters the battlefield tapped unless you pay .
: Rootbound Caldera becomes a 1/1 red and green Squirrel creature with first strike until end of turn. It's still a land.
: Add 
or 
to your mana pool.)
.: Rootbound Caldera becomes a 1/1 red and green Squirrel creature with first strike until end of turn. It's still a land.
