Boiler-Cavern enters the battlefield tapped unless you control an enchantment.
: Add or to your mana pool.
Sacrifice Boiler-Cavern: Add or to your mana pool.
, : Add one mana of any color to your mana pool.
: Add 
or 
to your mana pool. or to your mana pool.
, : Add one mana of any color to your mana pool.
