(: Add or to your mana pool.)
Flat Catacombs enters the battlefield tapped.
: Prevent the next 1 damage that would be dealt to target creature or player this turn.
, Sacrifice a Swamp: Add to your mana pool.
: Add 
or 
to your mana pool.): Prevent the next 1 damage that would be dealt to target creature or player this turn., Sacrifice a Swamp: Add to your mana pool.
