(: Add or to your mana pool.)
When Hollow Castle enters the battlefield, sacrifice it unless you pay .
, Sacrifice a Swamp: Add to your mana pool.
, , Sacrifice Hollow Castle: Prevent all combat damage that would be dealt this turn.
: Add 
or 
to your mana pool.)., Sacrifice a Swamp: Add to your mana pool., , Sacrifice Hollow Castle: Prevent all combat damage that would be dealt this turn.
