When Saltcrusted Necropolis enters the battlefield, sacrifice it unless you pay .
: Add or to your mana pool.
Sacrifice Saltcrusted Necropolis: Add or to your mana pool.
: Prevent the next 1 damage that would be dealt to target creature this turn.
.
: Add or 
to your mana pool. or to your mana pool.: Prevent the next 1 damage that would be dealt to target creature this turn.
