(: Add or to your mana pool.)
When Blood Cavern enters the battlefield, sacrifice it unless you pay .
, : Target creature gains haste until end of turn.
, , Sacrifice Blood Cavern: Put a -1/-1 counter on target creature.
: Add 
or 
to your mana pool.)., : Target creature gains haste until end of turn., , Sacrifice Blood Cavern: Put a -1/-1 counter on target creature.
