name: Sacrifice
originalText: Sacrifice one of your creatures to add to your mana pool a number of black mana equal to that creature's casting cost.
printings: 2ED, 30A, 3ED, CED, CEI, FBB, LEA, LEB, SPG, SUM
text: As an additional cost to cast this spell, sacrifice a creature.
  Add an amount of {B} equal to the sacrificed creature's mana value.
type: Instant