Cheapest priced copy (Ice Age): $0.99 at Card Kingdom, near mint, their price list as of .
Burnt Offering 
Instant · Common · Ice Age · #116
As an additional cost to cast this spell, sacrifice a creature.
Add X mana in any combination of {B} and/or {R}, where X is the sacrificed creature's mana value.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
2 printings · $0.99 to $57.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ice Age | 116 | Common | $0.99 | — |
| Secret Lair Drop | 7047 | Rare | $27.99 | $57.99 |
2 rulings from Wizards of the Coast
- 15 April 2013Players can only respond once this spell has been cast and all its costs have been paid. No one can try to destroy the creature you sacrificed to prevent you from casting this spell.
- 15 April 2013You must sacrifice exactly one creature to cast this spell; you cannot cast it without sacrificing a creature, and you cannot sacrifice additional creatures.