Burnt Offering | Magic: The Gathering
Formats Burnt Offering is Legal in
Official Oracle Text for Burnt Offering
Add X mana in any combination of and/or to your mana pool, where X is the sacrificed creature's converted mana cost.
—Lim-Dûl, the Necromancer
Official Rulings for Burnt Offering
4/15/2013 : Players 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.