Ravaging Blaze is a uncommon Instant card from Commander Masters (CMM), collector number 250. Current market price: $0.23 (foil $0.34), TCGplayer market prices via Scryfall.
Ravaging Blaze deals X damage to target creature. Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, Ravaging Blaze also deals X damage to that creature's controller.