Burn from Within is a rare Sorcery card from Shadows over Innistrad (SOI), collector number 148. Current market price: $0.32 (foil $0.69), TCGplayer market prices via Scryfall.
Burn from Within deals X damage to any target. If a creature is dealt damage this way, it loses indestructible until end of turn. If that creature would die this turn, exile it instead.