"Demonfire" is a spell from the Magic: The Gathering Dissension set, classified as an Unknown rarity card. Currently valued at $0.85, it showcases a unique mechanic that deals damage based on the number of spells cast during a turn. Its appeal lies in its strategic potential within various deck builds, making it a noteworthy addition for collectors and players alike. The market reflects its niche value, with limited sales data indicating steady interest.