Fires of Undeath is a common Instant card from Dark Ascension (DKA), collector number 88. Current market price: $0.14 (foil $0.37), TCGplayer market prices via Scryfall.
Fires of Undeath deals 2 damage to any target. Flashback {5}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)