Burning Oil is a uncommon Instant card from Dark Ascension (DKA), collector number 84. Current market price: $0.20 (foil $0.38), TCGplayer market prices via Scryfall.
Burning Oil deals 3 damage to target attacking or blocking creature. Flashback {3}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)