Fierce Retribution is a common Instant card from Innistrad: Crimson Vow (VOW), collector number 13. Current market price: $0.14 (foil $0.19), TCGplayer market prices via Scryfall.
Cleave {5}{W} (You may cast this spell for its cleave cost. If you do, remove the words in square brackets.) Destroy target [attacking] creature.