Kellan's Lightblades is a common Instant card from Wilds of Eldraine (WOE), collector number 18. Current market price: $0.21 (foil $0.13), TCGplayer market prices via Scryfall.
Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.) Kellan's Lightblades deals 3 damage to target attacking or blocking creature. If this spell was bargained, destroy that creature instead.