Cinder Strike is a common Sorcery card from Lorwyn Eclipsed (ECL), collector number 131. Current market price: $0.15 (foil $0.26), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, you may blight 1. (You may put a -1/-1 counter on a creature you control.) Cinder Strike deals 2 damage to target creature. It deals 4 damage to that creature instead if this spell's additional cost was paid.