Marsh Casualties is a uncommon Sorcery card from Duel Decks: Zendikar vs. Eldrazi (DDP), collector number 54. Current market price: $0.19, TCGplayer market prices via Scryfall.
Kicker {3} (You may pay an additional {3} as you cast this spell.) Creatures target player controls get -1/-1 until end of turn. If this spell was kicked, those creatures get -2/-2 until end of turn instead.