Nissa's Judgment is a uncommon Sorcery card from Duel Decks: Elves vs. Inventors (DDU), collector number 21. Current market price: $0.32, TCGplayer market prices via Scryfall.
Support 2. (Put a +1/+1 counter on each of up to two target creatures.) Choose up to one target creature an opponent controls. Each creature you control with a +1/+1 counter on it deals damage equal to its power to that creature.