Hunter of Eyeblights is a uncommon Creature — Elf Assassin card from Lorwyn (LRW), collector number 119. Current market price: $0.26 (foil $0.95), TCGplayer market prices via Scryfall.
When this creature enters, put a +1/+1 counter on target creature you don't control. {2}{B}, {T}: Destroy target creature with a counter on it.