Twinblade Slasher is a uncommon Creature — Elf Warrior card from Eventide (EVE), collector number 79. Current market price: $0.32 (foil $1.27), TCGplayer market prices via Scryfall.
Wither (This deals damage to creatures in the form of -1/-1 counters.) {1}{G}: This creature gets +2/+2 until end of turn. Activate only once each turn.