Duskwielder is a common Creature — Elf Berserker card from Kaldheim (KHM), collector number 91. Current market price: $0.18 (foil $0.34), TCGplayer market prices via Scryfall.
Boast — {1}: Target opponent loses 1 life and you gain 1 life. (Activate only if this creature attacked this turn and only once each turn.)