Skemfar Avenger is a rare Creature — Elf Berserker card from Kaldheim Promos (PKHM), collector number 109p. Current market price: $0.49 (foil $1.20), TCGplayer market prices via Scryfall.
Whenever another nontoken Elf or Berserker you control dies, you draw a card and you lose 1 life.