Archfiend of Ifnir is a rare Creature — Demon card from Aetherdrift Commander (DRC), collector number 86. Current market price: $0.35, TCGplayer market prices via Scryfall.
Flying Whenever you cycle or discard another card, put a -1/-1 counter on each creature your opponents control. Cycling {2} ({2}, Discard this card: Draw a card.)