Archfiend of Ifnir is a rare Creature — Demon card from Amonkhet (AKH), collector number 78. Current market price: $1.52 (foil $4.71), 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.)