Drach'Nyen is a rare Legendary Artifact — Equipment card from Warhammer 40,000 Commander (40K), collector number 117. Current market price: $0.39, TCGplayer market prices via Scryfall.
Echo of the First Murder — When Drach'Nyen enters, exile up to one target creature. Daemon Sword — Equipped creature has menace and gets +X/+0, where X is the exiled card's power. Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)