Malefic Scythe is a uncommon Artifact — Equipment card from Core Set 2021 (M21), collector number 112. Current market price: $0.14 (foil $0.26), TCGplayer market prices via Scryfall.
This Equipment enters with a soul counter on it. Equipped creature gets +1/+1 for each soul counter on this Equipment. Whenever equipped creature dies, put a soul counter on this Equipment. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)