Amorphous Axe is a common Artifact — Equipment card from Modern Horizons (MH1), collector number 219. Current market price: $0.05 (foil $0.28), TCGplayer market prices via Scryfall.
Equipped creature gets +3/+0 and is every creature type. Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)