Aeronaut's Wings is a common Artifact — Equipment card from The Brothers' War (BRO), collector number 231. Current market price: $0.19 (foil $0.21), TCGplayer market prices via Scryfall.
Equipped creature gets +1/+0 and has flying. Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)