Meltstrider's Gear is a common Artifact — Equipment card from Edge of Eternities (EOE), collector number 198. Current market price: $0.21 (foil $0.19), TCGplayer market prices via Scryfall.
When this Equipment enters, attach it to target creature you control. Equipped creature gets +2/+1 and has reach. Equip {5} ({5}: Attach to target creature you control. Equip only as a sorcery.)