Squire's Lightblade is a common Artifact — Equipment card from Edge of Eternities (EOE), collector number 36. Current market price: $0.16 (foil $0.26), TCGplayer market prices via Scryfall.
Flash When this Equipment enters, attach it to target creature you control. That creature gains first strike until end of turn. Equipped creature gets +1/+0. Equip {3}