Glaive of the Guildpact is a uncommon Artifact — Equipment card from Guilds of Ravnica (GRN), collector number 236. Current market price: $0.21 (foil $0.78), TCGplayer market prices via Scryfall.
Equipped creature gets +1/+0 for each Gate you control and has vigilance and menace. (A creature with menace can't be blocked except by two or more creatures.) Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)