Umbral Mantle is a uncommon Artifact — Equipment card from Shadowmoor (SHM), collector number 267. Current market price: $12.44 (foil $112.11), TCGplayer market prices via Scryfall.
Equipped creature has "{3}, {Q}: This creature gets +2/+2 until end of turn." ({Q} is the untap symbol.) Equip {0}