Haunted Cloak is a uncommon Artifact — Equipment card from Shadows over Innistrad (SOI), collector number 257. Current market price: $0.36 (foil $2.57), TCGplayer market prices via Scryfall.
Equipped creature has vigilance, trample, and haste. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)