Healer's Headdress is a common Artifact — Equipment card from Fifth Dawn (5DN), collector number 129. Current market price: $0.08 (foil $0.35), TCGplayer market prices via Scryfall.
Equipped creature gets +0/+2 and has "{T}: Prevent the next 1 damage that would be dealt to any target this turn." {W}{W}: Attach this Equipment to target creature you control. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)