Paladin's Shield is a common Artifact — Equipment card from Adventures in the Forgotten Realms (AFR), collector number 30. Current market price: $0.19 (foil $0.30), TCGplayer market prices via Scryfall.
Flash When this Equipment enters, attach it to target creature you control. Equipped creature gets +0/+2. Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)