Glaring Spotlight is a rare Artifact card from Gatecrash (GTC), collector number 229. Current market price: $2.28 (foil $6.30), TCGplayer market prices via Scryfall.
Creatures your opponents control with hexproof can be the targets of spells and abilities you control as though they didn't have hexproof. {3}, Sacrifice this artifact: Creatures you control gain hexproof until end of turn and can't be blocked this turn.