Blinding Powder is a uncommon Artifact — Equipment card from Betrayers of Kamigawa (BOK), collector number 153. Current market price: $0.45 (foil $2.57), TCGplayer market prices via Scryfall.
Equipped creature has "Unattach Blinding Powder: Prevent all combat damage that would be dealt to this creature this turn." Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)