Shield of Light

Armor (shield), very rare (requires attunement by somebody of good alignment)

You gain a +2 bonus to your AC in addition to the shield’s normal AC bonus. As a bonus action you can cause the shield to flash light. Any creature within a 30 ft. cone of the shield that can see must make a DC 14 Constitution saving throw or be blinded for one minute. A blinded creature can attempt the saving throw again at the end of each of its turns, ending the effect on a success. Once used, the shield can’t flash again until the following dawn.