Wave of Light

When the shield emits light, the bearer can use an action to create a blinding wave of light. All creatures in a 15 foot cone must make a Constitution saving throw DC15. On a failed save, a creature take 1d6 radiant damage and is blinded until your next turn. On a successful save, it takes half as much damage and isn't blinded by this spell. Undead have disadvantage on this saving throw.