Arcflash

You create a flash of lightning energy between your hands that arcs out in a 15 ft. cone originating from you. All creatures in the cone must make a Dexterity saving throw. On a failed save they take 2D6 lightning damage and are blinded until the end of their next turn. On a successfull save they take half as much and are not blinded.

Additionally a creature behind cover has advtantage on this save.