Dawn Burst

A globe of brilliant radiance erupted silently from you as though the light of dawn had arisen.

Each creature of your choice within 10 feet of you must make a constitution saving throw. On a failure creatures take 3d6 points of radiant damage, or half on a success. 

Undead and light sensitive creatures within the area have disadvantage on the saving throw, and on a failure are blinded until the start of their next turn.