Crown of Brilliance

A blazing crown of golden light surrounds your head, shedding bright light to 5 ft. and dim light to 20 ft. Creatures that start their turn within the bright light or enter the space for the first time on their turn must succeed on a Constitution save or be blinded for 1 minute. A blinded creature can make this saving throw at the end of their turn so long as they are no longer within the bright light, ending the effect on a success. Creatures with sunlight sensitivity such as drow or vampires have disadvantage on this save. 

In addition, undead take 2d6 radiant damage from this aura each round they stay within 5 ft.