Brilliant Halo

You conjure a glowing halo that hovers above your head. The halo sheds bright light within 30 feet, and dim light for another 30 feet beyond that. For the duration, all attack rolls against you are made with disadvantage (creatures who are immmune to the blinded condition or who do not perceive you visually are unaffected by this), and creatures within the halo's bright light that hit you with an attack are struck with a beam of light that deals 7 (2d6) radiant damage. You also have advantage on all Charisma checks to interact with creatures, and all dice you roll to heal or deal radiant damage explode (as long as you roll the highest number possible for the die, you can roll it again and add to the final result).

At higher levels: When you cast this spell with a 5th-level spell slot, the duration becomes 10 minutes. If you cast it with a 6th-level spell slot or higher, the duration becomes 1 hour, and it does not require concentration.