Aura of Radiance

When cast, you surge with a bright aura. For the duration, all creatures that start their turn within 50 ft of you, can see you, and are hostile towards you, take radiant damage equal to your proficiency bonus + a number of d20s equivalent to your spellcasting level. At the end of the duration, you regain a number of hit points equal to the damage dealt by this spell during its duration.