Aura of the Sun (EFA - A)

You fill the area around you with warm, glowing light. Any creature attempting to cast a spell or use a supernatural ability which causes magical darkness within your aura must succeed on an Intelligence (Arcana) check against your spell save DC or the effect fails. Areas of magical darkness originating from 3rd-level or lower spells and effects are dispelled when overlapping with your aura. Creatures that suffer penalties in bright light, such as drow, also suffer them while within your aura. When an undead creature enters the area for the first time on a turn or starts its turn there, it takes 1d8 radiant damage. Furthermore, creatures within the aura have disadvantage on Dexterity (Stealth) checks. This effect is centered on you and moves with you.