Aura of the Sun

You fill the area around you with a warm, glowing light that eliminates natural shadows and hampers magical darkness. Any creature attempting to cast a spell with the Shadow or Darkness descriptors must succeed a spell check against the caster's save DC. All creatures within the radius must make a CON save or be blinded for the duration, repeating the save at the end of their turns.

Creatures within range with the Undead or Fiend subtype, take 2d6 radiant damage at the start of each of their turns.