This spell causes a globe of searing radiance to explode silently from a point you select. All creatures in the globe are blinded and take 6d10 points of holy damage. A creature to which sunlight is harmful or unnatural takes double damage. A successful Dexterity save negates the blindness and reduces the damage by half.
An undead creature caught within the globe takes 1d10 points of radiant damage per caster level (maximum 20d10), or half damage if a Reflex save is successful. In addition, the burst results in the destruction of any undead creature specifically harmed by bright light if it fails its save. The ultraviolet light generated by the spell deals damage to fungi, mold, oozes, and slimes just as if they were undead creatures. Holy burst dispels any darkness spells of lower than 8th level within its area.
At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, the damage increases by 2d10 for each slot level above 7th.