Thunder Struck

Shockwave of sound and lighting expands from the caster in a 100 foot radius. The sound waves bend around corners and through open doors.  
Creatures in the area of affect must make a CON save. On a failed save creatures within 10 feet of the caster take 3d10 lightning and 3d10 thunder damage. Creatures between 10 feet and 50 feet from the caster take 3d8 lightning and 3d8 thunder damage.  Creatures between 50 feet and 100 feet take 3d6 lightning and 3d6 thunder damage.  Creatures take half damage on a successful save.