Storm Crest

Storm clouds shroud the user's form for just a moment and blasts ferocious Lightning at four different points you can see within range. Each creature in a 40-foot-radius sphere centered on each point you choose must make a Dexterity saving throw. The sphere spreads around corners. A creature takes 20d6 Lightning damage and 20d6 Thunder damage on a failed save, or half as much damage on a successful one. A creature in the area of more than Lightning attack is affected only once.

The Thunder damage does double damage against structures.