Chaos

When you cast this spell as an action, black clouds form in the sky. Lightning bolts and fireballs come hurling from the clouds to a point with in range. Everything within a 35 foot sphere must make a Dexterity saving throw, taking 20d6 lightning and 20d6 fire damage on a failed save or half as much on a successful save. Creatures reduced to 0 hit points are killed, leaving only a rubbery skeleton behind.