Lightning Storm

Storm clouds gather as lightning and hail plummet to the ground 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 cold damage on a failed save, or half as much damage on a successful one. A creature in the area of more than storm is affected only once.

The spell damages objects in the area and creates difficult terrain as the ground is blasted and frozen.