Frigid spires of hail crackling with electricity plummet to the ground at 4 different points you can see within range. Each spire is a cylinder of ice 10-feet wide and 50-feet tall. Each 5-foot-square frozen section has AC 5 and 15 hit points, with vulnerability to fire damage. Reducing a frozen section to 0 hit points destroys it, and destroying 4 or more sections causes the spire to collapse.
Any creature within a 40-foot-radius centered on each points you chose must make a Dexterity saving throw. A creature takes 20d6 lightning damage on a failed save, or half as much damage on a successful one. Any creature with a 10-foot-radius takes an additional 20d6 bludgeoning damage on a failed save, or half as much damage on a successful on, and must move to the nearest unoccupied space. A creature in the area of more than one electric burst is affected only once.