Cataclysm

A swirling portal opens above a point you choose within range. Chaotic energy spews forth from the portal. Every creature within a 60-foot-radius sphere centered on that point must make a Dexterity saving throw. On a failed save, a target takes 8d6 fire damage, 8d6 lightning damage, 8d6 acid damage, 8d6 cold damage, and 8d6 poison damage, or half as much damage on a successful save.

The energy spreads around corners.