Chaos Firestorm

Columns of chaos fire start erupting around you. Each creature in a 65 foot-radius sphere centered surrounding you must make a Dexterity saving throw. A creature takes 25d6 fire damage and 20d6 force damage on a failed save, or have as much damage on a successful one. A creature must also make the saving throw when it moves into the storm’s space for the first time on a turn or ends its turn there.

The spell damages objects in the area and ignites flammable objects that aren't being worn or carried.