earthquake of fire

A bright streak flashes from the ground and lava From the ground and then blossoms with a loud roar into an explosion of flame and lava. Each creature in a 20-foot-radius Square centered on that point must make a Dexterity saving throw -2 if the Target within 10 feet of the Castor. A target takes 8d15 fire damage on a failed save, and damage on a successful one.

The fire spreads around corners. It ignites flammable objects in the area that aren't being worn or carried.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d15 for each slot level above 2rd.