Death Blossm

A nimbus of fire motes gather all around the caster much like a shield spell of fire.  At the end of the action, each mote "blossoms" and flashes from you to all vectors in range and then explode into flames. Each creature in a 150-foot-radius Sphere centered on the caster.  Make a Dexterity saving throw, taking 8d10 Fire damage on a failed save or half as much damage on a successful one.

Flammable objects in the area that aren’t being worn or carried start burning.