Blazing orbs of fire, ice, venom, acid, and lightning plummet to the ground at five different points you can see within range. Each creature in a 50-foot-radius cone centered on each point you choose must make a Dexterity saving throw. The fire sphere spreads around corners. A creature takes 20d6, fire, cold, poison, acid, or lightning damage and 20d6 bludgeoning damage on a failed save, or half as much damage on a successful one. A creature in the area of more than one fiery burst is affected only once. If the target is a metallic dragon they take double damage.

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

this spell can be cast only by a warlock with Tiamat as they’re patron, or a sorcerer with a chromatic draconic bloodline.