Burning Flash

A thin sheet of extremely bright flames shoots forth from you. Each creature in a 15-foot Cone makes a Constitution saving throw, taking 3d4 Fire damage and have the Blinded condition until the end of your next turn on a failed save. or take half as much damage with no status condition on a successful one.

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

Using a Higher-Level Spell Slot. The damage increases by 1d4 for each spell slot level above 1.