Evolved Burning Hands

As you put your hand flat in front of you facing palms forward, you can combine your fire breath skill to create a 25 foot concentrated line of fire that is 2 foot wide and will hit and flow around creatures in the line of fire. Each creature in the 25 foot fire line must make a Dexterity saving throw. A creature takes 3d8 fire damage on a failed save, or half as much damage on a successful one.

The fire ignites any 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 3rd level or higher, the damage increases by 1d8 for each slot level above 2nd.