Divine Incineration

Outstretching your hands, a burst of flames shoots forth from the centre of your palm, incinerating all those who stand in your way. As you do so, a burning pulse convulses through your body. Each creature in a 15-foot cone must make a Dexterity saving throw. A creature takes 4d6 fire damage on a failed save, or half as much damage on a successful one. From doing this, you take 1 hitpoint of damage.

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 2nd level or higher, the damage increases by 1d6 for each slot level above 1st.