Thieves Fire

With outstretched arms both hands make a fist, bend your wrists outward then slam your wrists together with thoughts of a round cut red gem. Each creature in a 15-foot cone must make a Dexterity saving throw. A creature takes 2d6 fire damage on a failed save, or half as much damage on a successful one.

Can be cast while wielding a one handed weapon or dual wielding.

The fire ignites any flammable objects in the area that aren't being worn or carried.

The spell becomes more concentrated at higher levels. At 6th level (3d6), 12th level (4d6), 18th level (5d6).