As an action, you can create a vial of liquid that smells of kerosene. A creature can take the contents into their mouth and spit it out as an action as a thin sheet of flames shoots forth. Each creature in a cone or line must make a Reflex saving throw.
On a failed save, a creature takes 3d6 fire damage and is burning 1.
On a successful save, a creature takes half as much damage and doesn’t start burning.
The fire ignites any flammable objects in the area that aren’t being worn or carried.
You can increase the damage by 1d6 and the burning level by 1 for each additional catalyst expended.