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. The fire ignites any flammable objects in the area that aren’t being worn or carried. Each creature in a cone or line must make a Reflex saving throw.
On a failure, it takes 2d6 fire damage and is burning 2.
On a critical failure, it takes twice as much damage and is burning 4.
On a success, it takes half as much damage and is burning 1.
On a critical success, it takes no damage.
You can increase the damage by 1d6 and the burning level by 1 for each additional catalyst expended.