Wyrm's Flame p. 56
Desert Wind [Fire]
You spin your blade in a whirling arc. With each revolution, seething flames build upon its length. With a flourish, you bring your blade to a halt, point it at your foe, and unleash a roaring wall of flame.
Masters of the Desert Wind can twirl and spin their blades with such power that they can evoke a great burst of fire. When you execute this maneuver, you blast forth a cone of fire that deals 10d6 points of fire damage to all in its area. Creatures in the area can attempt a Reflex save (DC 18 + your Wis modifier) for half damage.
This maneuver is a supernatural ability.