Heishiro takes the normal focusing stance and flares his chakra, taking aim at his opponent(s). The air around his body begins changing color to a black color, swirling around him rapidly. Remaining in his focus stance the air quickly encloses the area that Heishiro and his opponent(s) occupy, creating a dome of air denser than steel. Enclosing larger areas takes both more chakra and more time, making it dangerous to enclose any area larger than 100 feet. This may also be used to enclose only his targets within the dome, confining them to an area he controls. Due to the nature of this jutsu the entire area within the dome will instantly combust from a fire jutsu.