Sound disappeared.
Light flew.
William and Knight Leader charged in straight at each other and Ascalon and Hrunting struck each other. Despite the simplicity of the action, the aftereffects that spread about the area were tremendous.
With a few moments of delay, an explosive wind blew out.
Along with a tremendous roar, a dome-shaped shockwave spread out with the two men at the center. An explosive storm spread out in an area with a radius of 100 meters and blew away the fully equipped knights. Trees were torn to pieces, the mountain surface crumbled, and the paved mountain path shattered as if it had been made of glass.

Toaru Majutsu no Index vol.18 ch.5 pt.3