Hitodama

Hitodoma is the trademark technique of the Fox Hermit, Yoko Inari. It allows her to gather a sphere of ki-enhanced fox-fire in her hands and launch it at a foe.

Description
The Hitodama is used by flaring one's ki outwards in an intense aura when cupped hands are being drawn to the user's side. Once there the fox-fire is focused to a central point in between cupped hands. The mass of fox-fire is then compressed and shaped into a rotating sphere as it begins to feed on the aura to increase its heat and brightness. It continues to feed on it until it looks like a miniature star is being held between one's hands. Finally, the user thrusts their hands forward and launches the sphere at the target. When the rotating fox-fireball makes contact with its target it grinds into them inflicting devastating burns before decompressing to unleash a blue fiery explosion. The power of the explosion depends on how much ki and fox-fire was used.

Fox Soul Sphere
Energy Sphere is a ki variant of Hitodama. It uses ki as a base instead of fox-fire to allow the user to launch a superheated ki sphere at the opponent.

Ragnarök
Ragnarök is a more powerful variation and it earned its name from how its heat is comparable to the heat of Ragnarök.

Trivia

 * Hitodama was named after the balls of fire that float in the middle of night of Japanese mythology.