Kagayaki

is a special genjutsu created by Senkai. According to him, it is of the highest calibre due to it's complexity when creating it along with its effects. However, once done so, it becomes a versatile.

Overview
Will is the power of choosing or determining one's actions. It is a disposition which varies according to one's nature and attitude. Those with greater wills are deemed emotionaly stronger, capable of going through the worst of situation without their ideals falter, whilst the weak-willed are easily influence by their own surroundings and their ideals are completely altered, losing themselves in the control of others. It is not a skill that is inherited or learnt, it simply exists or doesn't exist, it can be either weak or strong. Only experiences can improve or deplete one's will. Not even dojutsu or any other can grant one great willpower.

Usage
The technique itself revolves around will. The user can cast it with a variety of ways, with the usual being the actual name of the technique to cast it through the ears or a wide malicious grin to cast it through the eyes. which includes the environment taking a new inverted color. Lightning flickers from the sky and hits the target, resulting in massive electrocution and unconsciousness. The technique remains cast whilst the victims are asleep, forever plaguing them in eternal slumber.

Releasing it with the traditional method is regarded as impossible, however, those with indominable will can remove the illusion rather easily. The technique affects one's thoughts, manipulating them to feel the lightning and fall asleep. To the weak-willed, the pain of the lightning strike can be excruciating and even fatal, as it is too real, causing their minds to think that way. Even those with strong wills must be able to withstand the lightning strike or release it completely, or they may not awaken from the slumber that comes next. Dojutsu are unable to release the technique, and only those with great willpower are able to.

Drawbacks
The illusion takes up little chakra but exerts the stamina of the user, leaving them fatigued. If they are already too tired, they may become unconscious.