Genjutsu

Genjutsu techniques are the illusion techniques of a ninja, they normally require hand seals. Genjutsu will use hypnotism to cause hallucinations in others. By causing such illusions they can cause their target mental pain and suffering just as real as physical hurt. Genjutsu is created when a ninja extends their chakra flow through the cerebral nervous system of their opponent to control their minds chakra, thereby affecting their five senses.

To combat the effects of Genjutsu, there are two options. The first option is for the ninja to stop the flow of chakra in their body, and then apply an even stronger power to disrupt the flow of the casters chakra. The second option is to have an outside ninja unaffected by the Genjutsu make body contact, and use their chakra to disrupt the casters flow. Genjutsu attacks usually will require a lot of skill, and if performed incorrectly will not work. These types of attacks use up a high amount of chakra and need perfect hand seals. Because of this they're most often used by a fighter with very high amounts of chakra or as a last resort.