Re: Learning Genjutsu with Reborn
To make it short, Genjutsu [or illusion techniques], is a type of jutsu that affects the mind of someone's opponent rather than dealing physical damage like taijutsu or ninjutsu. Genjutsu works by the user feeding their chakra into the intended person and uses said chakra to disrupt their chakra network in the brain [which targets the 5 senses, or at least 4 since I haven't seen taste being manipulated; hm sounds like a decent CJ]. When someone is under genjutsu, like said before, the user is able to manipulate the senses; the most known having been affecting sight [such as demonic illusions]. Genjutsu ranges in a variety of techniques like ninjutsu, from weaker versions like "Demonic Illusion: False Surroundings Technique" to forbidden ones like Tsukyomi, Kotoamatsukami and Izanami.
As someone is falling victim to genjutsu, the best way to realize it [without metagaming], is to observing for anything overly-obvious or something which would naturally probe their suspicion. Or if you have a Hyuga bio [like me for example] you can easily see that your chakra network is not flowing properly, so you can quickly tell you're under someone's illusion. To fight off the effects of Genjutsu, there are three ways. The first option is for the victim to stop their own chakra flow in their body, and then apply an even stronger power of their chakra to disrupt the flow of the caster's chakra [known as "Kai"]. The second way is to have an ally unaffected by the Genjutsu make physical contact, and use their chakra to disrupt the caster's flow. Or, if you're not willing to wast chakra on Kai, the last way is to inflict physical pain onto one's self. This certain method varies from different ranked techniques which can result from a small stab wound to the lose of one's limb. Notable users of Genjutsu are, Fukasaku & Shima, Itachi, Sasuke, Kurenai and Danzo.