Speak of the Devil Technique

This particular Genjutsu is, unlike others, activated through verbal expression. In this regard, the Genjutsu utilizes the words spoken by the user, and subsequently employs them as a means to direct the chakra network's flow within the brain. In turn, the brain creates illusory, holographic images which play upon a "big screen." This said illusion becomes more potent depending on the victim's connection to the said words, and how they interpret them. Therefore, the technique is rather subjective in its effect, and is entirely dependent on the personal relevance that the victim has to the words spoken.