Board Thread:Naruto Discussions/@comment-26636534-20180325094649/@comment-25122992-20180325104338

Well, as we've seen during Itachi's battle against Team Kakashi, the main danger of his genjutsu is the fact that he could caught the opponeng in the illusion without them even noticing. And, if we recall one of the scenes in Itachi Shinden anime arc, it could lead to the pretty severe consequences (since he made his two Anbu assailants kill themselves thanks to the genjutsu seamlessly cast on them earlier).