Board Thread:Theories and Speculation/@comment-36019309-20190114073523/@comment-32685487-20190114213821

Tsukuyomi is a tech that depends on the overall power and chakra being used with it. As shown vs Sasuke in P1 Itachi can make it a world where he controls time and time dilation in the victims brain, as shown in P2 vs Sasuke he can make it a simply more powerful Sharingan Genjutsu which was obviously easier to break out of than the more powerful usage. If we are going to include novel feats for other people on any of these threads then we can do the same for Itachi and at FULL POWER he can make over 80 years go by in a persons brain in 1 second, effectively killing them by shutting their brains down.. but it leaves him super exhausted doing this. He has different levels of effort(chakra usage and power put into the tech) for his Genjutsu, Sharingan Genjutsu, and MS Genjutsu including Tsukuyomi. In fact when it 30% of his chakra he couldn't risk using his MS or its techs because it would risk expending the clone pain made so he was stuck with his normal Sharingan and no MS techs.