Board Thread:Theories and Speculation/@comment-31099706-20170327120301/@comment-27089028-20170407000356

Obito states Itachi had mastery over the Tsukiyomi when comparing it to Sasuke's pathetic by comparison Genjutsu so I very much doubt that as the only case to be made is Itachi could have extended the time of the Tsukiyomi but as we all know his levels of Chakra and stamina are dog s*** in comparison to Sasuke's.