Board Thread:Theories and Speculation/@comment-26537507-20150930205403/@comment-734582-20150930210337

Curse of Hatred wrote: My question is this: what makes those defining features specific to their respective techniques? What's stopping a Sharingan user with high genjutsu prowess from having a genjutsu that alter's the victim's perception of time? Is there any reason other than Kishimoto being his usual self? From what i understand, these Genjutsu don't require training or prowess whatsoever. Both Koto and Tsuku are essentially a script that is activated on command. Contrast to regular Genjutsu which seems to involve a lot of prowess, creativity and general power. Sasuke did a powerful genjutsu on Danzo but he commented it didnt alter perception of time.

It would basically require a beyond-masterful Genjutsu specialist to perform a Tsukuyomi-like attack while a MS-user can do it in an instant.