Board Thread:Naruto Discussions/@comment-26388300-20150713181558/@comment-5407586-20150714163332

The strongest Sharingan jutsu, including Mangekyō ones? Hmmm…

Izanagi and Izanami are the most powerful, but they both require the sacrifice of a Sharingan.

Kamui is probably the strongest Mangekyō ninjutsu, since defense-wise it surpasses even Susanoo, and attack-wise it looks on par with Susanoo. But in general, including genjutsu, Kotoamatsukami might be even stronger than Kamui, only that it can't be spammed (I know Shisui can use it way more often than Itachi's crow, but if even Hashirama's cells can't shorten the timespan to less than one day, I doubt even Shisui can spam it).