Board Thread:Theories and Speculation/@comment-24824859-20150704165201/@comment-734582-20150718152547

GreatestSin wrote: obito and his afterlife-kamui... Uhm no, it's fairly easy to explain. It works exactly like Edo Tensei, which allows a user to come back from death and overwrite the target body with it's own powers. What Obito did was essentially a highly advanced Edo Tensei that only affected Kakashi's eyes, allowing him to transform them and give them his Kekkei Genkai. Afterwards it's effect faded (because he lost his ties to the human world) and so the sharingan was gone.

By your explanation, Edo Tensei is a jutsu that can not exist, but it clearly does which invalidates your arguments.

GreatestSin wrote: btw, now that im a it: the sharingan and its creation, another plothole...

and: the susanoo: it is shown that it only needs to be activated and can than be used without MS/EMS, why does it hurt the eyes if it is used? The eye is permanently changed once it's power is unlocked, just as we've always known. The same is true for the Rinnegan. No an Uchiha can not transform every eye into a Sharingan. The trigger is the brain, but it triggers the KG already in the eye. It's just a signal.

The only man ever to use Susanoo without eyes was Madara. It may have something to do with the Perfect Susanoo, like achieving Permanent Susanoo allows it to be used without eyes, yet until that point the eyes are the source of it's power. Note that it was also stated it drains a user's life until it's matured. Clearly some sort of transition is happening as the Susanoo becomes more complete with each use.