Board Thread:Theories and Speculation/@comment-1512913-20161119171442/@comment-28443183-20161207181309

Elveonora wrote: Hm. I'm 99% sure that Susanoo uses Sharingan chakra, the same 'special uchiha brain chakra' as Sharingan does, but you don't really need eyes for it once you already can use it, the chakra is in the brain, doesn't need to go to the eyes to use Susanoo. I'm not sure about this 'special uchiha brain chakra' being so much uchiha special afterall. Kakashi awakened the Mangekyou by only having the uchiha eye in his eye socket without this special uchiha chakra in his brain (to my knowledge obito didn't/couldn't transfer his special 'agony' chakra in the moment of Mangekyou awakening). I personally think that in the moment of personal character agony every brain produces some kind of special chakra, the key is to have uchiha special eye that interacts with this chakra in the right moment thus obtaining Mangekyou. Susanoo is also a product of 'agony' special chakra and it firstly manifests not without the eyes, but with initial interaction with eyes and sets itself somewhere in 'body' probably in brain. That could also explain the fact that Obito spirit possessing this special chakra transfered into Kakashis brain (as they spoke in the brain) and thus kakashi also could use the Susanoo. There must be some initial interaction with both eyes, if not Obito could use the Susanoo with one eye only since he has the uchiha 'brain'. There was such speech in manga that the true power of eyes can be brought by having both eyes only.