Ok, we know that there are three special techniques to the mangekyou. One being Amaterasu. Two being Tsukiyomi. Now heres my speculation on the third technique, In Japanese Mythology Amaterasu, Tsukiyomi and Susanoo were siblings. Amaterasu is a Ninjutsu, Tsukiyomi is a Genjutsu, and i believe Susanoo is some kind of Taijutsu. Also Susanoo killed the orochi in mythology, so mayb this technique is used to kill orochimaru in naruto? What do you think? If theres been a thread on this before, dont flame me, just dont post anything.