i wonder why bother to classify kage bushin scroll as a secret scroll. why would mizuki want it..it seem most of jounin can use kage bushin anyway. it not really a secret jutsu that should be kept that secure.
so this is what i think..first there are bushin - an illusionary copy learn at the ninja academy. the next level is kage bushin - copy with physical body.i believe there are the next level of bushin jutsu in the scroll...
a forbidden technique - making a permanent copy of yourself.
and if the rumored akatsuki leader is really the 4th, i believe he survive using the technique. so there one dead body which used for sealing kyuubi, and another body still alive. as to why he is the leader is another matter for another thread though.
what do you think about this?