Quote Originally Posted by Zero Phoenix View Post
I'll make this simple. Who would Izuna have learned the technique from? Unless you have an answer to that you don't have much of an argument.
He might have created it. This would work as a parallel to the Senju brothers. It would mean that both, the Younger Uchiha Brother and Younger Senju Brother, have created jutsu that had something to do with Life & Death, Transferring/Bringing the Soul and the like.

It's not like Oro learned it from anyone, he made it into an usable state from the information he gathered, why couldn't anyone else do it too ? It have already been proven to be possible, so why the heck are you calling it impossible ?