Re: What really happened to Yagura
No problem, it makes sense, I do believe the same, however, what I think the jutsu does, is that it shortens your life span rigorously. So for Obito to use it, he would probably shorten his own life too much. Uzumaki has longer life span, so possibly, they could do it. Why couldn't Nagato bring back Jiraya, you ask? I doubt it has anything to do with time.
Originally Posted by Moe22
I once made a long theory/explanation on the 3 worlds in Naruto. Shortly we have the impure world (earth), the pure world (heaven), and the world between them, lets call it pre-pure world (ppw). In the ppw, you are preparing to go to the pure world, however, if you made some "big" mistakes in your life, and cannot forgive yourself, you are unable to move on to the pure world, and you will be stock between.
A soul can only be brought back with rinne tensei, when it has not yet entered the pure world. In other words the person still wants to go back. If you have just recently died, you do not move on to the next world right away, which is why, it is easy to revive people, who has just died.
Best proof is Kakashi and his dad. Kakashi meets his dad in this ppw, where they talk, and his father is forgiven, so that he can move on. He obviously stayed in this world for very long, and he would have stayed there, forever, if Kakashi had not dumped in to forgive him. Jiraya moved on. Given his last thoughts, he said, he was finally able to do the right thing, and he died in the right way, etc.. Madara would then obviously know all about this, and he made sure (in whatever unknown way) that his soul would stay in the ppw.
I still, however, don't think the 3-tailed roamed wild, as you say. It was clearly said (by Itachi), that they had no reason to capture Naruto in part 1, because they had to wait 3 years, before their plans could start. This was because Yagura had died, and they needed to wait for the beast to reappear. So it wouldn't make sense if he was ever revived by rinne tensei, would more be a waste of life force by Nagato.