Re: Naruto 642
I just had a crazy theory. The Juubi obviously is not from their world. What if the reason it is vulnerable to nature energy is because its from the planet itself and acting as a sort of immune system attempting to fight an infection. That might explain how the first sage was able to defeat the juubi in the first place. He literally used the potent chakra of the planet itself as the means by which to defeat the juubi. That would imply then that if naruto wants to completely and utterly defeat Obito than he probably will have to figure out how to do the same otherwise the juubi will easily be able to regenerate Obito no matter what attacks naruto or anyone else throws at him.