Board Thread:Theories and Speculation/@comment-28819877-20170515143845/@comment-4961229-20170516164955

Thekillman wrote: It's a different mechanism. In the most generic terms, you need long-term exposure to the other transmigrant's chakra in order to recreate Hagoromo's chakra. This can be done with flesh (since it creates more chakra and so the supply is refreshed) or with a soul. If Madara had sealed Hashirama inside him for long enough, that would probably also make him meet the requirement. But yes, Obito possessing Kakashi is similar to how a Jinchuriki works. It seems that if you're not being possessed for very long, the effects of extraction aren't fatal (since Obito didn't suffer massively from transferring Kurama, Kakashi didn't die when Obito left and Tsunade didn't die after Dan left. Yet Edo Tensei hosts die when the soul is extracted). Agreed. However, I wasn't equating the mechanisms. I was just pointing out that there is at least one other mechanism that doesn't involve a physical transplant.

Thekillman wrote: It seems that if you are exposed to someone's chakra for long enough, you become compatible with that chakra and that borrowed power becomes almost your own. This happened with Gaara (had same jutsu even after Shukaku was extracted), this happened with Nagato (Had rinnegan when resurrected with Edo Tensei). presumably this also happened with Madara (after decades, Hashirama's power became his own). Exactly. Imagine the possibilities if Konoha pursued this line of research after it was revealed to them in the 4th war. Most of their problems over the years stemmed from lost or diminished critical jutsu: Mokuton, Sharingan, FTG, Adamantine Sealing Chains, etc. Momoshinki lampshades this in the movie! "Too bad you don't have a way of passing on your power." or something to that effect. What if they could retain their ninjutsu at its greatest strength and protect themselves from violations like Edo Tensei at the same time?