Senju Tobirama, the second generation of Huo Ying, as the strongest inventor of Ninjutsu in the whole field, has invented countless Ninjutsu and forbidden techniques, including BUG Ninjutsu, which can bring back the dead? Dirty earth reincarnation? . The conditions of metempsychosis operation are harsh, and the conditions of dissolution are also harsh. It is even more difficult if the subject wants to release control when he is resurrected. First of all, the soul of the person you resurrected can't be sealed, just like Yakushi Kabuto's second resurrection. At that time, the souls of Senju Hashirama, Senju Tobirama, Sarutobi Hiruzen and Feng Bo Shuimen were sealed, so even if he had these bodies, he could not revive them.
Later, orochimaru released the souls of these people, and they were reincarnated by filth. Secondly, filth must also be sacrificed to the living as the soul container of the resurrected. Finally, a certain amount of DNA of the dead is needed, which is the condition for reincarnation of the polluted land.
So, how can the resurrected release the control of the performer? Either a level 6 person contacts you to help you unlock the control directly, or you know that the seal of reincarnation can be unlocked. When orochimaru summoned the first generation and the second generation for the first time, did he ever consider that the second generation would really be reincarnated and could be reincarnated on the spot?
There are only the following possibilities: first, this is a plot BUG. At that time, Kishimoto began to paint Naruto, without considering that the setting after the reincarnation of filth would become like this, so when the setting was added to filth later, the previous plot naturally became incomprehensible; Second, orochimaru didn't know that the second generation could unlock the seal of filthy metempsychosis, so he boldly used it, but he couldn't explain why the second generation didn't unlock his control until the ape died. Did he have a premonition that someone would use filth to reincarnate and do something bigger? ; Third, the release of the cycle seal of the dirty soil and the display of the cycle seal of the dirty soil are two different things, just like your door key and your computer boot password are two different things.