As everyone knew, cats were creatures with extremely strong curiosity.
If they were careless and some curious ninja cat opened this sealing jar, the massive amount of uncontrollable Nine-Tails chakra inside would bring catastrophic disaster upon the entire Ninja Cat Clan.
Taking it back to Konoha was an even worse idea. It would be far too easy for someone to discover it.
Thus, Uchiha Ensei discussed the matter with Cat Granny for a long time and paid a considerable price before she agreed to reinforce the seal on the Nine-Tails chakra.
This seal was not one placed upon some movable object, but a fixed seal established by making use of the terrain.
There was no helping it. Whether it was his mastery of Sealing Jutsu, his age, or the knowledge he possessed, none of it was enough to allow Uchiha Ensei to study this Nine-Tails chakra at present.
Therefore, if he did not want to hand over the Nine-Tails chakra, this was the best option.
"This is a ruined area deep within the Empty Zone. Normally, no humans come here, nor would any ninja cats."
"That way, even if this Nine-Tails chakra leaks out, it will not cause too much destruction to our Ninja Cat Clan."
"Ensei, remember this. You only have five years. After five years, the seal will be damaged. If you have not taken it away before then, I will arrange for others to come here and dispose of it."
For this trip, Cat Granny had brought nearly half of the Ninja Cat Clan's high-end fighting force, all to better seal the jar containing the Nine-Tails chakra.
As a clan of ninja beasts that had survived in the Ninja World for so long, the Ninja Cat Clan could not be called overwhelmingly powerful, but it did possess a certain foundation.
"Don't worry. I'll keep my promise to you. Haven't you understood my abilities after all these years?"
"It is only because of my age. Otherwise..."
Uchiha Ensei did not say the rest, but Cat Granny understood what he meant.
She felt a little uneasy inside, but on the surface, Cat Granny remained just as proud as the other ninja cats.
The sealing process went very smoothly. At the same time, Uchiha Ensei took out several weapons he had prepared.
Well, they were merely simple detonators and powerful TNT explosives.
If he had traveled to ancient times and had to make everything by hand, producing TNT would naturally have been extremely difficult.
But in the Ninja World, which possessed most modern machinery as well as chakra, finding a way to obtain some powerful TNT explosives was very simple.
Uchiha Ensei had even made smokeless powder and produced some firearms.
As he had said, he was only limited by his age. Otherwise, Uchiha Ensei alone would have been enough to change the entire balance of the Ninja World.
After working busily through the night, Uchiha Ensei was finally sent back to Konoha by the Ninja Cat Clan at dawn.
From Uchiha Inabi, Uchiha Ensei heard a piece of news that came as no surprise.
Minato Namikaze and his wife had died in battle, and the Third Hokage, Hiruzen Sarutobi, had once again assumed the position of Hokage.
Upon hearing this news, Uchiha Ensei was utterly stunned.
It seemed Clan Massacre Night was destined to come after all.
He had clearly told Minato Namikaze everything. With absolute intelligence on his side, how had things still ended up like this?
Damn it, Hiruzen Sarutobi must have been too cowardly and afraid of death.
After cursing inwardly a few times, Uchiha Ensei hardened his resolve and headed directly near the Hyuga Clan. He found an opportunity and collected some Hyuga Clan blood and cells.
Plan one had failed!
Plan two: cloning the Byakugan began!
While Uchiha Ensei was busily beginning his grand cloning project, in a hidden corner of Konoha, the pale-faced Kushina Uzumaki held Naruto Uzumaki in her arms and gazed worriedly at Minato Namikaze, who lay on a bed nearby.
"Kushina, there was no other choice. Minato was ambushed by an unknown enemy, and his mind suffered severe damage. It will be extremely difficult for him to wake up."
"But fortunately, with the help of the two sage elders, Fukasaku and Shima, Minato's life should not be in danger."
"But when exactly he will wake up is difficult to say."
Jiraiya naturally felt great pain as he looked at Minato Namikaze lying on the bed.
But last night, he had been busy dealing with the Nine-Tails and Obito Uchiha. He had not noticed what that half-black, half-white fellow had done to Minato Namikaze.
Last night, with intelligence on his side, Minato Namikaze had nearly done everything to perfection. He had not only summoned Jiraiya back, but Tsunade had also been there to support him.
Yet no one had expected there to be a Transformation Technique that even the Byakugan, Sharingan, and various detection ninjutsu could not distinguish as real or fake.
A moment of carelessness allowed the Nine-Tails to break free of its seal.
Things had still been manageable at that point. Preparations had long been made for the Nine-Tails breaking free of its seal.
Although Obito's Space-Time Dojutsu had caused some trouble, it was still easy enough to handle.
Minato Namikaze quickly restrained Obito with his abundant experience.
If he had simply killed Obito or captured him then, what happened afterward should not have occurred.
But Minato Namikaze had insisted on saving the lost Obito. The instant Obito Uchiha's identity was exposed, Black Zetsu, who had long been hiding in the shadows, quietly struck and launched a sneak attack against Minato Namikaze.
What followed was simple. After an old Jonin from the Sarutobi Clan voluntarily used the Reaper Death Seal, the Nine-Tails was split into two halves and sealed separately within Kushina and Naruto Uzumaki.
Jiraiya went to restrain Obito Uchiha, while Minato Namikaze fought Black Zetsu.
Perhaps no one present had expected Minato Namikaze to fail, much less suffer that kind of incurable soul injury.
Thus, although Uchiha Ensei had changed everything, it seemed as though nothing had changed at all.
Uchiha Ensei himself also began his Byakugan cloning experiments under the immense pressure of Clan Massacre Night.
The cloning technology from his previous life was actually very simple. One only needed to take a specific cell nucleus and egg cell, transplant them into an embryo, and then follow the normal developmental process.
In a sense, this was not truly cloning. It merely allowed an individual with identical genes to develop anew.
But in the Ninja World, many processes changed because chakra existed.
Were the cells not growing quickly enough? Just use chakra to intervene.
Were the cells growing in the wrong direction? Just use chakra to intervene and correct them.
Had the cells developed in the wrong direction? Chakra... oh, there was no fixing that. Just record the experimental results and throw them away.
After a period of effort, Uchiha Ensei successfully cloned a white eyeball.
But this was only the most basic Byakugan, roughly equivalent to what a Hyuga Clan member possessed at birth.
Although the Byakugan was relatively easy to awaken, it still required an awakening process.
To accelerate the Byakugan's development and simulate the awakening process, Uchiha Ensei had no choice but to further deepen his tests and research into chakra.
And such in-depth chakra research naturally led to quite a few accidents.
Before you continue