While Sengoku was recruiting personnel, Uchiha Tamahiko wasn't idle either. He sent a Shadow Clone to watch Gran Tesoro, instructing Tesoro to sail to the New World.
His main body, meanwhile, returned to the Ninja World to arrange for personnel to be ready to come over and work at any time.
He planned to do one last job while the Ninja Villages' work capacity hadn't declined, earning some money to retire.
The Shadow Clone in North Sea had been recalled long ago because the Revolutionary Army could now handle things on their own, and Kuzan had led a team to South Sea, attracting a lot of attention.
He had also recruited some of Kaido's subordinates, even his daughter Yamato, who was full of motivation.
Uchiha Tamahiko had assigned some of the recruited Marine Vice Admirals to Kuzan's command. With their hearts in his hands, he wasn't afraid of them causing trouble.
Back in the Ninja World, Konoha was bustling. Although various new cities had been established, Konoha itself had become the political center, with Nagato becoming the first President and Administrator of the Ninja World Federation.
He worked almost fifteen hours a day; if not for the Uzumaki clan's physique, he probably would have collapsed long ago.
When he saw Konan, she visibly looked several years older. Working overtime with such a workaholic was indeed tough.
"How do you feel now?" Uchiha Tamahiko asked curiously.
He had no interest in managing so many things, as he knew best that strength was everything. Being chased that night in Konoha had left a deep impression on him.
"Although many people died in the process, and it was very difficult to do, I see the dawn of peace!" Nagato replied earnestly.
"That's good then." Uchiha Tamahiko nodded. If he liked the work, then he should continue to work hard.
He then had Nagato arrange for the current leaders of the other Five Great Villages to prepare at least a thousand Ninja, awaiting his notification.
Afterward, he strolled around Konoha, checking on Vinsmoke Judge's research. He was currently developing a second-generation strengthening agent, but more importantly, he was researching a strengthening agent that everyone could use.
At the same time, he checked on the current situation of the clan. After the last rectification, everyone had become much more compliant. Those with ambition continued to cultivate, and once their strength reached its limit, they would be arranged to cultivate Sage Mode. The channels for advancement had never stopped.
Later, when there were Devil Fruit, they would also be arranged directly.
"Do you feel like you've reached the limit of your strength now?" Uchiha Tamahiko found Itachi and asked him.
Itachi was only one step away from the Rinnegan. He had also learned Sage Mode, just lacking the Rinnegan level.
"I feel like I can still improve, but the Amplitude isn't very large. It should be the strength gained from increased physical fitness due to aging," Itachi said truthfully.
During his time in the Ninja World, he didn't have much work. Besides showing off his Complete Body Susanoo a few times to scare people, he hadn't fought many wars.
So he was basically cultivating, learning various Ninjutsu from the clan, including those in the sealing scrolls, strengthening himself in all aspects.
"There's a method we can try now. I'll inject a large amount of Chakra into your body. You use this integrated Chakra to focus it all on your Mangekyo. Perhaps you can break through to the Rinnegan, but the risks are unknown, and it's hard to determine," Uchiha Tamahiko said to Itachi.
The only difference between Itachi and Sasuke should be the massive Chakra of Indra's reincarnation.
However, all Tailed Beast now had Jinchuriki, and it wasn't good to kill the existing Jinchuriki, as they were all from the Five Great Villages. If it could definitely be done, Uchiha Tamahiko would still do it, but currently, it was unclear, so they could only try.
"It's alright, I believe the plan the clan leader mentioned should succeed." Itachi fully trusted Uchiha Tamahiko.
He could say that he was living a very happy life now. Every day he returned home, he could see Sasuke's smiling face, and hear his parents' daily complaints. All of this came from the man in front of him, so he was willing to sacrifice his life for it. Therefore, he also needed to have enough strength to protect his family, his clan, and uphold the glory of the Uchiha.
"Then tomorrow morning, come to Vinsmoke Judge's laboratory to do this," Uchiha Tamahiko nodded and said.
He was confident that even if something went wrong, he could still save Itachi. Besides the Rinnegan being able to absorb Chakra if there was a problem with it, the Ope-Ope no Mi's ability could also dissect Itachi's body to avoid danger.
Early the next morning, Itachi was already waiting in Vinsmoke Judge's laboratory.
Vinsmoke Judge was very serious; he was completely obsessed with bloodlines. Orochimaru, on the other hand, completely disregarded bloodlines and instead frantically researched Devil Fruit and the trunk of the God Tree.
"I'm ready!" It wasn't Itachi or Uchiha Tamahiko who said this, but Vinsmoke Judge.
He had prepared all sorts of measuring instruments. Uchiha Tamahiko didn't understand what these things were; they seemed to be constantly upgrading and changing every time he visited.
Uchiha Tamahiko opened his right hand, and a dense white light directly appeared in his palm. Then, Uchiha Tamahiko pressed this white light onto Itachi's shoulder. Instantly, Itachi's entire body subtly emitted this white light. This was Uchiha Tamahiko's own Chakra fused with the Tailed Beast, Chakra that was close to the Ten-Tails' attribute.
Itachi instantly felt a massive amount of Chakra appear in his body, as if it were endless. If he were to activate Complete Body Susanoo in this state, he felt he could maintain it for several days and nights.
However, very quickly, the excessive Chakra caused pain to emanate from various parts of his body. The quantity was too much, and he felt his body was about to give out.
"Alright, begin!" Uchiha Tamahiko said directly after judging that the injected Chakra was equivalent to one Tailed Beast.
Although it was painful, Itachi didn't make a sound, enduring it while adapting to the Chakra as quickly as possible.
After Uchiha Tamahiko spoke, Itachi no longer hesitated, connecting all the Chakra to his Mangekyo. The Mangekyo Sharingan, like a black hole, continuously absorbed this Chakra.
Itachi felt his eyes gradually heat up and a sensation of pain. This feeling only occurred when he used ocular techniques and Susanoo before, without using first hokage cells.
"Ugh, ahhh!" The pain quickly intensified, and Itachi couldn't help but let out a pained cry.
Uchiha Tamahiko also activated his Rinnegan, constantly observing Itachi's physical condition. His left hand had already activated ROOM, ready to stop this evolution at any moment.
Vinsmoke Judge cautiously watched the data. All the data was rapidly increasing. A normal person would have already bled from all seven orifices, but Itachi at this time merely had bulging veins on his forehead and was breaking out in cold sweat.
Uchiha Tamahiko also noticed that Itachi was not in danger, so he continued to watch him without any action.
Just before Itachi was about to collapse from exhaustion, a powerful aura instantly erupted from him. The screens of the surrounding instruments flickered as if affected by some interference.
Itachi also closed his eyes, seemingly falling into a motionless coma. However, a few seconds later, Itachi's eyes opened, with concentric circles—the appearance of the Rinnegan.
"It succeeded!" The fastest to react was Vinsmoke Judge.
He immediately and unceremoniously drew blood from Itachi for research and comparison.
"Since you already have the Rinnegan, rest for two days and then come with me to Another World to do some work," Uchiha Tamahiko nodded with satisfaction.
Then he unceremoniously exploited him.
Shisui was almost driven mad with work every day; bringing another person would alleviate some of his pressure.
"Yes!" Itachi, on his part, had long wanted to go to Another World and reunite with Shisui.
When he cultivated every day, Izumi always tried to talk to him, preventing him from concentrating on his training, which was quite troublesome.
.....
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