Having waited for months, Shinji naturally wasn't in a rush now, so he first calmed Karin down before returning home to plan the arrangements for the push toward Rinnegan alone.
"First, I need to summon Yugito Nii. As the Two-Tails Jinchuriki, her chakra alone is worth a ton of ordinary people."
"This time, the push for Rinnegan must be absolutely confidential and cannot be conducted in the village."
"It would be best to use instruments to monitor Karin's physical data as she awakens the Rinnegan, providing data support for my own attempt later."
Shinji scribbled in his notebook, jotting down every point that needed attention.
The Two-Tails Jinchuriki, Yugito Nii, was currently hidden in the Land of Hot Water under his arrangements. The Land of Hot Water, close to the sea with its varied and complex terrain, was ideal for wanted criminals to hide and operate, so despite Cloud Village's relentless pursuit, they had never found a trace of Yugito.
However, bringing Yugito to the Land of Fire would drastically increase the risk of exposure.
After all, things were no longer like they were a few years ago. The Akatsuki's activities, combined with the 'Upper String' secretly puppeteering the Grass Shinobi Village, had put the five great shinobi villages on edge, strengthening their intelligence and communication networks several times over. Even Shinji himself had to be extremely cautious when traveling now.
Otherwise, a single slip could expose his whereabouts.
As for confidentiality, this time it had to be airtight.
The Rinnegan carried immense significance. If its existence were exposed, it would not only be coveted by the five great shinobi villages but also attract hostility from Nagato, as well as Obito and Black Zetsu lurking in the shadows.
After all, the 'Outer Path Statue' was something Uchiha Madara had summoned from the moon after awakening the Rinnegan. If a second Rinnegan appeared in the shinobi world, it would inevitably cause unpredictable interference with Uchiha Madara's—or more precisely, Black Zetsu's—'Moon's Eye' plan.
As for the location, Shinji chose the secret laboratory outside Hidden Leaf Village.
His secret laboratory was not only hidden and secure but also equipped with various instruments, allowing him to comprehensively monitor Karin's process of charging toward the Rinnegan.
After finalizing some details, Shinji began preparations.
Over the next few days, Shinji summoned Yugito to the Land of Fire while using 'Jikibi' to notify Haku, Shion, Yakumo, Sasuke, and Kimimaro, instructing them to maintain their condition and be ready for potential chakra extraction at any moment.
During these days of preparation, the Eternal Mangekyo Sharingan in Karin's eye sockets experienced several stirrings, with the frequency increasing each time.
Three days later, Yugito finally arrived at a hideout Shinji had arranged for her on the outskirts of Hidden Leaf. With the Jinchuriki in place, all preparations were complete!
At night.
Moonlight cascaded like a waterfall, spilling across the earth.
Two figures darted through the dappled moonlight in the forest, swift as phantoms, covering dozens of meters in the blink of an eye.
Undoubtedly.
These two figures, moving with some secrecy, were Shinji and Karin.
After slipping out of the village, Shinji led Karin to his secret laboratory outside the village to begin the push for Rinnegan.
Upon arriving at the secret laboratory, Shinji didn't rush Karin to start. Instead, he chatted with her to ease her tension while calibrating the instruments.
Once all the instruments were fully calibrated, Shinji looked at Karin and said calmly, "Charging for the Rinnegan is likely to be a lengthy process, and the chances of succeeding in one go are slim. So, don't be too nervous—just let it happen naturally!"
"Mm!"
Karin nodded, her tension easing considerably.
This was exactly the effect Shinji wanted.
For someone like Sasuke, a bit of provocation might yield surprising results, but for Karin, there was no need for that. Excessive pressure would only lead to forced errors, ultimately doing more harm than good.
After connecting the instruments to Karin, Shinji said, "You can start channeling chakra into your eyes now!"
Following Shinji's instructions, Karin closed her eyes and began to try.
Shinji didn't idle either. He monitored the instruments while activating 'Wazunagi,' opening a 'Wazunagi' channel linking Yugito and Karin, ready to transfer chakra into Karin's body at any moment.
Soon, through 'Jikibi's' sensory perception, Shinji noticed intense chakra fluctuations in the Eternal Mangekyo Sharingan in Karin's eye sockets. He quickly glanced at the nearby instruments, and the values displayed confirmed his sensory findings.
"This is… the All Creation Power?"
Shinji's expression grew serious. The eruption of the 'All Creation Power' meant Karin had officially entered the critical phase of the push, and everything was unfolding as he had anticipated.
Thus, Shinji began monitoring Karin's chakra state with even greater precision.
As a member of the Uzumaki clan, Karin naturally possessed immense chakra and vitality far beyond ordinary people. Moreover, Karin's situation was unique—her chakra had innate healing properties, a rarity even among the Uzumaki clan.
Additionally, having successfully integrated First Hokage cells and gained the Sage Body of the Senju clan, her chakra reserves alone were already terrifying, second only to a Jinchuriki in the shinobi world.
Even as Karin followed Shinji's instructions, pouring chakra into her Eternal Mangekyo Sharingan without holding back, the rate of chakra consumption was slower than expected.
It wasn't until over two hours had passed that Karin's chakra began to weaken, showing signs of running out of steam.
Shinji quickly checked the instruments and noticed that as Karin's chakra was overconsumed, the chakra fluctuations in her Eternal Mangekyo Sharingan dropped from their peak and began to slow.
Without intervention, this attempt would likely fail.
"It's time!"
No longer hesitating, Shinji, who had been ready, immediately channeled Yugito's chakra through the 'Wazunagi' channel, pouring it into Karin's body in one go.
With the support of fresh chakra, Karin knew it was from her leader, so she unhesitatingly continued pouring it into her Eternal Mangekyo Sharingan.
As the new chakra flowed in, the instruments immediately showed that the chakra fluctuations in Karin's Eternal Mangekyo Sharingan had returned to their previous peak, with faint signs of breaking through even further!
Shinji's lips curled into a smirk.
The entire process was smoother than he had imagined. Most importantly, he confirmed his hypothesis was correct: as long as there was enough chakra, even tailed beast chakra, it would aid in the push for Rinnegan. And as long as his approach was sound, the chakra reserves he had prepared should be sufficient for the task.