After a brief silence, Tsunade quickly relayed the situation to Uchiha Shin.
At the same time, Shin had already become entangled with Kaguya Otsutsuki in an unexpected way.
Kaguya had digitized herself, injecting her essence directly into Shin's body.
A crescent-shaped mark manifested on the palm of his right hand, pulsing with an eerie glow.
"Hahaha! Times have changed. This is the era of seals!"
Staring at the black insignia on his hand, Shin was ecstatic.
Due to his deep research into chakra, Kaguya's karmic imprint couldn't fully decompress and reincarnate through him. His sheer soul strength alone was enough to suppress Kaguya Otsutsuki indefinitely within his mind.
In turn, Shin could tap into the power of Kaguya's chakra without resistance.
As her data merged into him, Shin instinctively extracted parts of her abilities.
Amenominaka, Yomotsu Hirasaka, Infinite Tsukuyomi—he was gradually absorbing her bloodline techniques. However, he had only managed to extract around 20% of her full abilities thus far.
Both Amenominaka and Yomotsu Hirasaka were completely integrated.
As long as he continued this slow, methodical breakdown of her essence, he would eventually attain the full range of Kaguya's abilities while simply sitting in place.
"When I reach 100%, it'll be like devouring a Chakra Fruit for free. This is insane!"
Shin was in such a good mood he almost felt like breaking into song.
"Shin-kun, this feels… strange."
Kaguya's voice echoed within his mind, tinged with discomfort.
She had not willingly chosen to use the karma seal, but when she realized it was her only means of escape, she had no choice.
Now, however, trapped inside Shin's body, she felt completely dominated.
Her entire being—her thoughts, her soul—was laid bare before him, leaving her feeling more exposed than she had ever been in her long existence.
She couldn't explain why, but this was not how it was supposed to be. The Otsutsuki Clan had never described such a scenario when discussing karma implantation.
"…I'll get used to it eventually, I suppose. Still, it's unsettling."
Shin grinned mischievously.
"Oh? How about this?"
Snap!
A sharp clap echoed within his mind.
Kaguya gasped. An unmistakable sensation rippled through her essence, as though Shin had just smacked her—despite her being in a purely spiritual form.
She felt the impact on her backside, of all places.
"How… how dare you?!"
Despite her outrage, the sensation was real. It made sense in a twisted way—after all, she had transcended physical form when she ate the Chakra Fruit, meaning her very soul could be interacted with in ways few could understand.
And within Shin's mind, there was no escape from his grasp.
He was about to experiment further with his newfound control over Kaguya when Tsunade's voice cut through the moment.
Regaining his composure, Shin chose to focus on her words instead.
When she mentioned scientific ninja tools, his expression twisted in confusion.
"…The hell did I just hear?"
As Tsunade repeated Orochimaru's explanation, Shin finally pieced everything together.
"So because of the external threats, the nations united, shared their tech, and this led to a sudden tech explosion?"
"…Huh?"
Tsunade blinked. She couldn't follow his way of thinking.
'Why do smart people always phrase things in a way that makes my head hurt?' she mused silently but chose not to press further.
What mattered was that Shin seemed to understand the situation better than she did, which meant it likely wasn't an issue.
After all, she needed Orochimaru to break things down for her, whereas Shin grasped the concept immediately.
Shin mulled it over. The early rise of the Kara organization was likely the root cause of this technological shift.
Founded by Otsutsuki Isshiki, Kara had always possessed a terrifying amount of advanced knowledge.
This was simply the natural progression of things.
"Hmph. Those little rats think they can change the game with their toys?"
Muttering to himself, Shin quickly composed a message for Tsunade.
"Head to Roran and restart the puppet manufacturing lines.
I've got cutting-edge schematics here—just follow them. Give them to Orochimaru; he'll figure it out."
With that, Shin transmitted detailed blueprints of Tailed Beast Mechs, Automaton Puppets, and War Beasts to Tsunade.
Ever since Kaguya's karma had merged with him, his perception of the world had evolved drastically.
Previously, such a feat would have been impossible. Now, it was effortless.
Tsunade suddenly found her mind flooded with vast amounts of intricate data.
She couldn't fully grasp these technological marvels yet, but a strange certainty settled within her—given time, she could recreate them.
No longer hesitating, she immediately set off to meet with Orochimaru.
Meanwhile, Shin finally began his main task: breaking the seal.
"Mikoto, be ready. I'm coming."
"Come, Shin-kun. I will accept everything you give me."
Mikoto, standing outside, spread her arms wide with a warm, maternal smile.
Shin hesitated for a moment. Something about the wording felt…off. But he had no time to dwell on it.
Having witnessed Kaguya's karma firsthand, he now possessed a refined understanding of chakra transference.
He had already simulated this process countless times over the past few months.
This time, he was 100% certain of success.
"Sage Curse Seal—Karma Transmission!"
A deep hum resonated through the air.
Mikoto suddenly felt a foreign chakra surge into her body. Yet, rather than reject it, she embraced the sensation wholeheartedly.
A wave of satisfaction flooded her mind as Shin's presence filled her to the core.
On her slightly rounded abdomen, the Sage Curse Seal gleamed with a pulsating pink light.
The intricate pattern shifted, expanding outward in mesmerizing spirals.
Mikoto bit her lip, suppressing the overwhelming sensations coursing through her.
At this moment, her pale skin became adorned with hypnotic, otherworldly markings—giving her the appearance of a bewitching succubus.
Yet her expression remained serene, almost sacred. Her overwhelming maternal aura made the sight even more striking.
"Ah…!"
With a soft gasp, a hand emerged from the center of the curse mark.
At the same time, the Chibaku Tensei that had imprisoned Shin's original body began crumbling away.
His figure gradually reformed, his handsome face emerging as his body stepped out from Mikoto's own.
Step.
As his feet touched the ground, a white and gold cloak materialized upon him.
He slowly opened his eyes.
Within his pupils, the blood-red Nine Tomoe Rinnegan Sharingan glowed ominously.
A terrifying surge of power erupted from his being, shaking the entire Moon.
Its raw force howled like a storm, the joy of his return made manifest.
Far away, in the Pure Land, Otsutsuki Hamura and the Sage of Six Paths immediately sensed the familiar, yet dreadful, presence reawakening.
Their expressions darkened.
Uchiha Shin had returned.
And this time, he was unstoppable
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Bonus Chapter - 100 Power Stones