After returning home, Uchiha Shin sat on the sofa, adapting to his newly awakened Eternal Mangekyō Sharingan. With his eyes now at their peak, he wasted no time in experimenting with their abilities.
"Just treat it as training my dōjutsu, absorbing everything through the portrait technique!" he muttered to himself, a smirk tugging at his lips.
Uchiha Shin was done following traditional training methods. He'd learn each technique once by himself and then refine it using his [Projection Reflection] ability. With his pupil power constantly regenerating, he wanted to push himself to the limit, mastering everything in one go.
With every expenditure of chakra and dōjutsu energy, one forbidden technique after another was transformed from memory into practical use. The process of imprinting these techniques onto his [Projection Reflection] consumed a tremendous amount of ocular power.
There were simply too many jutsu he had obtained from the Scroll of Seals and various ninja clans.
Even a genius shinobi would find it impossible to master them all through conventional means. But with his portrait ability, Shin continued refining technique after technique, spending an entire day engraving them into his arsenal.
In the following days, he delved deeper into his newly discovered synthesis mechanism within the [Projection Reflection].
"Some unique jutsu, like Wood Release, Magnet Release, and Dust Release, are chakra transformations rather than stand-alone techniques," Shin noted. "They can't be freely combined with others unless there's a proper balance."
Every fusion attempt had a success rate. If two techniques weren't compatible, the synthesis would fail.
The best way to ensure success was to completely master the techniques being combined—whether it was ninjutsu, taijutsu, or genjutsu. Otherwise, failure was inevitable.
After repeated experiments, Shin successfully created several compound jutsu. Now, he set his sights on synthesizing secret and forbidden techniques.
Fortunately, the synthesis process didn't erase the original jutsu. Instead, it allowed him to further refine and modify them.
Over the past few days, Shin had fully mastered various secret and forbidden techniques, but a few stood out—the [Spirit Sealing Technique], the [Mind Possession Technique], and the [Shadow Paralysis Technique].
His Eternal Mangekyō Sharingan had granted him an immense boost in mental and spiritual power, making him particularly adept at techniques related to the soul and Yin Release.
"I've been burning through my dōjutsu energy lately, and I haven't given my Eternal Mangekyō much time to recover," Shin murmured to himself. "I probably only have enough left for one advanced deduction and one synthesis."
With that thought, he focused on his next target.
"What I'm most interested in now is the [Spirit Sealing Technique]."
His Eternal Mangekyō spun rapidly, glowing with a deep red light as it analyzed the technique.
[Reconstructing the Spirit Sealing Technique within the mind...]
Within minutes, the technique was refined into something new.
"This time, the results are excellent," Shin noted. "Now, not only can I eject my spirit from my body, but I can forcibly extract an enemy's soul as well."
The technique granted him two modes of attack. He could project his own spirit outward to pull souls remotely, or if in close contact, he could forcibly rip the enemy's soul from their body.
Unless they had a countermeasure, this move was practically a guaranteed kill.
A shame there was no one to immediately test it on.
Or rather, there would be soon.
The Daimyō of the Land of Fire had sent an envoy to demand his removal as Hokage.
The political structure of the Naruto world was absurd. The Daimyō held greater authority than the village leader, meaning a Kage required their approval to take office. Since Shin had seized the position by force, the Land of Fire had condemned his actions.
Now, they were sending representatives to strip him of power and appoint a new Hokage.
Shin scoffed. "I've been busy stabilizing Konoha, and I ignored the Daimyō for a while. Now they dare challenge me?"
With his mood slightly soured, he returned to experimenting.
The [Mind Possession Technique] had already undergone an advanced transformation.
Originally, this technique allowed its user to send their consciousness into another person's body to control them. However, it came with many restrictions and risks.
After being enhanced through his portrait technique, Shin no longer needed direct line-of-sight to target someone. His mental projection could move freely, changing directions mid-flight instead of traveling in a straight line.
Yet, he found this evolution unsatisfactory.
"Before advancing the [Spirit Sealing Technique], I could already achieve this level of control," Shin muttered. "If I truly want power, I need to take things further."
Since both techniques involved spiritual energy and were highly compatible, he decided to merge them.
"Let's see what happens."
As he activated the synthesis process, he immediately felt an increase in the consumption of his dōjutsu energy.
Two distinct branches of jutsu knowledge intertwined and merged in his mind.
The process was shorter than the advanced refinement, and when it was complete, a brand-new soul-based technique had been created.
Shin smirked. "I'll call this one the [Soul Domination Technique]."
Unlike the original jutsu, this technique no longer required Shin to eject his soul or make physical contact.
Instead, with sheer mental energy alone, he could extract a target's soul from their body within a radius of three kilometers.
This was significantly shorter than his [Kagura Mind's Eye] perception range, but still highly effective.
More terrifyingly, the technique had another effect.
If Shin's spiritual power vastly exceeded that of his victim, he could erode and absorb their soul into his own.
"To think I'd develop such a broken technique," Shin whispered, his Sharingan glowing with eerie delight.
Eager to test it, he left his residence without bothering to inform Kanako and the others.
Heading straight to Konoha's prison, he selected two death-row inmates.
Activating [Soul Domination], he reached out from beyond the prison walls.
His sheer mental pressure instantly yanked the prisoners' souls from their bodies.
The lifeless bodies collapsed to the ground, their eyes dull and vacant. They weren't dead yet, but without their souls, they had become little more than vegetables.
If a soul remained outside its body for too long, the body would inevitably perish.
Ordinary shinobi, unable to perceive souls, wouldn't even realize what had happened.
Shin studied the wraith-like spirits floating before him.
He estimated he could control at least 30,000 such souls at once.
"If they were jonin, the number would be lower," he mused. "But even if I could command just 3,000 jonin souls in battle... I'd be unstoppable."
What shinobi could possibly defend against an army of untouchable spirits?
Smirking, Shin decided to take it a step further.
"Let's see what happens when I devour them."
With a thought, he crushed the two souls in his grasp.
Spiritual energy surged into his body, flowing through him like a rush of cool air. It was intoxicating.
The corrupted soul energy was purified by his Yin-Yang Release, converting it into raw power.
Shin exhaled sharply, his body buzzing with newfound strength.
"Now this..." he murmured, eyes glinting with dark excitement, "...this is power."
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