After obtaining the secret scroll for the "Yin Seal" (Strength of a Hundred Seal), Shinji returned to the Flying Fortress.
Back in the laboratory, he immediately threw himself into the development of "Karma."
The first step, naturally, was mastering the "Yin Seal." The threshold for cultivating this secret technique was extremely high; currently, in Konoha, only Tsunade had mastered it.
Of course, for the current Shinji, whether it was a secret technique or a forbidden technique, as long as it didn't involve cutting-edge domains like Space-Time or Fate, it wasn't difficult for him.
It took only about thirty minutes for Shinji to grasp the principles of the "Yin Seal."
With the "Yin Seal" as a foundation, Shinji quickly created a prototype of "Karma."
Subsequently, he took a White Zetsu clone out of a large nutrient tank and placed it on the operating table in the center of the laboratory.
During the Fourth Great Ninja War, Shinji had spared some time to collect a few White Zetsu clones.
Because White Zetsu clones were not only extensions of the God Tree's power but also excellent subjects for cellular experiments, he could use them not only to reverse-engineer the God Tree but also to conduct various biological and toxin experiments thanks to their powerful regenerative abilities.
After connecting the instruments to the White Zetsu clone on the operating table, Shinji monitored the clone's physical data displayed on the screen while attempting to inject the newly created "Karma" prototype into its body.
The injection of "Karma" was completed quickly.
Shinji immediately woke the unconscious White Zetsu and used genjutsu to control it, manipulating it to attempt to activate the "Karma" injected into its body.
Bang...
Just as Shinji was preparing to record what changes would occur in the body data after the White Zetsu clone activated "Karma," the clone on the operating table exploded abruptly with a muffled sound.
"It couldn't withstand my chakra?"
A thought flashed through Shinji's mind, but he subsequently shook his head.
The physical strength of a White Zetsu clone was definitely at a top-tier level in the Ninja World. Only descendants of prestigious clans possessing the Sage's Body, like the Senju or Uzumaki, could possibly surpass a White Zetsu clone in physical durability.
So, this shouldn't be a problem with the White Zetsu clone's durability, but rather a problem with Shinji's "Karma."
Shinji thought of Orochimaru's "Cursed Seal" again and pondered, "'Karma' isn't purely chakra; it is a compressed file of information. It contains not only the chakra information of the 'Karma' owner but also the personality information of the 'Karma' owner."
Tap.
Tap.
Tap.
Shinji tapped his finger lightly on the desk, continuing his analysis: "'Six Paths Level' chakra is simply not something an ordinary person can control or utilize..."
Let alone "Six Paths Level" chakra, even the Ten-Tails—no, even just an ordinary Tailed Beast—was not something a ninja could easily control.
Tailed Beasts had ravaged the Ninja World for so long, yet the number of ninjas who could control a Tailed Beast and become a Perfect Jinchuriki could be counted on one hand.
Therefore, if there was no personality information of the "Karma" owner inside the "Karma" to assist the host in controlling the power, the host activating "Karma" would be no different from committing suicide. This was why the White Zetsu clone just now exploded and died the instant it activated "Karma."
"I must inject my own personality and will into the 'Karma' to assist the host. Only then can the host possibly control my chakra!"
Shinji finally understood the key connection within!
Immediately, he turned his thoughts to Orochimaru's "Cursed Seal."
Orochimaru's "Cursed Seal" solved the problem of personality informatization (encoding personality) using a relatively crude method. This method involved violently splitting a part of his own soul and then injecting it into the "Cursed Seal" in the form of a seal.
Through this method, although he could use the "Cursed Seal" to achieve resurrection and achieve an effect close to "Karma," because the method was too crude, it also left many hidden dangers. For example, the "Cursed Seal" was easily removed, and in the hands of a powerhouse, the opponent could completely utilize the small amount of Orochimaru's soul in the "Cursed Seal" to replicate a brand-new Orochimaru.
Shinji could do exactly that!
Shinji even suspected that he didn't need to do anything extra; he just needed to wait for time to pass, and that part of the soul split by Orochimaru in the "Cursed Seal" would slowly become independent, merge with the host, and turn into a brand-new personality.
Furthermore, splitting the soul would cause a severe decline in the main body's spiritual power. For Shinji, who had been dedicated to improving the intensity of his chakra, this was undoubtedly an act of damaging his own foundation.
Curling his lips, Shinji let out a light chuckle.
He wasn't mocking Orochimaru, because from Orochimaru's perspective, this was already the ultimate limit of what he could achieve.
After all, without crossing the threshold of "Six Paths Level," one simply didn't have the ability to edit chakra.
This was also why Shinji firmly believed that as long as Shion could create a "Magic Ring," she could step into the "Six Paths Level." Because the "Magic Ring" technology of the Six Rings World was, in reality, also a technique for re-editing magical power (mana).
The reason the Supreme Sorcerers of the Six Rings World couldn't reach "Six Paths Level" was that they needed the help of a Mage Tower to construct the "Magic Ring." If a Supreme Sorcerer appeared in the Six Rings World who didn't need the assistance of a Mage Tower and could construct a "Magic Ring" with their own power, then that person would be worthy of the title "Six Paths Level."
Shinji didn't suffer from Orochimaru's awkwardness. He had now stepped into "Six Paths Level." In this brand-new field of chakra editing, although he was a novice, he merely lacked experience, not that he was stuck by some threshold.
Awakening another White Zetsu clone, Shinji instructed the clone to clean the operating table while he began to attempt injecting his personality and will into the "Karma" by editing chakra, using chakra as the carrier.
This process was slightly unsmooth because things like personality and will were hard to grasp; this involved self-cognition. So Shinji tried for a long time before slowly finding the method and mastering the technique of encoding his own personality information.
Subsequently, he began attempting to inject his personality information into the "Karma."
Previously, his "Karma" was pale grey, which he found a bit strange. But as his own personality information was injected, the color of the "Karma" gradually deepened, finally becoming black.
After re-editing the "Karma," Shinji ordered the White Zetsu clone that had just cleaned the operating table to lie down on it, and then injected the "Karma" into the clone's body.
Once everything was ready, Shinji monitored the instruments while controlling the White Zetsu clone to activate the "Karma."
Instantly, ink-colored traces spread out from the "Karma" injected into the White Zetsu clone's body, covering half of the clone's body.
And as these ink-colored traces covered it, the White Zetsu clone on the operating table achieved a leap-like explosion in both cell activity and chakra volume.