"Phew."
After slowly exhaling, Uchiha Yoichi stretched lazily, ending his training of Genetic Primordial Energy.
After disconnecting the wires and tubes monitoring his physical condition, Uchiha Yoichi said to Orochimaru, "How is it? Any findings?"
"Maybe a bit, but it still needs research."
Orochimaru turned his head to check the data and said, but Uchiha Yoichi felt Orochimaru was stalling, so he asked, "Orochimaru, your research is actually stuck, right?"
"....."
Orochimaru's lips twitched briefly before he said, "Such a novel thing, it doesn't look like a technique commonly used by ninjas. It's inevitable to hit a bottleneck in research... However, I've made significant breakthroughs in other areas, like the Rebirth Jutsu."
"How about it, Mr. Yoichi, are you interested? With this jutsu, you can switch bodies at will and live for a long time."
Upon hearing this, Uchiha Yoichi shook his head vigorously and said, "Not interested at all, my body is the strongest in the Ninja World, no need... wait, give me a copy though. But Orochimaru, is this Rebirth Jutsu that unfinished Immortal Rebirth from last time?"
"That's right, I've perfected it now, paired with the Juinjutsu, the effects of rebirth are even better!"
"Can you split the soul into two like a Shadow Clone during rebirth? This way you can control two bodies.... I'll go back and study it; remember Spirit Transformation Jutsu probably has corresponding principles."
Uchiha Yoichi pondered and said, his words making Orochimaru's eyes light up.
Before leaving, Uchiha Yoichi added, "Orochimaru, your biggest misconception about the Rebirth Jutsu is wanting to reincarnate into someone else's body. Why not clone your own body? That way, there's no need for a struggle."
After speaking, Uchiha Yoichi left, taking the Rebirth Jutsu scroll from the table as he went.
After a while, Orochimaru recovered from his contemplation and said, "You're right, Mr. Yoichi, but I think... hmm? Already gone?"
Though the person had left, Orochimaru's thoughts were expanding. He now had considerable research on Wood Release and Sharingan, and some ideas about cloning through cell cultivation...
After leaving Orochimaru, Uchiha Yoichi planned to improve Spirit Transformation Jutsu and Rebirth Jutsu.
The ability he had recently drawn happened to assist him in solving this issue.
[Research Assistant]: Provides research ideas and solutions based on the theoretical knowledge currently controlled by the host, fulfilling requests as needed. The required time depends on the knowledge controlled by the host.
Uchiha Yoichi studied this newly drawn ability and understood that, simply put, it substitutes him to research something, the research ability of this [Research Assistant] is exactly Uchiha Yoichi's own capability.
It saves him the research time.
He hopes to research the Flying Thunder God Jutsu to ten stages, creating a Flying Thunder God Space; but after submitting the target to the research assistant, it showed that it would take sixty-seven years.
That is to say, based on Uchiha Yoichi's current understanding of Flying Thunder God Jutsu, non-stop research for sixty-seven years would lead to the development of Flying Thunder God Space.
It's too difficult, lottery draws done over three months can accurately redeem half a month of ability, to use Research Assistant to complete Flying Thunder God Space, he needs to accumulate more than four hundred years of lottery draws.
Unless his understanding of Space-Time Ninjutsu continually deepens, there's no way to shorten the time.
After coming back, Uchiha Yoichi first researched Spirit Transformation Jutsu, an S-Class Soul Kinjutsu which he previously acquired but hadn't practiced due to its limitations.
While deploying Spirit Transformation Jutsu, the body can't move, at that time Uchiha Yoichi was basically a lone wolf, naturally disregarding such a forbidden jutsu needing body abandonment.
But today, after the thought of creating Spiritual Clone for rebirth arose, he felt using [Research Assistant] to help him achieve this jutsu shouldn't be a problem.
"Mentally managing Chakra, pushing consciousness out of the body..."
After some research, Uchiha Yoichi found that Spirit Transformation Jutsu has very high requirements for Yin Release, almost the highest among all forbidden jutsu in Konoha.
"How coincidental, my control over Yin Release isn't too bad, worth attempting this jutsu..."
Eternal Mangekyo Sharingan itself is the extreme of Yin Release, coupled with Uchiha Yoichi's frequent practice of Perception Ninjutsu during Flying Thunder God Jutsu training, made his control over mental awareness exceptionally agile.
After researching for a while, Uchiha Yoichi began to seal and attempt Spirit Transformation Jutsu: "Rooster-Ox-Rat-Snake-Hog..."
"Spirit Transformation Jutsu!"
Once the jutsu was successfully cast, Uchiha Yoichi immediately felt a lightness of consciousness, then directly soared upwards.
But afterward, Uchiha Yoichi saw his own body again, still maintaining the sealing posture.
"The feeling of the soul is really relaxed, and Chakra also brings out a lot..... In soul-state my eyes are still Eternal Mangekyo, just can't use Pupil Techniques..."
Uchiha Yoichi quickly explored his soul state, having Chakra, able to use Ninjutsu, but only his very proficient Ninjutsu.
Slightly difficult Ninjutsu require meridian coordination, which Uchiha Yoichi couldn't perform; possibly due to being accustomed to using the body to release Ninjutsu, abruptly switching to soul state couldn't execute.
"If I can use Lightning Release Chakra in soul state, then I can use other Ninjutsu too, just needing prolonged attempts... once skilled I become an aerial mobile turret, plus soul moves swiftly."