Naruto: Awakening Eternal Power with My Eye Techniques

Later, Shiyu Uchiha conducted an in-depth study of Phantom Clones and was astonished to discover that their basis actually lay in Yin-Yang Release!

At first, this unexpected discovery seemed hard to believe, but after multiple verifications, Shiyu Uchiha confirmed the truth. He became extremely excited, fueling his desire to explore new possibilities.

Thus, he boldly experimented and gained inspiration while using the Summoning Technique to summon Saya. He successfully developed a technique known as "Phantom Substitution," capable of rivaling [Space Ninjutsu] within short distances.

This achievement not only deepened Shiyu Uchiha's admiration for the legacy of yin-yang masters but also greatly increased his interest in the mysterious power of Yin-Yang Release.

It also gave Shiyu Uchiha a stronger sense of achievement. After all, he had long envied Minato Namikaze's [Flying Thunder God Technique], yet Hiruzen Sarutobi and others would never allow him access to the Scroll of Seals, let alone teach him such a powerful jutsu.

The emergence of Phantom Clones undoubtedly added a mysterious edge to Shiyu Uchiha's fighting power, giving him greater confidence when facing formidable opponents. The appearance of Phantom Substitution meant that Shiyu now possessed self-preservation abilities in most dangerous situations.

Because of this, once rested up, Shiyu Uchiha didn't rush to leave. Instead, upon the miko's invitation, he stayed as a guest in the Land of Demons for a while, using the opportunity to discuss yin-yang techniques with her while refining his Shifting Body Technique.

When he first mastered the technique, it was just a rough idea formed by inspiration meeting experience—an unrefined concept needing refinement. Shiyu Uchiha planned to perfect it before returning to Konoha, so as to elevate his overall strength another step forward.

After days of effort, Shiyu Uchiha eventually succeeded in fully improving and finalizing his self-created Shifting Body Technique. Additionally, during the process of organizing everything, he made new discoveries.

Phase One (B-rank): A simplified version of this technique—no hand seals required, or rather, replacing seals with footwork combined with chakra manipulation within the body. Essentially a purely taijutsu-based form of instantaneous movement. At this stage, the user could move swiftly like a shooting star while maintaining flexibility, achieving high-speed mobility.

Moreover, Shiyu Uchiha learned to harness the tremendous impact force created by his speed and apply it to his sword attacks. This not only increased the speed of his blade techniques but also made them sharper and fiercer.

Shiyu Uchiha had also hoped to integrate Kujaku's flight ability further into the technique to develop a flying secret art. However, due to a lack of understanding, he kept failing and eventually had to give up regretfully, deciding instead to wait until future inspiration struck.

Phase Two (A-rank): With the enhancement provided by Mystic · Fire Release · Chakra Mode, this technique evolved into a nin-taijutsu version. Its foundational capabilities were significantly improved, while acquiring three additional variations—involving agility (Spirit), leaping (Vertical), and endurance (Horizontal)—sufficient for evading attacks from Kage-level enemies.

Phase Three (S-rank): Kinjutsu (a forbidden technique). By forming a single hand seal, users could generate phantom clones similar to illusionary clones mid-movement, serving the purpose of distracting enemies.

Although these phantoms still lacked offensive capability, they allowed the user to create proximity at close range and perform another hand seal to execute Phantom Substitution—achieving effects akin to [Space Ninjutsu].

Under Shiyu Uchiha's test, even the standard triple-comma Sharingan had trouble distinguishing it. The [Mangekyou] would also need some time to tell them apart unless corresponding dojutsu techniques were actively employed, since this clone technique was rooted in Yin-Yang Release.

Moreover, this Shifting Body Technique was incredibly fast—so much so that even the Sharingan struggled to identify the real one after tracing its movements. How it would hold up against the Byakugan remained uncertain.

Additionally, Shiyu Uchiha gained new inspiration and insights into further developing his inner cultivation method from this experience.

However, when he actually attempted implementation, new problems emerged. Yin Release chakra and dōkuriki were vastly different from pure spiritual energy. Establishing a spiritual space within the chakra system required deeper research and practice before there was any hope of success, which would take a long time.

Even recalling the ancient legend of Rokudo creating the world, Shiyu speculated that it might have been an extraordinary feat utilizing Yin-Yang Release to establish a Spiritual Space.

This connection gave Shiyu a deeper understanding of Yin-Yang Release's power and ignited his determination to study it further, increasing his eagerness to uncover the secrets hidden behind Yin-Yang Release.

During the following period, Shiyu Uchiha frequently communicated with the miko. Naturally, their discussions centered around information related to Sage-Level Yin-Yang Masters.

Thanks to those talks, Shiyu picked up a lot of useful knowledge and insights—he really hit the jackpot. Meanwhile, during their exchanges, they completed the division of spoils—Shiyu only took the Yin-Yang Master's scroll, while the miko received Chimei Wengliang's chakra along with the shikigami and unique stone statues.

At the same time, both shared their profound comprehension and insights about Sage-Level Yin-Yang Masters. Shiyu even discovered that Miroku's power bore certain characteristics typical of Sage-Level Yin-Yang Masters, similar in nature to his own Mangekyou Dōkuriki.

In addition, Shiyu corrected a mistaken belief: what he initially thought was a qualitative transformation of Miroku's vitality had been incorrect. Actually, her spiritual energy had fused with her life force, leading to his misjudgment.

Of course, according to Shiyu, this misjudgment likely had been intentional misinformation by Miroku. Anyone attempting to attack her would definitely be doomed.

Nonetheless, her power wasn't complete either, and it came at a great cost, explaining why Miroku was so relentless in pursuing Sage-Level Yin-Yang Mastery.

This realization helped Shiyu finally understand some fundamental aspects of his own dōkuriki—the Mangekyou's power similarly resembled second-stage transformed spiritual energy but unfortunately remained incomplete, hence its severe aftermath.

For Shiyu, mastering this unification of life force and spiritual energy was more crucial than anything else—that's why he didn't mind being so generous when splitting the loot, keeping only a small portion.

Additionally, Shiyu Uchiha learned from the miko about a powerful ninjutsu called "Shinigami Kinjutsu," a refined version developed by this lineage, along with its complementary techniques. He also discovered that this forbidden technique mimicked the power of the Rinnegan's Naraka Path.

Through in-depth research, Shiyu identified flaws within this kinjutsu, while simultaneously deepening his overall understanding of jutsu.

Miroku invited Shiyu Uchiha to jointly study, master, and modify the forbidden art of shikigami, aiming to transform onmyōji's *shikigami* (spiritual familiars) into ninja forms. Although this aligned perfectly with Shiyu's own research interests, he would have been expected to accept Miroku's proposal without hesitation.

However, Shiyu wanted to return to Konoha as soon as possible. As far as he knew, Hatake Sumao had already left on a mission and might be returning to the village soon. He was running out of time, but still managed to spend his last moments proposing several theoretical frameworks.

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