After all, even combining Mangekyou Dōkuriki with Fire Release still remained a mystery to him, let alone creating an entirely new Kekkei Genkai.
It's worth noting that Shiyu Uchiha had already completed his meticulously crafted Second Ultimate Move of Sword Techniques—[Breaking Army]. [Breaking Army] and [Seven Killings] were vastly different techniques; the former focused purely on overwhelming power.
Since it was designed to target a Jinchuriki in Tailed Beast transformation form, this move naturally packed an incredible destructive force, capable of effortlessly tearing through a Tailed Beast's chakra cloak. However, it also had a significant drawback—it lacked speed, making it difficult to keep up with the extreme mobility of a transformed Jinchuriki. So to unleash its full power, Shiyu had to create the right opportunities himself.
What pleased Shiyu Uchiha most about this technique was that two powerful sword styles he created independently could now complement each other! Within this synergy lay the intense interplay between speed and strength, akin to the harmony of Yin and Yang within Tai Chi—it was the very foundation of all sword variations.
With this unique technique, Shiyu was able to break down every refined sword method he had ever encountered, cleverly integrating them into his self-developed sword style known as Great Flame Slash. By reorganizing these elements, the Great Flame Slash rapidly evolved, eventually experiencing a rebirth like a phoenix rising from ashes, reaching an entirely new level that strengthened his overall foundation.
Successfully connecting all previously acquired sword techniques into one cohesive system enabled him to achieve remarkable progress in his swordsmanship in a short span of time.
Meanwhile, the Great Flame Slash itself, serving as the root for both ultimate moves [Seven Killings] and [Breaking Army], underwent further refinement. As his mastery over the Great Flame Slash sharpened day by day, both [Seven Killings] and [Breaking Army] grew stronger like bamboo shoots after spring rain, their power significantly enhanced compared to before.
This created a perfect virtuous cycle—the continuous breakthroughs in swordsmanship made the ultimate moves more formidable, while the increased power of these ultimate techniques in turn propelled his swordsmanship toward higher realms. Unfortunately, despite experiencing explosive growth in swordsmanship during this period, the precious legacy left behind by Uchiha Shizhi would soon be completely exhausted.
Shiyu Uchiha, after long periods of rigorous training and real combat experience, finally solidified all the sword skills he had mastered into genuine combat capability. Regrettably though, no matter how hard he worked, he still couldn't reach that supreme realm where the two distinct sword techniques—[Seven Killings] and [Breaking Army]—could perfectly merge together.
In Shiyu Uchiha's eyes, if [Seven Killings] and [Breaking Army] could ultimately fuse seamlessly into one, they would undoubtedly demonstrate incomparable power and subtlety. At that point, slaying a mere Tailed Beast would become effortless, allowing Shiyu to perform an interdimensional version of "slicing down Hua Xiong over a cup of warm wine"—a feat akin to a legendary warrior's effortless triumph.
Unfortunately, there was still a slight lack of that critical opportunity needed to achieve the perfect form, preventing its realization and leaving him quite frustrated.
Even worse, after years of dedicated cultivation and refinement, Shiyu Uchiha discovered his sword techniques had reached a dead end. If he wished to advance further and elevate his strength, he would have to start from scratch once again, just as he had in the beginning, steadily accumulating experience and skill step by step.
Faced with this dilemma, a thought crossed Shiyu Uchiha's mind: if he could spar and exchange techniques with the legendary Seven Swords of the Bloody Mist from Kirigakure, he might gain the inspiration and opportunity necessary to break through his current bottleneck. After all, they were the finest swordsmen in the entire Ninja World, and their methods might offer a fresh new view!
Even Cloud-nin would be a good option—their Combined Taijutsu was unmatched across the ninja world. Unfortunately, at this moment, he was located in Grass Country, where very few Iwa-nin excelled in sword techniques, offering him no real value.
Even so, after countless hours of relentless training and sharpening his skills at the edge of death, Shiyu Uchiha believed that his swordsmanship had now reached its pinnacle. Across the vast ninja world, it would be difficult to find a rival.
After one sword technique practice session, he stood on a vast open field, firmly gripping the long blade that had accompanied him for many years. A gentle breeze brushed past his face, rustling his black hair. At that moment, he felt full of confidence and pride.
In the current ninja world, perhaps only the legendary ninja from Konoha—Sakumo Hatake—having rebuilt his way of the sword, could stand a chance against him in terms of sword techniques. Aside from him, whether it be the Seven Swords, or the eight Jinchuriki of the Cloud-nin, Killer Bee, all fell slightly short in the realm of sword arts.
Besides his breathtaking sword techniques, Shiyu Uchiha had also made major breakthroughs in the Phantom Shifting Body Technique. This unique body flicker technique had originally emerged from a series of coincidences. It unintentionally combined the essence of both Yin Release and Yang Release, creating such miraculous effects that the user could instantly move like a ghost—unpredictable and hard to defend against.
Back then, Shiyu Uchiha had no understanding of its mysteries; he could use it but could not grasp its essence. However, now, with his deepening comprehension of Yin Release and Yang Release, this mysterious and unfathomable body flicker technique finally opened its doors to him.
Gradually, the secrets hidden beneath the surface began revealing themselves to his eyes. Through in-depth analysis of the principles behind the Phantom Shifting Body Technique, Shiyu Uchiha suddenly had an idea—why not apply this extraordinary ability to Sharingan Genjutsu?
After meticulous research and repeated trials, Shiyu Uchiha successfully developed a new Sharingan Genjutsu technique—[Magical Mirage: Clone Jutsu], a special Clone Jutsu enhanced by Sharingan Dōkuriki.
When unleashed, this technique could create multiple illusory clones. These clones were indistinguishable from the original—not only in appearance, but also in aura and movement—and could not be dispelled by regular Sharingan Genjutsu.
Although not as powerful as the original Sharingan Genjutsu used by Shiyu Uchiha himself, these clones could effectively blur the enemy's vision and disrupt their judgment, making them invaluable for creating prime attack opportunities for Shiyu Uchiha.
In addition, Shiyu Uchiha had significantly deepened his understanding and application of unique Sharingan techniques, such as [Magic Illusion: Sharingan], Golden Binding Jutsu, Celestial Mirror Inversion, among others. Especially with [Magic Illusion: Sharingan], which was his specialty, his mastery—combined with the power of the Mangekyou—had reached an extraordinarily high level.
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