"With the power of the Yellow Tenseigan, Ōtsutsuki Hailiang is undoubtedly at a super-Kage level within the range of the moon. He's truly troublesome," murmured Kai, gazing at the spot where even the faintest trace of Hailiang's existence had vanished.
The chakra mode of the Tenseigan gradually receded from Kai's body, followed by the release of the Eight Gates and Sage Mode. Even with his perfect Sage Body constitution, Kai could feel the strain—his muscles felt as though they had been torn apart in multiple places.
"Next, I need to find the Yellow Tenseigan," Kai muttered to himself.
The Tenseigan in his left eye rotated slowly, as if sensing a distant pull. It felt like an invisible force was guiding his Tenseigan.
Kai's heart stirred. He chose not to resist this pull, allowing it to guide him forward. He ventured into a cavern, its labyrinthine tunnels resembling a spider's web. Yet, the intricate paths posed no challenge to him. The force continued to guide him, leading him in the right direction.
Finally, Kai stood before an enormous eye emitting a faint yellow glow. The eye seemed to possess its own consciousness, staring intently at Kai's left eye, as if recognizing the aura of kinship emanating from it.
"Congratulations, Host. You have successfully slain Ōtsutsuki Hailiang and completed the mission: Prevent the Ōtsutsuki Clan from destroying the world. You may now begin absorbing the ocular power of the Yellow Tenseigan at any time. The system will assist you during the process," the system's cold, mechanical voice echoed in Kai's mind.
Hearing the system's notification, Kai finally exhaled in relief. The mission brief provided by the system hadn't clarified what exactly constituted stopping the Ōtsutsuki Clan from destroying the world. If it had required waiting until the plot arc twenty years later, Kai might have considered giving up entirely.
However, despite the system's reassurance, Kai dared not recklessly absorb the ocular power of the Yellow Tenseigan.
Kai understood well that the formation of the Yellow Tenseigan required the fusion of the Byakugan powers from countless branch members of the Ōtsutsuki Clan. Each fragment of ocular power carried the will of its original owner. While a few fragments would be manageable, Kai's spiritual strength could eliminate them. But the sheer volume of willpower contained in the Yellow Tenseigan could easily overwhelm and shatter his consciousness.
"Begin the absorption. And system, don't forget to assist," Kai reminded the system, wary of its unreliability.
The Tenseigan in his left eye began to rotate slowly. With its motion, one Byakugan after another emerged from the massive Yellow Tenseigan, all of which were devoured by Kai's Tenseigan.
As the Byakugan powers merged into his eye, Kai initially felt nothing unusual. Gradually, however, faint voices began to echo in his mind.
"Kill the main family!"
"Destroy the world created by the Sage of Six Paths!"
"We are the true inheritors of Hamura's will!"
The influx of Byakugan powers made Kai feel as if his brain was about to explode, with countless thoughts and wills colliding violently against his own consciousness. Just as Kai was on the verge of breaking, a cooling sensation radiated from the depths of his mind, restoring clarity to his thoughts.
As the ocular powers continued to merge into Kai's eye, the massive Yellow Tenseigan steadily shrank in size. Finally, the last Byakugan fused into Kai's eye.
Kai abruptly opened his eyes!
His left eye remained the aquamarine Tenseigan, but his right eye now housed the Yellow Tenseigan, albeit significantly smaller than the enormous one outside his body.
The Complete Tenseigan!
The Yellow Tenseigan in his right eye rotated slowly. Kai's body seemed to lift off the ground, ascending several meters into the air.
"The Complete Tenseigan... The mastery over gravity and repulsion. Truly, a formidable power," Kai murmured in awe.
"Wait... there's someone else here?" Kai's brow furrowed slightly. Using his Kagura Mind's Eye, he sensed two faint life signatures within the cavern.
Kamui!
Before him stood a trembling woman, holding a baby in her arms. The infant's delicate features were marred by two empty sockets, giving it an eerie appearance.
"Ōtsutsuki Toneri?" Kai asked, his voice tinged with curiosity.
The woman warily eyed Kai, retreating two steps. After a brief hesitation, she nodded.
Kai stared at Toneri, lost in thought. The woman, in turn, fixated on Kai, her expression a complex mix of despair, hope, and fear—like a criminal awaiting judgment.
"The descendants of Ōtsutsuki Hamura... According to the rules set by Hamura, you are to remain on the moon for eternity. I will destroy the passage connecting the moon to Earth. From now on, you shall live on the moon," Kai declared.
Without waiting for a response, Kai used Kamui to leave the area, paying no further attention to the pair.
Without the Yellow Tenseigan, the Ōtsutsuki Clan posed no threat. By severing the passage between Earth and the moon, Kai ensured they would have no chance of returning. Only a Six Paths-level powerhouse could possibly overcome such a barrier, and such individuals were exceedingly rare.
Returning to the Ōtsutsuki Clan's dwelling in the alternate dimension, Kai gazed at the pale yellow "sun" hanging in the sky. Slowly, he raised his right arm, curling his fingers into a claw-like shape.
The "sun" in the sky trembled and swelled.
Suddenly, with a resounding boom, it burst apart, scattering into countless pale yellow specks of light that fell onto the water's surface. The passage connecting Earth and the moon was now completely destroyed.
"The application of gravity and repulsion is still so crude. It seems I'll need to restart my research into the potential of the Tenseigan," Kai muttered in frustration.
Passing through the dimensional pool twice more, Kai returned to the familiar world of the ninja.
The Land of Water, perpetually shrouded in mist. Since the establishment of Kirigakure by the First Mizukage, the nation had largely isolated itself from the mainland, apart from its involvement in the Third Great Ninja War. Its mysterious nature set it apart from the other nations.
Following the war, the Third Mizukage mysteriously perished, and the position was succeeded by Yagura, the new Three-Tails Jinchūriki.
During the Fourth Mizukage's reign, the Land of Water was engulfed in an era of "Bloody Mist."
Bloodline limits, often considered symbols of power in the ninja world, were instead deemed omens of misfortune in the Land of Water.
Though others might not know the truth, Kai was well aware. The Fourth Mizukage, Yagura, was completely under the control of Uchiha Obito. The era of the Bloody Mist was undoubtedly orchestrated by Obito from behind the scenes.
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