Using a principle similar to the reverse of the Living Corpse Reincarnation, it is indeed possible to fuse Chakra with the soul and refine the soul!
Even if foreign Chakra is ownerless, it is still Chakra, and there will still be rejection and conflict if you try to merge it with your soul.
However, this rejection and conflict, because of the construction of the Soul Space, becomes a kind of tempering for the soul. In this tempering process, the Chakra will still be slowly absorbed and integrated by the Soul Space, which can effectively enhance the strength of the soul.
With this, Uya had completely completed the Second Stage of the Soul Secret Technique!
"This speed is a little slow; let's see if we can improve it."
Having completed the Secret Technique and sensing his soul gradually strengthening, Uya calmed his joy and began to try to increase the speed at which his soul fused with Chakra.
Uya released a little more of his suppression, and the wisp of Chakra that was constantly overflowing from the purple sphere suddenly became thicker, and the Chakra spreading throughout the entire Soul Space also became thicker.
However, this also caused a slight instability in the newly established Soul Space, which could barely be maintained under Uya's forceful control.
Gradually, the Soul Space adapted to this level of Chakra fusion and became stable again.
"It seems that this is the only way to temper the soul for now, but as the Soul Space becomes more stable, the speed should be able to continue to increase."
Sensing the situation in the Soul Space and the state of his own soul, Uya nodded and stopped releasing the suppression, maintaining the current level.
The purple sphere was completely suppressed, with only a Chakra constantly overflowing and merging with the Soul Space, tempering Uya's soul.
After sensing the amount contained within, Uya estimated that at this rate, it would take several years to fully absorb it. However, the speed could likely be increased during this process, so the exact time was still impossible to calculate.
"The progress is slow. Even if I fully absorb it, it probably won't bring about a qualitative transformation in my soul, preventing me from opening the Seventh Gate of the True Eight Gates Released Formation... But this is within expectations."
"Next, I should take some time to go to Rōran and suppress and absorb that Dragon Vein as well. With the Chakra contained in that Dragon Vein, there shouldn't be any problems."
After a few thoughts flashed through his mind, Uya withdrew from the Soul Space, and his consciousness returned to his body.
He doesn't need to consciously distract himself to control it; once it's set up, the technique can operate continuously anytime, anywhere, just like when Uya cultivated the Sage Body.
Uya's training only lasted for half a month, but after Uya left the training room, he received some unexpected news.
The Third Shinobi World War is over!
Of course, this was not unexpected; it should have ended long ago. What truly surprised Uya was an event that occurred in the final days after the Third War.
This event also directly led to the complete end of Third Shinobi World War.
That was the Fourth Kazekage of Sunagakure, who died at the hands of Konoha's White Fang Hatake Sakumo!
However, it is regrettable that the Kazekage is, after all, one of the Five Kage. Even if he is the weakest of the Five Kage, he still possesses many powerful forbidden techniques Secret Technique.
Not everyone can be like Uya, capable of killing Kage Level expert with the flick of a finger.
After Hatake Sakumo forcefully killed the Fourth Kazekage, he himself was attacked by the Fourth Kazekage's forbidden technique before his death, ultimately perishing together with him.
Despite this, the title of " Konoha's White Fang " still propelled him to the top of the Shinobi World, second only to the Five Kage Five Kage, and even comparable to them!
Uya rose to fame in the Shinobi World during the Second Shinobi World War, and by the time of the Third Shinobi World War, he had become the undisputed ruler of the Shinobi World.
While Hatake Sakumo couldn't compare to Uya's rapid rise, if we disregard Uya's somewhat unique existence, he could still be considered an extremely dazzling figure in the Shinobi World.
He became famous throughout the Shinobi World during Second Shinobi World War, and in Third Shinobi World War he even killed the Fourth Kazekage, achieving the feat of slaying a Kage and making everyone remember the title of Konoha's White Fang!
"I never imagined it would end like this."
Uya sighed softly, recalling the past. He still respected Hatake Sakumo, after all, Hatake Sakumo had once guided him, and on the battlefield of Second Shinobi World War, he had joined forces with him to fight against the Third Tsuchikage Ōnoki.
Compared to the original story where he died quietly in his own home, his current death on the battlefield, in which he perished alongside the Fourth Kazekage, making him a respected hero in Konoha, is undoubtedly much better.
Moreover, like the Third Hokage, Hatake Sakumo was already nearing his peak, and would gradually age after that.
Rather than passing away due to old age, this glorious end accompanying the Third Shinobi World War is more fitting for the title of Konoha's White Fang!
"Time... is also an enemy." Uya gently clenched her fist, raised her head, and looked out the window at the distant sky. "I will never lose to any enemy!"
Konoha, this is a place to commemorate the dead.
The Hokage's portrait will be engraved on the Hokage Rock, existing forever with the village, while the names of those who died on the battlefield will be engraved on Memorial Stone.
The most special ones will have a separate monument, like the one for Uya back then.
Of course, Uya's incident was just a joke.
At this very moment, before a monument engraved with the title of Konoha's White Fang, Uya stood quietly, holding a wine cup in his hand, gently pouring wine into it.
Although everyone must die, and not everyone can become an immortal being like Princess Kaguya, Uya still cannot completely let go of the death of someone he cares about.
In the Ninja World, life and death are actually very insignificant matters, especially with Ninjutsu like the Impure World Reincarnation and the Rinne Rebirth that can control life and death. For a ninja like Hatake Sakumo, dying on the battlefield and taking down a Kage together is even something to be proud of.
After standing in front of Hatake Sakumo's monument for a while, the image of Hatake Sakumo instructing him flashed through his mind. Uya's Shockwave Sensing rippled outwards, enveloping Konoha. After sensing a particular scene, Uya slowly turned and left.
In a training field, Kakashi Hatake, gripped a short sword in both hands and swung it repeatedly.
A faint flow of Chakra seemed to be circulating on the short sword.
Unlike in the original story, Kakashi was not discouraged by Hatake Sakumo's death. Instead, he felt proud of his father and trained even harder, wanting to catch up with Hatake Sakumo.
Kakashi was the only one in the empty training ground; Minato Namikaze wasn't there, presumably busy with something else.
Moreover, Kakashi had already become Jonin, and his self-created Chidori was no less powerful than Minato Namikaze Rasengan. Therefore, even Minato Namikaze didn't have many people left who could teach Kakashi.
After practicing for a while, Kakashi stopped, suddenly turned his head as if sensing something, and looked to his side and behind him.
There, a figure appeared as if out of thin air, or as if it had been there for a long time, causing Kakashi's pupils to shrink suddenly, his heart filled with immense surprise.
Who could have gotten so close without him noticing?! (To be continued.)