As a scientist, Tobirama was trying to decipher the reasons behind Kazuki's mutation.
After ruling out all possibilities and variables, Tobirama could only attribute the cause to one thing: when Kazuki found the Sword of Totsuka and the Yata Mirror, the ancient Uchiha chakra that possessed him had changed something in Kazuki.
Could it be that this ancient Uchiha was a mixed-blood with the blood of the Kaguya clan?
"Tell me, is there a possibility that I am, after all, your creation, a product of your forbidden techniques, Tobirama?" Kazuki interrupted Tobirama's thoughts and said with a chuckle: "Not only have I acquired the Shikotsumyaku. Even when I saw Hyuga Hizashi's Byakugan, I felt something similar, as if I could awaken it... although it was weak. At first, I thought it was just an illusion."
Tobirama tensed, but before he could retort, Kazuki raised his hand in a silencing gesture.
"Relax, I'm not accusing you of lying to me. I'm just saying that, of all the hypotheses, this one seems the most plausible."
Kazuki crossed his arms and continued in an analytical tone: "Following Mito-sama's logic, you, in an attempt to resolve the problems with the Uchiha clan, created a forbidden technique through which you affected my body."
He paused, then added with a questioning look: "And knowing you… wouldn't it be weird if you didn't try something a little more… risky?"
Tobirama gulped as Kazuki continued to speak, as if he was unraveling the mystery piece by piece.
"If I was just the double reincarnation of chakra, there would be no reason for Uchiha Izuna's chakra, who was always equal in strength with you, to be completely suppressed by you within me. Furthermore, I have the Kekkei Genkai of the Uzumaki clan and have now awakened the Kekkei Genkai of the Kaguya clan. I even feel a slight connection with the Hyuga…"
"This isn't just a question of lineage. It's clear that, from my talent to my blood, there's something that doesn't add up."
Kazuki smiled wryly before delivering his final blow: "Even your sister-in-law and your disciple think that you have done something, Tobirama."
"And tell me, Tobirama, who do you think is responsible for my quirks?"
After acquiring the Shikotsumyaku, Kazuki made no attempt to hide the unusualness of his situation.
If absorbing a little bit of chakra was enough to acquire a Kekkei Genkai, even with the Chimera Technique, this explanation would be too weak.
So just admit it directly and let Tobirama take the blame and let him fill in the blanks himself.
If Kazuki forced an explanation, it might affect the final confrontation with Tobirama.
Tobirama took a deep breath. If this was a scientific experiment, he would have made a conclusion in the face of so much evidence.
All these things, one by one, were hinting that he was the mastermind behind the scenes.
But the problem was that he knew he was indeed innocent!
"Kazuki, from the moment you obtained that spiritual weapon from the Uchiha clan, extra chakra appeared in your body. Can you feel it, Kazuki? That relic is not common. It has the essence of an ancient Uchiha."
Tobirama seemed to be organizing his argument as he continued: "Legend has it that Senju, Uchiha, Kaguya, Hyuga, and Uzumaki are all descendants of the Six Paths Sage. These shinobi clans were originally one family with extremely close blood ties. It was only over time that they evolved into different shinobi clans."
"I think that since you have awakened the Shikotsumyaku and have a strange feeling for the Byakugan, that Uchiha is probably someone close to that era, and it is even possible that he was an Uchiha during the Sage of the Six Paths period..."
Tobirama, full of inspiration, found another argument.
"Look, the two spiritual artifacts that Uchiha left behind have an aura similar to the Six Paths Sacred Treasures I came into contact with. This shows that that Uchiha had a significant relationship with the Sage of Six Paths and was not simply someone with the Uchiha bloodline..."
Kazuki looked at Tobirama suspiciously.
In fact, it wasn't just Tobirama who was getting lost in his theories; if they continued like this, even Kazuki would start to get confused.
Do I really have a system or not?
Tobirama was so engrossed in his speculation that he nearly gave away Indra's identity, becoming the first detective in the shinobi world to decipher the secrets of the Uchiha clan without even reading the stone tablet.
"Tobirama, I feel like you're being too convoluted with your explanations…" Kazuki sighed. "Tell me, do you think I could be the reincarnation of the Sage of Six Paths?"
Tobirama waved his hand. "Impossible. Absolutely impossible. Unless you one day awaken the legendary Rinnegan."
Tobirama added sincerely: "I know you may doubt me, and I admit that I have had thoughts like the ones Mito mentioned in the past: creating an artificial chakra body to manipulate the minds of talented Uchiha... But I was unsuccessful. Really, Kazuki."
Kazuki could barely contain his grimace upon hearing this.
"My life has been like walking on thin ice, Tobirama…" Kazuki commented, thinking deeply. "Someone ancient and powerful, warriors of the Sengoku period… The chakra of so many figures from the past has accumulated in me. What have I done to deserve this?"
"I sometimes think, though I do not share Jiraiya's blind faith in the Child of Prophecy, that these strange experiences of mine seem to fit that explanation. It is as if fate really can be predicted."
"To top it off, I possess a dojutsu that allows me to glimpse the future. Tell me, Tobirama, do you think I will be able to reach the other shore of peace?"
Kazuki sighed, as if he was worried, and stopped talking to Tobirama.
Tobirama sighed as well, he had assumed that the chakra that possessed Kazuki had been from a simple evil ancient Uchiha. But now it seemed clear that this guy had an impressive background, and for sure he seemed to be more powerful than Uchiha Izuna.
In the silent war in Kazuki's body, the Uchiha clan seemed to have gained a general...
And the son of prophecy mentioned by Kazuki also made Tobirama think deeply.
Although he did not believe in the prophecy, the mysteries of Kazuki, the terrifying talents and opportunities, all seemed to match this statement...
...
Elsewhere in the Forest of Death.
The four Kiri-nin who were released by Kazuki looked at each other at this moment.
"Are you saying that Uchiha Kazuki used Shikotsumyaku?" Mei muttered. "Plus, there's my Boil Release and Lava Release... Who the hell is that guy?"
Jinzaburo was lost in thought, recalling the brief appearance of Kazuki's bone blade. His heart skipped a beat.
The intensity and purity of the Shikotsumyaku he had seen was unmistakable.
He finally understood why Kazuki had bothered to wake him up instead of killing him. It turned out that he was his half-brother with Kaguya clan blood...
"Terumi Mei, don't talk about your humble kekkei genkai, it's nothing more than the fusion of two chakra attributes!" Jinzaburo spoke in a low voice. "Kazuki-aniki, who has the noble blood of Kaguya and Uchiha, can copy it at a glance..."
"No wonder he told me that there is more to life than just fighting and killing, and even asked me to carry a message back to the Kaguya clan…"
Jinzaburo now understood too many things.
Convincing clan members who thought differently through force was a common practice in the Kaguya clan. However, Kazuki had used pain to teach him that his extreme way of thinking was not right. His intention was to let him experience how beautiful life could be.
This method, similar to that of a strict father, gave Jinzaburo, who had lacked affection since childhood, a strange feeling of caring.
He had to admit that with his previous way of thinking, if Kazuki had tried to persuade him gently, he would never have listened.
Only after being beaten, mercilessly and forcefully, was Jinzaburo able to force himself to consider other opinions.
"Are you saying that you plan to lead the Kaguya clan to defect from Konoha?!" Zabuza, coughing up blood, glared at him and said coldly: "I will report this to the Third Mizukage!"
Jinzaburo smiled as he waved his hand, showing a calm expression. "You'd better tell him that in times of war, the Kaguya clan will surely rebel. Let him send troops to exterminate us right now…"
"Ask him if, with war on the verge of breaking out, he dares to attack us."
"If he does, what will the other clans with kekkei genkai think? What naive thinking you have, kid!"
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