Seeing that the red light sphere was actually the strongest Mangekyō Sharingan technique, Kamui, Yagyu's face lit up with joy once again.
Earlier, his attention had been entirely focused on the colorful light sphere, causing him to subconsciously overlook the red light sphere of the Kekkei Genkai level.
Now, coming back to his senses, Yagyu realized that the drop rate this time was incredibly lucky.
Both Kamui and the Sword of Nunoboko were items of the Six Paths level.
Just like how Sakura's chakra control, though only at the blue level, was no less effective than the red light sphere, it was one of the key factors that helped Yagyu build a solid foundation during his weaker days as a ninja.
Similarly, the reason why Obito Uchiha's Kamui was hailed by countless netizens in Yagyu's previous life as the strongest Mangekyō Sharingan technique was its ability to challenge opponents far beyond its level.
And not just by one or two levels, but by an entire dimension.
The Mangekyō Sharingan is the primary evolution for the Uchiha clan to advance from elite Jonin to Kage level, and even to the level of the Five Kage.
However, since the Mangekyō Sharingan's ocular power is not infinite, Uchiha clan members who awaken it, despite being top-tier Kage level fighters, rarely use its exclusive techniques.
Moreover, the exclusive techniques of the Mangekyō Sharingan vary in strength. Among them, Kotoamatsukami is something that even the higher-ups of Konoha and the Five Kage would find incredibly intimidating, even to the point of unease.
But Yagyu, who had already transplanted Kotoamatsukami, didn't believe this exclusive technique would have much effect on those at the Super Kage level, because willpower is something with both incredibly high and low limits.
Just like how Obito Uchiha, who was only at the level of an elite Jonin, could suppress the Ten-Tails' violent will and become its Jinchūriki.
Every Super Kage level fighter has reached the limits of human potential, with unshakable willpower.
Take Hashirama Senju, for example. Orochimaru, the caster of the Edo Tensei, couldn't control him at all.
Or Madara Uchiha, whose will was so firm that Naruto's Talk no Jutsu had no effect, as he was determined to sever the world's cause and effect.
Against such individuals, unless one's Yin Release chakra reaches a level of dimensional suppression, Kotoamatsukami would be utterly ineffective.
This is why, before Yagyu reached the Six Paths level, he didn't even consider using Kotoamatsukami against Madara Uchiha's Edo Tensei body.
Even after reaching the Six Paths level, he didn't think of using Kotoamatsukami on Obito Uchiha.
Because he was well aware that Kotoamatsukami would be useless against these two individuals with unshakable willpower, unless Obito Uchiha reverted from being the Ten-Tails Jinchūriki to his original form.
Not just Kotoamatsukami, but even the genjutsu of Kurenai Yūhi, Yagyu didn't use.
Against opponents from another dimension, unless it's a genjutsu of the Kekkei Mōra level, it would have no effect.
Thus, in Yagyu's eyes, the Kotoamatsukami that was hyped to an absurd degree in his previous life was far inferior to the Eight Thousand Spears of Hikari Uchiha.
After all, when used in conjunction with Tsukuyomi, the Eight Thousand Spears was a weakened version of the Infinite Tsukuyomi and the Divine Tree's Descent, capable of instantly absorbing the chakra of all those marked, equivalent to Kaguya Ōtsutsuki using the Infinite Tsukuyomi and the Divine Tree's Descent to reclaim chakra.
However, for the Eight Thousand Spears to reach the level of the Infinite Tsukuyomi and the Divine Tree's Descent, a lot of preparation was needed. Thus, in Yagyu's eyes, it could only rank second at best.
In Yagyu's mind, the number one exclusive technique had to be Obito Uchiha's Kamui.
But it had to be the Kamui of both eyes to be considered the best in Yagyu's eyes.
If it was just a single Kamui, whether it was Kamui intangibility or Kamui space distortion, it would only be a powerful and troublesome technique, far from being able to transcend an entire dimension.
The power of the dual Kamui had already been proven by Kakashi Hatake, who temporarily received Obito Uchiha's soul in the original story.
Kakashi Hatake, who was only an elite Jonin, managed to injure Kaguya Ōtsutsuki, a feat even more impressive than Naruto and Sasuke Uchiha.
Moreover, among all of Kaguya Ōtsutsuki's abilities, though she had several space-time techniques, she lacked the ability to distort space.
Even if she had the ability to distort space, it would be useless, as Kamui involves hiding in another dimension, leaving only a phantom in the outside world.
Even if space is distorted, it's only the phantom that's distorted, and it wouldn't harm the real body hiding in the other dimension.
To truly harm the real body, one would either have to wait for the Kamui user to make a mistake or, like Obito Uchiha searching for the other dimension, use a space-time technique to locate Kamui's dimension and enter it to harm the Kamui user's real body.
On the other hand, Kamui not only has the ability to distort space but can also overlay space-time power on ninjutsu, turning the power of the technique into something akin to Six Paths Sage Art, capable of even breaking through the defenses of a Ten-Tails Jinchūriki.
Its power and effectiveness are so great that it even surpasses the Six Paths Sage Art.
It is this combination of offense and defense that makes Kamui more deserving of the titles "Strongest Shield" and "Strongest Spear" than any other ninjutsu or ability.
If Obito Uchiha had been a bit more ruthless, taking back Kakashi Hatake's left eye Kamui, with half his body composed of Hashirama's cells, he could have easily crushed Nagato.
Yagyu hadn't even risen to prominence yet, and Obito had already achieved his dream.
Unless Black Zetsu could instantly kill him, both Madara Uchiha's and Black Zetsu's plans would be ruined.
Space-time power is just that unstoppable.
It doesn't belong to the Yin-Yang or the Five Elements, yet it surpasses them.
Unfortunately, there is no "if"!
It was precisely because the "if" version of Obito Uchiha was too unstoppable that the original author had to nerf him. After becoming the Ten-Tails Jinchūriki, he could no longer use the most unstoppable Kamui intangibility, making his weaknesses and flaws glaringly obvious, which ultimately allowed Yagyu, who stood above everyone else in the narrative layer, to prevail.
In Yagyu's eyes, even if the game system gave Kamui a gold or colorful light sphere, it wouldn't be an exaggeration.
The Kamui, which only received a red light sphere, was undoubtedly the top-tier red light sphere, far surpassing Kotoamatsukami and the Eight Thousand Spears.
Besides Kamui, the Sword of Nunoboko was also an incredibly powerful ability, as evidenced by its being on par with the Rinnegan's Limbo.
In Japanese mythology from Yagyu's previous life, the Sword of Nunoboko was the spear used to create the first land, possessing the ability to open up the heavens and earth, stirring the chaos of the world.
In the Naruto world, the Sword of Nunoboko is the weapon of the Sage of Six Paths, known as the Sword of the Divine Path.
But in essence, it is actually a technique, one of the advanced applications of Yin-Yang Release.
Just like how the Rinnegan comes with many basic abilities, including Yin-Yang Release.
Perhaps because the Sage of Six Paths created the Sword of Nunoboko while he was the Ten-Tails Jinchūriki, it was imprinted by the Ten-Tails, so anyone who becomes the Ten-Tails Jinchūriki and has the talent to cultivate and use this technique would gain the ability of the Sword of Nunoboko.
Obito Uchiha, who suppressed the Ten-Tails' violent consciousness, was hailed by countless netizens in Yagyu's previous life as the man with the strongest will in the ninja world.
Before he wavered, the strength of his will and spirit was beyond measure.
Thus, though he couldn't use the various Kekkei Mōra and god-level techniques that only Six Paths Madara and Kaguya Ōtsutsuki could use, he gained the advanced Yin-Yang Release technique of the Sword of Nunoboko.
Yin-Yang Release is a technique that can create everything from nothing and give life to all things.
Its potential is so high that it's no less than the supreme ocular techniques like the Rinnegan.
Most of the Ōtsutsuki clan's use of Yin-Yang Release is to create Truth-Seeking Balls or for other purposes.
But the Sage of Six Paths, through his development of Yin-Yang Release, even without being the Ten-Tails Jinchūriki, could possess the top-tier strength of the Six Paths and freely travel between the worlds of the living and the dead, as if he had become the will of the planet and the world.
The Sword of Nunoboko is a sword of the heart, a technique of Yin-Yang Release that attaches the power of will and spirit to a weapon.
Just as Kotoamatsukami is ineffective against those with strong wills.
Willpower is an intangible force that fluctuates up and down, impossible to quantify.
Yin-Yang Release, on the other hand, materializes this intangible force into a tangible form, unleashing a power called "miracle."
The stronger the heart and the firmer the will, the more powerful the Sword of Nunoboko in one's hands, enabling one to challenge stronger opponents and turn the impossible into possible.
If the original Obito Uchiha hadn't seen a reflection of himself in Naruto and thus wavered in his heart.
Even if Naruto and Sasuke Uchiha had teamed up at that time, they wouldn't have been able to withstand a single strike from him.
This man with the strongest will in the ninja world didn't lose to the reincarnations of Asura and Indra, but to his former self.
One of the reasons Yagyu killed Obito Uchiha so quickly was to prevent him from using the Sword of Nunoboko.
Though the Flying Thunder God Technique would keep him invincible, the power of the heart and will, like space-time power, is unstoppable.
When the numbers go off the charts, it's as absurd as the protagonist's plot armor.
And now, this advanced Yin-Yang Release technique, the Sword of the Divine Path, the strongest weapon in the ninja world, had also fallen into Yagyu's hands.
With the strongest eye technique, Kamui, and the strongest weapon, the Sword of Nunoboko, Yagyu had even less reason to fear the Sage of Six Paths, whether friend or foe.
Without hesitation, Yagyu fused the two light spheres.
As a red and a colorful beam flew out of his spatial inventory and merged into his body.
Yagyu immediately felt a new exclusive technique awaken in his eyes.
Feeling the information about this technique, Yagyu couldn't help but smile.
As he had expected, the Kamui he had obtained wasn't Kamui intangibility, but the exclusive technique of Kamui itself.
Unless Yagyu lost an eye, his left eye would be the offensive Kamui, while his right eye would be Kamui intangibility.
At the same time, the space-time power in Yagyu's eyes connected with a separate dimension.
That dimension was the Kamui dimension.
From Kaguya Ōtsutsuki's Amenominaka, it's clear that the ninja world contains numerous dimensions.
Even the sacred lands like Mount Myōboku might also be dimensions.
These dimensions are connected to the planet, with unknown special entrances, and can also be found using space-time power.
The Kamui dimension is one of them.
Perhaps due to his Yin-Yang Release or his elevated state, Yagyu instantly mastered Kamui and had a feeling.
Even if the Kamui dimension were destroyed, he could use Yin-Yang Release to create a new dimension or take over an existing one, turning it into the new Kamui dimension.
"Creating dimensions..."
Yagyu muttered these words, then suddenly looked up at the moon, a slight smile on his lips.
Creating dimensions was indeed possible.
The Tenseigan, on par with the Rinnegan, had such an ability.
With the power of Yin-Yang Release, as long as it was developed to an advanced level, it could also achieve this.
The information about Kamui suddenly reminded Yagyu that there was still a treasure on the moon.
Additionally, the method of materializing will through Yin-Yang Release, the Sword of Nunoboko, also surfaced in Yagyu's mind.
Digesting this information, Yagyu couldn't help but marvel inwardly.
The Sage of Six Paths truly lived up to being his imaginary enemy.
Yagyu wasn't afraid of Kaguya Ōtsutsuki, as this woman was just a powerful airhead.
In contrast, the Sage of Six Paths was more like a mastermind, a true boss.
If only Ten-Tails Jinchūriki and Six Paths level fighters could live forever, this planet would be his playground.
Even without immortality, the Sage of Six Paths could have his soul survive to this day, interfering with the world of the living as a spirit.
Though a creation of Kaguya Ōtsutsuki, he could reach her level through his own talent and ingenuity, even without consuming the Chakra Fruit.
It must be said, the Sage of Six Paths is the Saiyan hybrid of the Naruto world.
Even among the pure-blooded Ōtsutsuki from outer space, few could compare to him.
After all, those pure-blooded Ōtsutsuki were all powered up by drugs.
Who could have imagined that Yin-Yang Release, an auxiliary technique, could create abilities no less than exclusive ocular techniques, even Kekkei Mōra and divine techniques?
The three-color light sphere level judgment is well-deserved!
"Hmm?"
Just as Yagyu was about to show off his new toys, about to use Yin-Yang Release to form the Sword of Nunoboko and test its power.
Suddenly, he seemed to sense something and couldn't help but look in a certain dark direction, a slight smile on his lips. "Finally making your appearance? I've been waiting for you... Six Paths Madara!"
After sixteen years of crossing, from a baby to a child, then from a child to a teenager, and from a weakling to the strongest...
Yagyu, who had awakened the game system, seemed to have finally leveled up to the max, standing at the entrance of the ultimate dungeon, about to face the strongest boss of the current version.
Thus, Yagyu swiftly flew in the direction of the presence.
In a part of the massive crater that covered one-third of the Land of Rain, a figure visibly turned white.
The tattered red armor transformed into a white robe, the black hair and skin also turned snow-white, nine black orbs floated around him, and in his hand was a black staff. His eyes had no pupils or whites, only purple and ripples filling the sockets, emanating astonishing ocular power.
This person was none other than Madara Uchiha, who had survived the explosion of the nine Truth-Seeking Balls.