The gap between an ordinary Three-Tomoe Sharingan and a Mangekyo Sharingan is not small. A Three-Tomoe Sharingan is already quite rare.

However, out of a hundred Three-Tomoe Sharingan, not even one pair might evolve into a Mangekyo Sharingan. Kazuki highly suspected that the Uchiha clan in Konoha currently doesn't even have a single Mangekyo Sharingan.

He didn't know if the clan head had awakened the Mangekyo Sharingan, but it was highly probable he hadn't.

What Kazuki can do now is accumulate his ocular power as much as possible.

He has suspected that the Mangekyo Sharingan was actually a product of bloodline degeneration.

Hagoromo's ocular power, when he had the Three-Tomoe Sharingan, already reached the level of a Mangekyo Sharingan, and it was even the Eternal Mangekyo Sharingan type.

When Indra awakened the Mangekyo Sharingan, he could use the complete Susanoo, which was a sign of Eternal Mangekyo Sharingan.

But later, the Uchiha developed a distinction between the Mangekyo Sharingan and the Eternal Mangekyo Sharingan, which is solid proof of bloodline regression.

Indra seemingly only inherited the Sage Eye, but if Indra were compared to the so-called Sage Body users in the current Ninja World, he would resemble a Sage Body more. This is certain, as Indra, at the end of the day, was Hagoromo's son.

As anticipated, it was difficult for Kazuki to defeat Gaara head-on.

He is now gradually incorporating the Flying Thunder God Technique into his combat. Theoretically, he, having mastered the Flying Thunder God Technique, seems to hold an undefeated position.

If he can't win, he can just leave.

However, the battlefield in the combat arena has a spatial limit, and Gaara's forte is area-of-effect attacks. Kazuki struggled, but ultimately lost to Gaara.

A Kage is indeed a Kage. Even with the Flying Thunder God Technique, Kazuki still couldn't defeat Gaara for now.

And when facing Itachi, he struggled, but Itachi's overall strength was even greater than Gaara's, so Kazuki ultimately lost.

Kazuki was not disheartened by this. Before the battles, he had already anticipated that he was not yet their opponent.

However, fighting against two Kage-level experts was a good training experience for him.

He indeed learned a lot from his battle with Itachi. If he can fully digest these learnings, his strength will improve significantly.

"Grandma Mito, this is the Rasengan I created based on the Tailed Beast Bomb."

Kazuki, in front of Mito, Tsunade, Nawaki, Kushina, and others, formed a Rasengan with one hand.

This scene made everyone turn their heads in surprise.

Kazuki really did manage to research it, and it only took him a little over a month, by all accounts.

When did creating Ninjutsu become so simple?

"This is almost the ultimate result of Chakra shape transformation." Mito's eyes flashed with a glimmer of light upon seeing it.

"The compression of Chakra is incredibly powerful. The Chakra consumption of the Rasengan is even higher than that of Chidori."

"Plus, it's a hand-seal-less, instant Ninjutsu. This is another A-rank Ninjutsu."

"Another A-rank Ninjutsu?" Tsunade was at a loss for words, not knowing how to react.

When did A-rank Ninjutsu become so easy to create?

And it only took a little over a month from the start of creating this A-rank Ninjutsu to its completion.

"If granduncle saw you, he would be very happy." Tsunade looked at Kazuki with complex emotions.

Tsunade actually felt that Kazuki was quite similar to Tobirama.

Both were geniuses, both possessed political wisdom, both could use the Flying Thunder God Technique, and both were skilled at creating Ninjutsu.

Indeed, Kazuki was the successor to her granduncle.

However, Tsunade's words caused a subtle shift in the hearts of Mito and Kazuki.

If Tobirama were to know about this, he would probably be so angry he'd rise directly from his grave, wouldn't he?

After all, Kazuki was still an Uchiha. It would be miraculous if Tobirama could be happy about it.

If Tobirama had truly treated the Uchiha fairly, then the one to inherit the Third Hokage position would very likely have been Kagami, not Hiruzen.

"Perhaps, but the Ninjutsu isn't completely finished yet. This is just an incomplete Ninjutsu." Kazuki said, adding more Chakra into the Rasengan.

In an instant, the Rasengan grew from fist-sized to basketball-sized.

"This is the Giant Rasengan after increasing the Chakra input. Don't just look at the increase in size. In reality, the Chakra consumption and the requirements for Chakra control are extremely strict." Kazuki sighed.

Sakura's Chakra control talent was truly excellent.

"I probably couldn't even handle that much Chakra." Nawaki's face turned pale as he looked at the Giant Rasengan.

His Chakra reserves were actually considered excellent among his peers, but seeing the Giant Rasengan, Nawaki knew that he couldn't handle it at his current level.

"Most ninjas indeed cannot use it. Even if your Chakra is sufficient, your Chakra control is still far from meeting the requirements." Mito looked at Nawaki with a hint of disappointment.

The Rasengan, and so on, was the most suitable Ninjutsu for Nawaki at the moment, but Nawaki's Chakra control was just a little bit lacking.

Why wasn't Kazuki her grandson?

If he were, she could probably die with a smile.

With Kazuki, Konoha could be guaranteed to be problem-free for decades.

Of course, all of this was predicated on resolving the hidden mastermind. Otherwise, unless Kazuki grew to Madara's level, it wouldn't be enough.

Although Kagami was not as strong as Izuna back then, his strength was still considerable, yet he was still killed by the opponent.

Even if it meant fighting to the death, she had to eliminate this unstable factor.

"Kid, try the power of this Ninjutsu."

Tsunade found a dummy from the warehouse, placed it not far from Kazuki, and motioned for Kazuki to use the Giant Rasengan on it.

The Giant Rasengan was pressed against the dummy, and in a blink of an eye, the dummy was smashed to pieces, turning into fragments.

"A very good Ninjutsu." Tsunade remained silent for a long time before finally speaking.

The dummy's strength was even greater than that of a real human body. Kazuki destroyed the dummy, which showed the power of this Ninjutsu.