Yeyu returned to the Hokage Office.
The Third Hokage smiled and asked, "How was it? What do you think of Kakashi's assessment method?"
Yeyu sat back in his seat. "Didn't you see it all yourself?"
The Third Hokage was not surprised.
"Was that jutsu you used also something you created yourself?"
Yeyu looked at the documents in his hand and nodded nonchalantly.
"That is truly a powerful jutsu. I was wondering why you never chose any five-element jutsus."
"So it turns out you had already developed your own."
The Third Hokage was not shocked; given Yeyu's talent, it was not strange for him to create a few Fire Release jutsus.
After becoming a Hokage assistant, Yeyu did not need to go out on missions like his peers from the same class.
Every time they came to the Hokage Office to receive missions, they would see Yeyu.
However, back at the Ninja Academy, Yeyu had not been close to them.
They had barely exchanged a few words.
After a period of calm, the Third Hokage asked Yeyu, "How many of those three jutsus have you mastered?"
More than a month had passed.
Yeyu was organizing files and paused for a moment.
The Third Hokage had not asked about his training progress during this time.
He had assumed the Third Hokage did not care about the matter.
"I have mastered them all."
He said it very calmly.
Now it was the Third Hokage's turn to be stunned.
"Mastered them all?"
Yeyu nodded.
After confirming it several times, the Third Hokage was dumbfounded. "You mean to say that you have also learned the Gate of the Great God and the Flying Thunder God?"
Yeyu nodded. "Yes!"
The next moment, Yeyu appeared behind the Third Hokage.
The Third Hokage's eyes widened. "It's real."
"Did you just mark the coordinates nearby?"
Yeyu teleported back to his seat.
"No, I modified the Flying Thunder God. When used at close range, I can use my sensory perception to determine the coordinates."
In reality, he was using Observation Haki.
Yeyu's Observation Haki was at the top level, possessing both a vast range and high precision.
It was extremely accurate for establishing coordinates for the Flying Thunder God.
As long as Yeyu's Observation Haki could cover an area, he could use the Flying Thunder God.
The Third Hokage remained silent for a long time.
"Your talent is truly monstrous."
Even a genius like Minato Namikaze required several years to master the Flying Thunder God.
Yeyu had actually mastered it in just over a month.
And he had even modified it.
That was an S-rank forbidden jutsu; Yeyu was incredibly bold, completely fearless of death, and his talent was even more terrifying.
Returning to his seat, Yeyu refocused his attention on the documents in his hand.
Mastering three S-rank forbidden jutsus was no big deal to him.
It only proved that Akainu had a strong learning ability.
Yeyu's own learning ability was also strong; previously, it was only because his physique was too poor that his strength improvement was extremely limited, no matter how strong his learning ability was.
Looking at Yeyu, the Third Hokage sighed with emotion. "Ever since the Second Hokage created the Flying Thunder God, only Xidai has fully mastered it. Aside from him, no one else has completely grasped it."
"You can be considered the third person to fully master it."
"But the Gate of the Great God should require Wood Release, right? How did you learn it?"
Yeyu looked up and explained, "The Gate of the Great God actually uses Yin-Yang Release. The reason the First Hokage's Gate of the Great God contained Wood Release was because he infused Wood Release into it."
"But the original Gate of the Great God should only consist of Yin-Yang Release."
The Third Hokage was unaware of this.
"One can infer as much from the principles of this ninjutsu."
The Third Hokage had studied the Gate of the Great God, and after a moment of reflection, he realized Yeyu's deduction was indeed correct.
But this also meant that Yeyu's Yin-Yang Release was incredibly powerful.
Back in the day, he hadn't failed to attempt learning this ninjutsu, but he had failed every time.
It was simply because his Yin-Yang Release was not strong enough.
Although this was a matter worth rejoicing over.
The Third Hokage felt less excited than he had been before.
During this period, Yeyu had given him too many surprises.
It made him feel that Yeyu mastering three S-rank forbidden techniques was only natural.
Yeyu himself didn't pay it any mind.
To him, these three ninjutsu were indeed of little use.
"Kakashi sensei taught me the Lightning Blade and the Rasengan, saying he wanted me to use them in conjunction with the Flying Thunder God."
The Third Hokage chuckled, "And have you mastered them?"
Yeyu nodded.
"The Rasengan was created by the Fourth Hokage, and it is indeed meant to be used in tandem with the Flying Thunder God."
"However, the Lightning Blade is Kakashi's own ninjutsu; he certainly has a bit of a selfish motive there."
The Third Hokage teased Kakashi.
Yeyu didn't see it that way, "I'm the one who profited; after all, the Lightning Blade is an S-rank ninjutsu."
Although the Lightning Blade and the Chidori are the same type of ninjutsu, the power of the Lightning Blade is far greater than that of the Chidori.
That is why the Chidori is an A-rank ninjutsu, while the Lightning Blade is an S-rank ninjutsu.
During this time, Yeyu hadn't gone to look for Kakashi.
But Kakashi had come to find him many times.
The Lightning Blade and the Rasengan were also strongly recommended by Kakashi after he learned that Yeyu had mastered the Flying Thunder God.
Yeyu hadn't been able to refuse.
Not only the Rasengan, but Yeyu had even developed the Rasenshuriken.
For him, it held no difficulty at all.
His chakra reserves were so vast that he could throw the Rasenshuriken as if it were an ordinary shuriken.
Among the ninjutsu Yeyu currently mastered, aside from the Three Body Technique, there were five S-rank ninjutsu, two A-rank ninjutsu, and one B-rank ninjutsu.
The B-rank ninjutsu was the Shadow Clone Technique, and the other A-rank ninjutsu was the Multi Shadow Clone Technique.
Both were taught to him by Kakashi.
During this time, Kakashi had almost become Yeyu's personal instructor.
However, he truly regarded Yeyu as someone he trusted deeply, even teaching him techniques like the Lightning Blade and the Rasengan.
Of course, Kakashi had no idea that Yeyu could learn so quickly.
In just over a month, he had mastered the Lightning Blade and the Rasengan, and even developed the Rasenshuriken.
The Third Hokage nodded, "These two ninjutsu are indeed very powerful; that he could teach them to you shows he trusts you deeply."
"It is also because your talent is sufficiently strong; otherwise, these two ninjutsu are very dangerous. If you couldn't learn them, it wouldn't just be a failure, but a threat to your life."
"If it were anyone else, Kakashi wouldn't have taught them."
"If Naruto and Sasuke and the others knew, I fear they would be consumed by jealousy," the Third Hokage remarked with deep emotion.
At this moment, he felt somewhat grateful that Mizuki had chosen the location of the battle to be near Yeyu.
Otherwise, given Yeyu's personality, he feared it would have taken them a long time to discover Yeyu's true strength.
As the instructor for Sasuke, Naruto, and Sakura, Kakashi hadn't even taught them a single ninjutsu yet.
He hadn't even taught them the most basic chakra control.
Yet Yeyu had learned it all without a teacher.
Not just chakra control, but chakra shape transformation and nature transformation—he had mastered them all.
Yeyu was absolutely the ideal disciple Kakashi had always wanted.
It was just that Yeyu no longer needed an instructor at all.
Yeyu didn't say anything.
During this time, aside from when they came to pick up missions, Yeyu hadn't seen them at all.
After getting off work and returning home, Yeyu would stay inside.
He rarely came out.