Anko could not believe it; Yeyu's space-time ninjutsu was actually the Flying Thunder God.
This was an S-rank forbidden jutsu, one that her teacher, Orochimaru, had attempted to learn back in the day.
He just never mastered it.
Yeyu handed the Kunai to Anko and said, "What is there to be so surprised about?"
Anko looked at Yeyu's calm expression, speechless. "This is an S-rank forbidden jutsu. Only the Fourth Hokage in all of Konoha knows it. Do you know the reputation of the Fourth Hokage's Yellow Flash?"
"It comes entirely from the Flying Thunder God."
"And yet, after all these years, he is the only one who has ever mastered it."
The Fourth Hokage held immense prestige in the hearts of the generation of ninjas Anko belonged to.
After all, they were exactly the right age to have participated in the Third Ninja World War.
They constantly heard news of Minato Namikaze's victories on the battlefield.
Back then, to ninjas of Anko's generation, Minato Namikaze was a god-like existence.
And Yeyu had actually mastered this legendary ninjutsu.
"You, you really know the Flying Thunder God?"
Anko still couldn't believe it; she wanted to confirm it one more time.
This ninjutsu was simply too difficult, and she couldn't fathom that Yeyu, who had only just graduated from the Ninja Academy, had already learned it.
Even if his strength was formidable.
There was no shortage of powerful ninjas in Konoha, but no one had learned this technique since the death of the Fourth Hokage.
Yeyu nodded. "I do."
Mastering the Flying Thunder God was not something Yeyu considered worth making a fuss about.
When he previously told the Third Hokage that he had mastered three ninjutsu, the Third hadn't shown much surprise either.
In truth, the Third had been quite shocked at the time, but he simply hadn't let it show too clearly.
This made Yeyu feel that the jutsu was just average.
Furthermore, Yeyu hadn't used the Flying Thunder God in his own battles, so he didn't feel it was particularly important to him.
Having received Yeyu's confirmation, Anko remained silent for a long time, staring blankly at him.
Yeyu felt a bit helpless. "Alright, stop spacing out. Teach me how to get to Ryūchi Cave."
Yeyu knew that to reach Ryūchi Cave, besides physically searching for its location, one could also travel there via reverse summoning.
However, without a signed contract, lacking coordinates could result in being lost in the turbulence of space-time.
Anko snapped back to reality and looked at Yeyu. "But you haven't even been out of the Ninja Academy for two months, have you?"
"Where did you find the time to train in such a difficult forbidden jutsu?"
"Did you start learning this technique while you were still in the Ninja Academy?"
Thinking about how Yeyu was promoted to Chunin by the Third immediately upon graduation, and even appointed as Hokage Assistant, Anko's imagination ran wild. She assumed the Third had valued Yeyu since his academy days and had been grooming him ever since.
Yeyu frowned. "Why are you still thinking about that?"
"Regardless of how much time it took, isn't it enough that I learned it?"
"By the way, to go to Ryūchi Cave, I definitely need to sign a summoning contract with them first, right?"
"That's the only way to have the coordinates to use reverse summoning."
Anko looked at Yeyu's lack of reverence for the Flying Thunder God and wanted to say something.
But then she remembered that he had mastered the technique, while she didn't even understand the principles behind it.
What right did she have to lecture him?
Perhaps a technique that was impossibly difficult for her, or even impossible to learn, was simply easy for Yeyu?
After all, Yeyu's strength was immense and his talent was off the charts.
However, her assessment of Yeyu had just jumped several levels.
Mastering the Flying Thunder God and not mastering it were two completely different tiers.
Mastering the Flying Thunder God meant that Yeyu would not easily die in future battles.
Combined with his ridiculously powerful offensive capabilities, Yeyu's strength might have already surpassed the Kage level.
At this thought, Anko's eyes widened in shock. "You're only 12, and you already possess strength beyond the Kage level. I can't imagine how strong you'll be by the time you're 20."
"No wonder the Third values you so much and made you the Hokage Assistant directly."
"I have a feeling the Third intends to groom you as his successor."
Connecting the events surrounding Yeyu, Anko immediately deduced the Third's intentions.
Yeyu stood up and walked over to Anko. "Sister Anko, your brain actually works pretty well. Now, hurry up and tell me how to sign a summoning contract with Ryūchi Cave."
Anko looked at Yeyu. "So, your first mission is with me, and the future Hokage's first mission was also carried out with me?"
Anko found it hard to believe.
Could this immature guy in front of her really become the Hokage one day?
Yeyu sighed. "If you have any other questions, ask them all now. Otherwise, you definitely won't let me know how to sign a summoning contract, right?"
The two of them had been on different wavelengths since the start.
Anko shook her head. "No more questions. Are you actually planning to head to Ryūchi Cave?"
"That place is extremely dangerous."
"Orochimaru nearly died there back in the day."
Yeyu was unaware of this.
"He nearly died? What happened?"
Anko thought for a moment and said, "Orochimaru wanted to learn senjutsu back then, but he failed the trial and was almost eaten by the White Snake Sage."
"It was fortunate he knew many escape ninjutsu, otherwise there would be no Sannin."
Yeyu hadn't expected such a story.
"No wonder Manda had so little respect for Orochimaru. Aside from Manda's personality, it probably also looked down on Orochimaru for failing the assessment."
In Ryūchi Cave, if you want to learn senjutsu and fail the assessment, you get eaten by the giant snakes.
Whether it's the senjutsu training at Ryūchi Cave or Mount Myoboku, the consequences of failure are quite grim.
At Ryūchi Cave you get eaten, and at Mount Myoboku you get turned into a toad stone statue.
As for the outcome at Shikkotsu Forest, Yeyu didn't know, but he guessed it wouldn't be any better than Ryūchi Cave or Mount Myoboku.
However, Yeyu didn't intend to learn senjutsu when entering Ryūchi Cave; he only wanted to subdue a few giant snakes to serve as his summoning beasts.
He had no interest in ordinary snakes, and Manda was Orochimaru's summoning beast, so Yeyu had no interest in it either.
Aoda or Garaga would be good; neither of these two giant snakes currently had a contractor.
Both of these snakes possessed decent strength, and according to the original lore, they were actually stronger than Manda.
As for why Manda gave the impression of being stronger, it was likely because Manda appeared more frequently and had a more volatile temper.
Aoda didn't seem as strong in the later stages, but that was mainly a personality issue, and it was forced to participate in Ten-Tails level battles the moment it appeared.
In battles like those, it didn't really matter who showed up.
Anko looked at Yeyu. "You aren't planning on learning senjutsu, are you?"
She was worried that Yeyu might not be able to resist the temptation and would go to Ryūchi Cave to learn senjutsu.
The senjutsu of Ryūchi Cave was indeed very powerful, perhaps even far stronger than that of Mount Myoboku.
One could tell just by looking at Kabuto Yakushi; the stamina of Mount Myoboku's senjutsu was completely lacking, yet Kabuto Yakushi's senjutsu could last for several days.
Furthermore, the senjutsu of Ryūchi Cave focused on genjutsu, which could actually fill the gap in Yeyu's repertoire.
This was the reason for Anko's concern.
The senjutsu of Ryūchi Cave and the current Yeyu were simply too complementary.