Hibari wasn't concerned at all about teaching Orochimaru these jutsu. As for whether the Jiongu jutsu and the 'Immortal Body' would change Orochimaru's mind and prevent him from developing the 'Immortality Technique' later, Hibari felt the possibility was slim.
After all, the 'Immortality Technique' was a jutsu Orochimaru developed to extend his own lifespan, but more importantly, it was a jutsu he created to seize the bodies of talented shinobi or those with the Sharingan.
When he developed the jutsu, he wasn't old enough to need it to prolong his life, was he? So the main motivation was to seize bloodlines. As long as Orochimaru remained interested in the Uchiha clan's Sharingan in the future, he would likely continue his research.
One could even say that the Necro Cult might become his motivation. After all, if he joined, he couldn't just reap the benefits without contributing, right? He would eventually have to develop something to enrich the school, and wouldn't the 'Immortality Technique' be a perfect choice then?
Besides, Orochimaru probably wouldn't be interested in a jutsu with such severe side effects as the 'Immortal Body,' nor would he have any ideas about the Jiongu jutsu. It was more likely that he would be very interested in other things like Edo Tensei, and that's what he would want to learn.
As for whether Hibari was overstepping his bounds by teaching Orochimaru, since Orochimaru was the direct disciple of the Third Hokage, Hiruzen, would his actions be inappropriate?
There was absolutely no need to worry about it. Not only was Hibari's relationship with Hiruzen very close, so there would be no rift between them, but there was also no written rule in the shinobi world that you could only have one teacher.
The future protagonist, Naruto Uzumaki, first followed Kakashi, then Jiraiya. The same went for Sakura Haruno and Sasuke Uchiha, who all later became disciples of the Sannin.
Furthermore, Hibari didn't plan to take Orochimaru on as an apprentice. He was just going to provide him with 'extracurricular tutoring,' just like he did when he taught Tsunade the Lightning Release Armor Jutsu.
Hibari had no mental burden, and Orochimaru had even less. Even though he was the Third Hokage's disciple, it didn't prevent him from getting 'tutoring.' Besides, his teacher, Hiruzen, had told him to ask Hibari for knowledge and advice before he came, so he had authorization.
Thus, the two of them hit it off immediately.
Hibari smiled and said, "I don't know if you're interested in our Necro Cult?"
Orochimaru was stunned for a moment, then said, "Hibari-aniki, you may have misunderstood. What I meant wasn't just that I wanted to study this Shiryōjutsu with you. I want to join the Necro Cult directly. Before I came to see you, I observed the cult's emblem and also read the pamphlet. I'm very interested in the things recorded on it. There are countless 'truths' in the world, and this might be one of them. I happen to have a strong desire to pursue and explore the truth!"
When Hibari heard that he hadn't even said anything yet, and Orochimaru was already ready to sell himself to him, he was very happy. He said with a laugh, "That's great. I was thinking of getting you to join, but now it seems I don't have to go through the trouble. However, our Necro Cult is still in its infancy. The things in those pamphlets are just my general ideas. They still need a lot of time to be refined. I've already sent people to find scholars of theology. When they come back, they'll be in charge of these things. If you have any good ideas or philosophies, we can all gather them and add them in."
It was a good thing to be able to pass on his philosophies and ideas in this way, so Orochimaru didn't refuse and said, "I will think about these things carefully."
"Good, that's enough. Let me give you a general overview. Although our Necro Cult is newly founded, we do have some followers. The young man who brought you to me just now, Hidan, is a follower. In fact, many people in this town under construction are prepared to join and believe in our Necro Cult, but we haven't officially processed it yet because we don't have enough people. However, counting you, we only have three core members. I'm one of them, the other you should also know is that guy Kakuzu, and the last one is you." Hibari said with a simple smile, introducing them to the Necro Cult.
Orochimaru nodded, expressing his understanding. After all, starting a cult wasn't a simple matter. Before recruiting followers and people, they really should organize the philosophies and other things, or it would be a mess.
After that, the two of them discussed these things for a while. Orochimaru also took the opportunity to ask Hibari about the difficult points of developing jutsu and some of the problems he had encountered. Hibari patiently answered all of his questions.
From these questions and his own answers, Hibari also figured out what that kid Orochimaru was doing. He was preparing to create his own school of ninjutsu. From the name 'Hidden Shadow Snake Hands,' Hibari knew that this was definitely the 'Snake School of Secret Jutsu' that Orochimaru would rely on in the future. The ultimate trump card should be the 'Eight Branches Technique,' right?
However, he didn't ask too many questions about this. He figured that Orochimaru probably hadn't thought that far ahead yet.
At the same time, Hibari also thought that if he had the chance, he would look at the jutsu that Orochimaru would develop in the future and see if he could categorize them into their Shiryōjutsu school, creating another branch called 'Serpentine Secret Jutsu' or something similar.
As it happened, Orochimaru also had these exact thoughts at this time. Although he was starting to develop the basic forms of these jutsu, he hadn't yet reached the deep level he would achieve in the future. But this also meant that he hadn't yet found a suitable direction for himself.
If it weren't for Hibari's actions, he would probably have started his own. But since Hibari had already laid the groundwork and created a path, he was prepared to hitch a ride and go along with it. After all, it was a win-win situation.
While he developed his own ninjutsu to fill in the gaps, he would definitely also learn some of the ninjutsu that Hibari had developed or use them as a reference. It wouldn't harm anyone. Furthermore, since he was now an 'insider,' working together to strengthen Shiryōjutsu and the Necro Cult was also a great choice, wasn't it?
In any case, these were all just thoughts in the minds of the two of them. They were simply cooperating with each other tacitly, and neither of them had yet spoken about it openly.
After answering many of the 'problems' Orochimaru had, Hibari seemed to remember the main topic. He picked up his teacup, took a sip, and looked at Orochimaru, saying, "I've been talking about so many side topics that I almost forgot about the main one. You said before that you came to me for three things. We've talked about two of them. So what's the matter that you want me to help you with? It's not just to answer these questions for you, is it?"
After arriving at the Undercity, Orochimaru had encountered so many new things, and then he was tricked into joining by Hibari. His mind was inevitably a little chaotic. Later, he was taught about his knowledge gaps by Hibari and was so immersed in the sea of knowledge that he couldn't get out. Therefore, Orochimaru had almost forgotten what he had come to ask Hibari for help with.
When Hibari brought it up, he came to his senses. He then remembered his original purpose and quickly said, "That's not it. I do have a rather troublesome matter that I would like to ask you for help with, Hibari-aniki..."
Hibari also became a little interested and said, "Tell me about it..."
"It's like this: after Tsunade obtained the slug summoning, I also learned some information about the three sacred shinobi training grounds. I learned some of the secrets about them and became very interested in the mysterious Ryūchi Cave. Therefore, I want to sign a summoning contract with the great snakes of Ryūchi Cave..." Orochimaru said softly.
Orochimaru then gave Hibari a detailed account of the whole story.
After listening to his narrative, Hibari smiled and then said, "So, that guy Third Hokage recommended that you come to the Land of Hot Water to find me and have me take you to Ryūchi Cave with me?"
Orochimaru nodded, then said, "That's pretty much it."
"Ryūchi Cave...? It is indeed a troublesome matter." Hibari murmured softly. When Orochimaru heard this, his expression became a little hesitant.
But before he could say anything, Hibari smiled and said, "However, just as the Third Hokage said, I'm also very interested in this place. Your trip was not in vain, kid."
As soon as Hibari finished speaking, Orochimaru's hesitant expression immediately turned to joy, and he asked, "Hibari-aniki, are you willing to help me?"
"It's not really a matter of helping. Years ago, when I was your age, I also wanted to find a powerful summoning beast. We are both very proud people, and after hearing about a great place like Ryūchi Cave, of course I wanted to go and check it out. However, I was too busy afterward and couldn't find the time. I had to learn ninjutsu, learn knowledge, start the Mitsumine Group, and help the Anbu, so I didn't have much time to search for Ryūchi Cave. Then, not long ago, I developed a powerful summoning beast myself, so this matter has basically been dragged on indefinitely until now..." Hibari said with a hint of emotion.
After a slight pause, he continued, "However, finding Ryūchi Cave should indeed be put on my schedule. After all, the summoning beast I have and the great snakes of Ryūchi Cave can only be said to have their own advantages. Having another powerful summoning beast would also be beneficial to me. At the same time, the treasures hidden in Ryūchi Cave aren't just summoning beasts. I also have other things I seek from it..."
When he said this, Hibari looked at Orochimaru, then said again, "How about this? If you're not in a hurry, just wait for me for a few days. That guy Kakuzu went out to find people. When he gets back, I'll brief him on the subsequent matters, and then the two of us will go on a journey to find this mysterious Ryūchi Cave!"
Upon hearing Hibari's affirmative answer, a smile appeared on Orochimaru's face, and he said, "Thank you, Hibari-aniki."
Hibari reached out and patted his head, then said with a smile, "I told you, I treat you like a half-brother, so don't be so polite. Finding Ryūchi Cave isn't a matter of helping. Just think of it as a collaboration."
Orochimaru took Hibari's words as a way to comfort and care for him, but what he didn't know was that Hibari truly meant what he said.
Finding a mysterious place like Ryūchi Cave largely depended on luck. Hibari wasn't confident in his own luck, but he had high expectations for Orochimaru's luck. One should not underestimate something like destiny. If nothing unexpected happened, his success in finding Ryūchi Cave this time would likely be thanks to Orochimaru.
Hibari's plan this time was to act according to Orochimaru's ideas after they set off, plan their journey, and he would just go along with it and protect him.
If the kid who was supposed to find Ryūchi Cave actually found it again, he would also benefit, wouldn't he?
Although they would be wandering around like headless flies, it was still better than him doing it alone!
'If I find Ryūchi Cave, signing the summoning contract aside... I should also try my best to learn Senjutsu properly.' Hibari couldn't help but think to himself.
Hibari had been coveting Senjutsu for a long time. He had previously thought about asking Hashirama for advice, and he had indeed asked, but Hashirama couldn't teach him anything. He had learned his Senjutsu from the Shikkotsu Forest, and the Great Slug Sage had repeatedly and strictly ordered him not to teach it to others casually, so he couldn't break that promise.
Did you not see that his own grandfather, Tobirama, also hadn't mastered any Senjutsu? To say that he didn't have the aptitude to learn it was not true.
The Fourth Hokage, Minato, had the aptitude to learn Senjutsu, and Tobirama had the bloodline of the 'God of Shinobi' flowing through him. How could he not have the aptitude?
It was just that for various reasons, he hadn't learned it or gone looking for it.
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