Konoha: I am the apprentice of Captain Yamamoto!

Naruto World.

After paying a small fee, Hanyu returned.

It was still the same place he left, and at a glance, the house they lived in before was still there.

"It seems that a thousand years have not passed by in a blink of an eye." Hanyu said with a smile.

Quan also breathed a sigh of relief.

"It's okay, okay." Quan patted his chest: "I'm really afraid that I'll have to reincarnate in the dirt to meet them in the future."

"It seems that after the Gate of All Realms is officially opened, the flow rates of the worlds I have been to will probably be unified." Hanyu said.

Quan's eyes lit up and he said: "Then we don't have to calculate the time in the future! That's great!"

"Well, let's go see Naruto and the others!"

Hanyu opened the space and appeared directly in Naruto's yard.

In the yard, Hinata was wearing a pure white dress, her slightly moist long hair spread over her shoulders, with a hint of pink on her shoulders. She held a kettle in her hand, watering the flowers and plants in the yard.

Feeling someone behind her, Hinata instantly opened her eyes and saw two familiar people.

"Brother Hanyu! Sister Izumi!" Hinata turned around and faced the two of them, her face full of surprise.

"Long time no see Hinata!" Hanyu said with a smile, "Where is Naruto?"

"Naruto-kun went to Mt. Myoboku for further studies and has not been back for a week." Hinata smiled.

"Advanced studies?" Quan asked in confusion: "Did he just start learning immortality recently?"

Hinata shook her head: "No, Naruto-kun has become quite proficient in senjutsu, but he cannot always keep the natural energy in his body and let the natural energy improve his life level. Therefore, in order to solve this problem Naruto-kun wants to understand the cultivation methods of the toads and get inspiration from them to create immortal arts that only belong to humans. Naruto-kun said that when the era of universal cultivation of immortals opens, no one will be afraid of Otsutsuki anymore. Threatened."

Hanyu frowned.

"Real cultivation of senjutsu will increase lifespan in the end. If the entire planet is filled with immortality species, then the people in this world will become the next Otsutsuki! Didn't Naruto consider this?"

Hinata was stunned, shook her head slightly and said: "This... I'm not very sure. Naruto-kun hasn't said anything about this, but I think he will be able to solve it!"

Hinata has always had great confidence in Naruto and feels that as long as Naruto takes action, there is nothing that cannot be solved.

In fact, Naruto was almost bored to death in Miaomu Mountain at this time.

"Damn it! What should I do? Brother Hanyu! Come back and teach me!"

At this time, there was an orange-red vortex mark on Naruto's forehead and between his eyebrows. This was a fairy technique developed by Naruto that was suitable for humans. It could not only enhance human strength, but also greatly increase life span.

Combined with the trace of the Six Paths power that Hanyu gave him, Naruto's current configuration is no different from that of him who fought in the Valley of the End in the original work. It's just that the natural energy in his body is different. As long as he is given time, he can do it. To get to that point, and it’s not a one-time thing.

What Naruto is worried about now is also the problem that natural energy will increase human lifespan.

This is not a small problem, but a rather troublesome matter.

How fast do humans reproduce?

It only took less than 1 years to go from more than 15 million people when Hanyu first unified the world to 30 billion people now.

This is also the result of family planning, where each family can only have two children.

If we really liberalize the economy, it will not be a dream to have a population of over 30 billion in [-] years.

After all, the planet has been unified, and the supernatural power of the ninjas can greatly increase the survival rate of babies.

Basically, as long as they are not stillborn, they can survive to adulthood.

It is still unknown where the limit of human life span is, but it seems that it will not be less than 80 years old.

In other words, in the next few years, the world's population will continue to rise.

Once Naruto announced this magical technique that could increase lifespan, he simply couldn't imagine what the world would look like a hundred years from now.

"Damn it!

"Naruto grabbed his hair and yelled filial piety.

Beside Naruto, the two immortals Fukasaku and Shima were a little at a loss.

"Why is little Naruto so troubled? His magic is obviously very successful?"

Next to the two immortals stood Zuosuke.

As Naruto's good friend, it was natural that Zuosuke knew what Naruto did.

Of course, Shikamaru and Choji were also there.

Ya is not here, he has no interest in these things, Ya prefers to practice Ya Tong Ya.

Shikamaru sat on the ground. Smart people always think more. From the moment Naruto completed this magical technique, Shikamaru knew that this thing could only be destroyed!

Unless there are no more newborns in the ninja world in the next few hundred years, this senjutsu will be of no benefit to the world.

Shikamaru made a decisive decision: "Destroy this thing immediately, don't leave any backup!"

Choji didn't know why, but still chose to support Shikamaru.

Spew out a ball of flame, destroying all the information in front of them.

All the ashes were given to Yang!

After doing this, Naruto breathed a sigh of relief, but it was impossible to abandon the magic in him.

Once refined, it can be used permanently.

"It seems that you have come up with something very interesting." Yuyu's voice sounded from behind everyone. Looking at the mark between Naruto's eyebrows, Yuyu was also greatly surprised.

"Brother Hanyu!" Naruto saw the savior and immediately rushed to Hanyu, pleading: "Brother! Help me get rid of the natural energy in my body! Otherwise, I may live for more than 1000 years and still not be killed!"

That's right, Naruto's own vitality is very powerful. Coupled with Hanyu's subsequent transformation, his vitality surpassed Hashirama. Now he has developed a magical technique that can rapidly increase his vitality. It is difficult for Naruto to die even if he wants to. !

Hanyu shook his head: "There's nothing I can do about you. I've already merged with you perfectly. Even my children's skills can't separate you."

"Why is this like this!" Naruto burst into tears, feeling that his future was dark.

Think about it, in a few decades, Hinata will become an old lady, but Naruto will still look like a man in his twenties. When Boruto dies of old age, Naruto will still look like a 20-year-old. When Boruto dies of old age, he will still look like a 20-year-old. Even though he is old, Naruto still looks like he is [-] years old...

These things made Naruto shudder just thinking about them.

"Living alone like this may be more uncomfortable than dying." Zuosuke said with a gloating smile.

As a bad friend, he would naturally laugh mercilessly at this time.

Speaking of which, it was just immortality, and it was not a big deal. Zuosuke smiled without any psychological pressure.

"Okay, I used to think that someone would come up with this trick of cultivating immortals, but I didn't expect that it would be you who would do it, and so quickly."

It is only a matter of time before the geniuses of the whole people come up with a more advanced training system. For example, Orochimaru, despite his silence day by day, has actually completed a series of experiments, whether it is advanced magic or the power of six paths. , Orochimaru has already achieved something.

However, he still cannot understand the nature of the power of six paths. If he gets some power of six paths, with Orochimaru's ability, it will not be a problem to create the Samsara Eye.

Here, Naruto was a little confused.

"Brother, have you had any plans before?"

Hanyu nodded: "I knew from the beginning that senjutsu was not a secret thing. Any jounin with some ability knew about it. However, for people in the past, practicing senjutsu was too dangerous. If you are not careful, you will die. However, for people nowadays, natural energy is actually not dangerous. As long as you are willing to work hard, you will definitely succeed in cultivation. Therefore, I have thought about it a long time ago, whether to Popularize immortality, and whether we should popularize transformed immortality."

"Improved senjutsu?" Naruto and the others concentrated for a moment, listening carefully to Hanyu's words.

"That's right, the natural energy that can stay in the human body forever is what I said before about cultivating immortals." Hanyu nodded.

Naturally, he wasn't really just sitting around in those years. With the magical skill of shadow clone, Hanyu could handle many things with his colleagues.

Immortal magic is also one of them.

He studied the senjutsu on Jiraiya, Jugo, and Slug respectively.

Based on this, he developed his own magic.

Unfortunately, for Hanyu at that time, the improvement in senjutsu had been minimal, and the only effect was probably to make him stronger endurance and physical strength.

Other than that, there's nothing else.

So Hanyu didn't make any show of it.

But I didn't expect that Naruto would actually research such a terrifying thing today. It can not only greatly improve his strength, but also enhance his resilience. It really raises his life level!

puff!

Climbing the stairs directly penetrated Naruto.

Naturally, Hanyu wanted to keep a copy of such a good thing.

Naruto was a little confused, and Hanyu didn't explain. He just took out the weapon and climbed up the stairs, then carefully observed the wounds on Naruto's body.

In the past, Naruto's injuries would have been fatal. However, according to Hanyu's observation, the natural energy in Naruto's body stopped the bleeding almost instantly, and rapidly divided the cells, allowing Wound recovery.

This was a situation where Naruto had almost no control. If he had consciously concentrated his chakra, this injury would have healed almost instantly.

This is not the kind of cell division that consumes lifespan like Bai Hao's art. It is simply using the energy of nature to repair one's own wounds, with almost no consumption of one's own vitality.

But it hurts for sure.

Naruto was now gasping for air with his teeth cracked, and it was very funny that he dared to be angry but dared not speak.

After Naruto's wounds were completely healed, Hanyu said: "If this kind of magic spreads, I'm afraid not only will human beings be in chaos, but even the various Otsutsuki in the universe will be competing to come to Earth, and they will be You practiced the elixir, and finally took away this cultivation method and raised gu on various planets."

Naruto's face turned pale, and he said sluggishly: "Then didn't I do something very stupid?"

"Yes, very stupid." Hanyu nodded and said without mercy: "Even I didn't expect that you would come up with such an outrageous thing. I even doubt that you did it at all."

Hanyu's eyes changed into samsara eyes, with a layer of chakra attached to his hands, and he grabbed at Naruto.

As expected, the Immortal of Six Paths was captured by him.

"Did you do it?" Hanyu asked with interrogation.

He could only think of the Sage of Six Paths who could come up with such a heaven-defying thing in the entire ninja world.

Coupled with the fact that the clone of the Sage of Six Paths suddenly appeared when he went to fuck Kaguya, he has enough reason to suspect that the Sage of Six Paths is the final boss of this world!

At this time, the Six Paths Sage who was dragged out by Hanyu was still a little confused.I didn't expect that I could be pulled out directly.

However, as a person who has been dormant in Naruto Zuosuke's body for a long time, the Sage of Six Paths said decisively:

"Ahem, um, this matter has nothing to do with me, it has nothing to do with me!"

"It doesn't matter if you say it's irrelevant?" Hanyu obviously didn't believe what the Sage of Six Paths said. "With Naruto's brain, how could he develop such a terrifying magic technique? It only took a few years. Even Orochimaru was using it. It took countless Bai Jue lives to develop a technique that was several levels lower than this."

The Sage of Six Paths stroked his beard and said calmly: "Although your reasoning is very reasonable, the fact is that this thing was really researched by Naruto."

Hanyu remained silent, staring at the red mark on the head of the Six Paths Sage.

The Six Paths Sage also discovered this problem and said with a smile: "This is a seal to prevent me from opening the Nine Magatama Reincarnation Sharingan."

"...I believe what you said for the time being." Hanyu stopped pursuing the Six Paths Sage's responsibility and said: "The most important thing now is the issue of whether to keep this technique or not.

I think you all already know that once this level of magic is leaked, it will not only attract countless Otsutsuki clan to harvest, but will also cause the problem of insufficient resources in human society. Finally, humans must take the initiative to mine other planets. Once we get into contact with the kind of cosmic life that has lived for tens of millions of years, what awaits us is still the path of destruction! "

From previous conversations with Naruto, Hanyu already knew that he would probably be trapped in a certain world for several years in the future. At that time, Naruto should have been stimulated by Otsutsuki, so he went to explore new resources in the universe.

This made Hanyu hesitate. Should he leave some backup, such as a higher-end clone?

"No, no! Now that we have let go, we should not restrain them anymore (?>?

Thinking of this, Yuyu instantly felt a lot more enlightened.

The road has been pointed out. If you still play to death in the end, then you deserve your fate and no one can save you.

"Isn't that very dangerous?" Naruto worriedly said: "It is now known that in more than ten years, people from the Otsutsuki clan will come to our world. Although they are not very strong, there will be the strongest ones. How on earth are we going to cope at that time!"

"Don't worry, there will definitely be a solution when the time comes." Zuosuke comforted.

When Hanyu turned around again, the Sage of Six Paths had already run away, probably returning to the Asura chakra in Naruto's soul.

Looking at a few people, Hanyu asked: "Have you ever considered adding something to the new celestial arts that would allow those who practice celestial arts to exert greater power, but at the expense of most of their vitality?"

Hearing this, several people were silent.

But in Naruto's spiritual world, a big fox pricked up his ears!