I just returned to Konoha and found that all my clan members were gone.

After completing the mission, Ye Lan and others returned to Konoha. That day, Ye Lan came to the Nanga Shrine that Sasuke mentioned. This is a secret place known only to the Uchiha clan. He came to the stone tablet that Sasuke mentioned. There were some complicated patterns engraved on it. When Ye Lan opened his Sharingan, he could understand what was recorded on it.

The stone tablet first introduced the ancestors of the Uchiha and Senju clans, Indra and Ashura, and their father, the Six Paths Sage. It looked a bit like a myth. Then it wrote how the Uchiha could open the Sharingan. When Ye Lan read one-third of it, he couldn't understand the rest. At this time, the three magatama in Ye Lan's eyes slowly turned and then turned into a Mangekyo. The power on the stone tablet could indeed be seen more clearly. It showed that the Mangekyo was not the ultimate power of the Uchiha clan, and the Mangekyo could evolve again.

After opening the kaleidoscope, if you transplant the kaleidoscope of a close relative into your own eyes, the kaleidoscope will become an eternal kaleidoscope that will never go out, and your pupil power will be greatly enhanced.

Seeing this, Ye Lan was not too surprised. Sure enough, this Mangekyo with side effects was not the end of the Uchiha clan. However, to find the Mangekyo of a close relative, the only way was to transplant Shisui's eyes. Shisui was already dead, and it was very likely that Shisui's eyes were in Itachi's body. This was not only the legacy left by his brother, but also the key to Ye Lan's evolution into the Eternal Eye. However, it was not so easy to get Itachi to hand it over.

Moreover, even if the contents on the kaleidoscope tablet were opened, only two-thirds of the capacity could be seen. If one wanted to know the following contents, only the Eternal Kaleidoscope could be seen. Ye Lan watched the contents several times before leaving the shrine.

Ye Lan was somewhat skeptical about the contents on the stone tablet. He was not skeptical about the methods of opening the Sharingan, as these methods were most likely true. He just wondered how such a thing could have been left behind. Could it be that Indra really left it behind as mentioned above? If Indra really existed, was the Six Paths Sage also real? Was there really such a thing as a god in this world? This was the first time Ye Lan felt unfamiliar with this world. As a person who had received nine years of education, thinking had become an instinct. Without certain facts, everything was worthy of doubt.

Coming to an open space, which was far away from the village, Ye Lan didn't care about anything and directly summoned Po Jun. After a puff of smoke, Po Jun's huge body appeared in front of him.

"Boy Ye Lan, what's the matter again?" After Po Jun was summoned by the spirit, he found that there were no enemies and didn't know why Ye Lan called him.

"Pojun, please teach me how to use natural abilities. My progress in practicing natural energy is too slow." Let's not consider the matter of the Eternal Eye for the time being. If he wants to solve the problem of declining pupil power, learning natural energy can also alleviate it. It's just that Ye Lan's practice has not yet started, so this time he wants to ask Pojun for advice.

"Boy, you are finally on the right path. Okay, sense the natural energy first and let me see." Po Jun didn't expect that Ye Lan would come to him for this kind of thing, and nodded with satisfaction.

Ye Lan then closed his eyes and sat cross-legged, sensing the natural energy in the air and trying to absorb all of it into his body. However, after a while, Ye Lan was hit on the head by Po Jun. He looked at Po Jun with some confusion.

"Young man Ye Lan, what you are doing is wrong." Po Jun's bird face actually made a serious expression, "Although the natural energy contained here is very small and it is not easy to cause your practice to go out of control, you can't do it like this."

Ye Lan stopped practicing and looked at Po Jun.

"Natural energy cannot be used directly and roughly like the chakra in your body. Natural energy is more like a conscious existence. You must learn to adapt to natural energy instead of controlling it. Natural energy represents everything in the world. All living things in the world actually have natural energy, just more or less. It represents a natural law. Do you think you can control the natural law?" Po Jun explained.

Ye Lan shook his head. He didn’t expect natural energy to be this kind of thing. He had never talked with Po Jun before. This was the first time he knew that natural energy was such a force, like some kind of will.

“You have to learn to obey it and let the natural energy approach you actively, so that it will not hurt you but help you.”

After listening to Pojun's explanation, Ye Lan sensed again. He no longer absorbed the natural energy in the air roughly. Instead, he observed the natural energies, the grass and trees in the air, the rabbits foraging not far away, the fish blowing bubbles in the river... Every life has a trace of natural energy. When Ye Lan sensed them, they seemed to have discovered Ye Lan and involuntarily approached Ye Lan.

Pojun nodded when he saw Ye Lan's condition. It seemed that he had already got the hang of it.

Ye Lan opened his eyes again, observed his body and found that some hidden injuries on his body were slowly being repaired by natural energy. His eyes, which had become a little nearsighted due to the kaleidoscope, also got better. He clenched his fists and found that his strength had also increased.

"You do have some talent. After all, you learned it through learning. Now you have gotten started. However, there is too little natural energy here, so it can't provide much improvement to your body. It can only help repair your body." Po Jun said.

Feeling the changes brought about by natural energy, Ye Lan was somewhat delighted. The improvement brought about by just entering the natural energy was so great. Although his combat power was not greatly improved, it could repair the side effects brought about by his kaleidoscope.

"Don't overuse your eyes. If you use too much, your current level of natural energy will not be able to repair them." Po Jun saw Ye Lan's thoughts and reminded him.

Slowly, the natural energy in Ye Lan's body was consumed. He couldn't help but look at Po Jun and said, "Although natural energy is difficult to learn, the power it enhances is much stronger than chakra. Why isn't there anyone who specializes in practicing natural energy?"

Po Jun was silent for a while and said, "The cultivation of natural energy focuses more on talent, and there is a risk of losing control without guidance. Unlike chakra, even ordinary people can master it after a period of training."

"The practice of natural energy is more like a kind of inheritance. A long time ago, there were some people with natural energy. They all called themselves immortals. Because of chakra, there are very few of them now. I haven't seen one since I was born. You kid may become the first immortal I have ever seen." Pojun explained.

After hearing Po Jun's words, Ye Lan seemed to have discovered something and couldn't help but ask: "Is it because of chakra? Was there no chakra before?"

Ninjas appeared because of chakra. If, as Pojun said, the sudden appearance of chakra allowed the ninja profession to flourish, then how did chakra appear?

"According to our ancestors, chakra suddenly appeared thousands of years ago. At that time, there were only a few immortals, and most of them were ordinary people. There were not many powerful people, but chakra spread very quickly, resulting in few people being able to practice the difficult natural energy. Some people who had already learned natural energy also began to learn how to use chakra, and the practice of natural energy was gradually cut off. Our clan had to move its land and lived in seclusion on a small island."

That’s right, if Ye Lan hadn’t accidentally come to this island, the Thunder Falcon clan would never have appeared in front of the world, and this kind of practice would probably have been slowly abandoned. Even the current Pojun doesn’t just practice natural energy, it also practices some chakra abilities.

"If what you said is true, Pojun, then chakra belongs to an outsider, and natural energy is our original power..." Ye Lan felt as if he had discovered some big secret. He somewhat believed that the Six Paths Sage, Indra and Ashura did exist in real life, but he was not sure what roles they played and what happened in between. Too many questions aroused Ye Lan's curiosity.

"What's the use of thinking so much, kid? I was curious before, but now I don't think about it anymore. I think our clan lives pretty well on that island. I signed a contract with you just to see more of the outside world. I never care whether others practice chakra or natural energy. If you think too much, you will only make yourself tired." Po Jun smiled when he saw Ye Lan struggling in thought.

"But I heard from my father that there should still be some summoning beasts in the ninja world that practice natural energy and have not completely secluded themselves. They still come into contact with some ninjas. You may also encounter ninjas who practice natural energy in the future." Po Jun added.

Ye Lan has not met a ninja who practices natural energy yet, but this kind of thing would probably not be used unless it was a life-and-death situation. Moreover, it is difficult to practice. Just sensing the energy takes a lot of time. If you want to use it in battle, you cannot do it without a long period of practice. Maybe I will meet such a person in the future.