I smiled and said, "Thank you, Jiuwei...com." Jiuwei snorted and then there was no sound. I lay quietly on Jiuwei's abdomen. Maybe no one could have thought that Jiuwei and I would get along so well!

"Hey, little kid, have you done something in the past few days? If it is normal, your mental power should not have broken through so quickly. Unless you have experienced something special recently?" Jiu Tai said softly.

"It's nothing? I just fought a fight with a Shangren today." I said as if nothing happened: "Of course, it's not me alone. I have three people on my side, one of them is Shangren. He is the main force. But although I am just an auxiliary, and it's just a water clone of the other party. But even this has already shocked me. I never thought that Shangren's strength is so strong, although they are already elite Shangren. But the gap between me and them is too big. Unless you borrow your power, I will not even have the ability to resist at all."

"Is that?" Jiuwei paused and said, "Okay, little kid, go back quickly! Your mental power is about to break through. If you don't go back, it will be too late. By the way, after your mental power breaks through, your mental power will increase greatly, and you can control the power of my four tails without losing your mind. But if you can not use it, don't use it, after all, my power is not equal to your power. Only when your own strength becomes stronger can you cope with all the difficulties in the future."

"Can you use the Four Tails?" I nodded and said, "I understand. You are my last trump card, and basically I will not borrow your power." I got up from Jiu Tai's body and then walked out.

"Be careful, little kid, the breakthrough of mental power is the most dangerous." The voice of Jiu Tai came from behind me: "If you can't break through this time, then forget it first! Otherwise, if you fail by force and fail, you will become a fool. It's better to give up this breakthrough and slowly increase the security of this."

I smiled plainly and said, "Don't worry, I've been no ordinary little guy from the beginning, right? I will definitely make a breakthrough successfully. As long as I can make a successful breakthrough, my mental power will double. If I slowly increase my mental power, it may take several years to reach this level. This speed is really too slow, and I don't have so much time to wait."

Jiuwei was slightly stunned. He looked at my back without saying anything, but a strange look appeared in his eyes. But soon he closed his eyes and lay down again, and my figure had disappeared...

After I left the depths of my heart, just as I was about to open my eyes, a sudden burst of severe pain came from my brain. I quickly calmed down my mind and endured the severe pain, immersed my mind in practicing chakra. Although the severe pain became more and more intense and had reached a point that ordinary people could no longer bear, I could still persist for me. Here I have to thank the villagers of Konoha Village. If it weren't for their abuse of me when they were young, I wouldn't have such strong perseverance to persevere now.

Just when my mental power broke through, Sakura noticed my strangeness. I saw my whole body trembling slightly, and sweating continued to appear, and my whole body was wet with sweat. It seemed as if it was completely fished out of the water. There was also a hint of pain on my face.

"Naruto, what's wrong with you?" Sakura hurriedly asked as she looked at the sweat that kept coming out of my forehead, but all my energy was now in the severe pain of the fighter, and she ignored her at all. Sakura immediately panicked when she looked at me. She shouted a few hurriedly, but I still didn't respond to him.

At this time, Sasuke was alarmed by the side. After opening his eyes, he knew that my situation was not good when he saw me, but he himself didn't know what to do with my situation. After thinking for a while, he asked Sakura to help Kakashi over. After all, only Kakashi, who is a sushin, might know about this situation.

Kakashi was helped by Sakura to the room, revealing her eyes and feeling sleepy, and she didn't even wear a ninja jacket. She didn't even wear a forehead protection, and a Sharingan with a knife mark was just slightly closed. In fact, Kakashi was woken up by Sakura after just under ten minutes of sleep. She only rushed over after hearing about my situation.

Kakashi took a look at my situation and knew what I was like. He sighed faintly and said, "Naruto's mental power is breaking through."

"Mental power?" Sasuke was slightly stunned and confused.

Kakashi nodded and said, "Okay, I'm talking about the power of ninjas to you at this time, chakra is OK. Sakura, let's explain chakra."

Sakura nodded, looked at me who was trembling all over and said, "Chakra is simply the necessary energy of using ninjutsu. There are two ways to obtain this energy; one is the energy extracted from human cells; the other is the spiritual energy trained through many cultivations and accumulated experience." Then Sakura paused, "Then Mr. Kakashi, is Naruto breaking through his own mental power?"

Kakashi nodded and said, "Ah, yes, you have already said that the two powers of ninjas, but you don't know that most ninjas' chakra are extracted from the cells of the body. As for the spiritual power, although all ninjas are trying hard to train themselves, few people can extract a large amount of chakra."

Then Kakashi paused and said, "Actually, when ninjas practice, they will always encounter some peaks. If they cannot break through this peak, they may not be able to become stronger in their lifetime. We call this bottleneck, which means that a bottle is already filled with water. If the bottle cannot become larger, then they cannot continue to fill water. Just like some people, they will never be able to break through to become a top ninja in becoming a Zhongnin. This is because they have not broken through their own bottleneck. But if they can break through this peak, their strength will increase to a great extent."

Sakura nodded and then wondered: "It's like Naruto's situation? But I don't seem to have heard of anyone like Naruto when he breaks through?"

Kakashi shook his head and said, "Because the celebrity breaks through the spiritual power this time, which means that Naruto has done what very few people can do, extracting a large amount of chakra from the spiritual power."

Sakura was slightly stunned, then said happily: "Then, wouldn't Naruto be very powerful?"

Kakashi sat down and leaned against the pillar and said, "Ah, as long as he can successfully break through, Naruto's chakra will at least double, and his control ability on chakra will be greatly increased. In this way, it will be easier for Naruto to perform ninjutsu, and because his mental power is improved, his resistance to illusion will also increase. Even physical skills, as long as Naruto exercises a little, physical skills will also increase. It can be said that the breakthrough of mental power is a comprehensive breakthrough for a ninja."

Sasuke gritted his teeth slightly, looking at my eyes full of reluctance, so Sasuke quickly spoke, "Teacher Kakashi, do you know how to exercise your mental power?"

Kakashi looked at Sasuke and said, "Yes, do a lot of exercise." Kakashi said, "Sasuke, I know you hope to catch up with Naruto, but I want to tell you here that it is definitely not a coincidence that Naruto will have a breakthrough today. Although I don't know what kind of exercise Naruto has undergone before? But I can roughly guess why Naruto broke through his mental power today. I think Naruto must have experienced a lot of exercise before, which has made his mental power saturated. In other words, Naruto has already reached a bottleneck, but because of his lack of practical experience, he has been unable to break through his bottleneck. But today after the battle with Zaibuzhan, Naruto's strength began to gradually become stronger as the battle time passes. Although he still used the 'Flying Thunder God Art', I found that Naruto's strength has increased a lot, so Naruto will have such sudden breakthroughs in mental power."

"Teacher, please help me with training!" Sasuke looked at Kakashi eagerly.

Kakashi shook his head and said, "Sasuke is useless. Even if you train, you can only extract chakra from your body cells as soon as possible, and you cannot make a mental breakthrough like Naruto."

"What? Why? Teacher!" Sasuke asked in disbelief.

Kakashi sighed slightly and said, "Because it takes too much time to practice mental power, and every time he breaks through, he will suffer great pain. The most important thing is that the practice of mental power is much slower than refining chakra from the body cells. Only by breaking through his original mental power like Naruto, can he be huge chakra. However, no one in the top ten people cannot break through their bottlenecks and stay in place forever. Some people fail when they break through their bottlenecks and eventually become dumbfounded. Only a small number of people have broken through the bottlenecks. But there is no such person."

Sakura was stunned and looked at me and said, "Then teacher, do you think Naruto will...?"

Kakashi shook his head and said, "I don't know, there is no doubt about the danger of breaking through mental power. As for whether Naruto can break through, it can only depend on Naruto himself. None of us can help him, but the only thing is certain is that if Naruto can break through successfully, Naruto's strength will be no less than me."

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Chapter completed!