Yu ignored those vague glances and took Subaru Natsuki, who had finished his warm-up activities, straight to a clean lawn.
"Master! What shall we do next!"
Subaru Natsuki looked at Yu excitedly. He was looking forward to what the master would teach him next.
Yu ignored Subaru Natsuki's excited expression, but pointed to the lawn lightly.
"Where are you sitting cross-legged now? What happens next does not require too much strenuous exercise on your part!"
"Oh! Good master!"
After saying that, Subaru Natsuki sat down cross-legged obediently and stared at Yu without blinking.
At this time, Emilia, who had just gotten up and was out for some activities, also curiously walked over with Puck, who had awakened from the elf space.
"Master Yu, what are you doing again?"
Emilia tilted his head and looked at Subaru Natsuki, who was sitting cross-legged, with a trace of confusion in his eyes.
After all, Yu's Hell-like cultivation method left a deep impression on her yesterday.
I thought it would be like this again today, but I didn't expect that when I woke up in the morning, I would find the master and the apprentice sitting quietly on the lawn.
Yu nodded towards Emilia and Puck, without explaining too much, but looked at Subaru Natsuki with a serious expression.
"The next practice is extremely important. It depends on where you can go in the future, so I want you to concentrate and not be careless!"
Subaru Natsuki, who was slightly excited when he saw Emilia coming over, immediately became focused when he heard what Yu said.
"Come on, master, I'm ready for pain!"
The corner of Yu's mouth twitched.
"Close your eyes!"
Subaru Natsuki immediately closed his eyes, and then felt a fingertip touching his forehead between his eyebrows.
"Quietly feel the fluctuations of the spirit and body. What I am going to teach you next is a cultivation method from my teacher's hometown.
It's called Chakra Refinement Method, and the production of Chakra is the combination of cellular energy and spirit, so what you have to do now is to focus your spirit on the body, feel the energy of the body, and combine it with the spirit!"
Following Yu's reminder, Subaru Natsuki followed Yu's steps and began to focus on his body.
Soon he felt a mysterious power pouring into his body from his master's fingertips.
Then, the whole body seemed to have a chemical reaction. The concentration that was originally on the physical body was constantly combined with a blood-colored energy, turning into dots of light blue light, which began to gather in his body.
This sudden change made Subaru Natsuki's heart skip a beat, and a faint excitement appeared in his heart. The state of concentration was gone in an instant, and the original chemical reaction gradually disappeared.
Yu, who was outside, frowned.
"Idiot! Don't be affected by irrelevant things. Focus on Chakra's improvement. Don't use your useless brain to think about other useless things!"
Hearing Yu's scolding, Subaru Natsuki's heart tightened, and he no longer dared to desert, but concentrated on understanding the cause of the green light spot.
Gradually watching green dots being extracted one after another in the body, Subaru Natsuki became addicted without realizing it.
The eyes of Emilia and Puck from the outside world flashed with a strange color.
As Magic envoys, they could clearly feel a trace of weird energy appearing in Subaru Natsuki's body at this time. This energy was not as gentle as Magic Mana, but rather similar to the fighting spirit of a knight, full of violence.
But it is different from Dou Qi. Although this kind of energy is violent, it is extremely easy to control. Moreover, this energy does not come from the ubiquitous Mana from the outside world like Magic and Dou Qi, but completely comes from human beings themselves.
"How is this possible!"
Puck stared at Subaru Natsuki who was sitting cross-legged in shock.
You must know that the source of all power in this world actually comes from human beings unconsciously absorbing Mana in the air. However, after tens of thousands of years of evolution, it evolved into the various cultivation methods today.
Through the creative techniques, whether it is Magic or Dou Qi, it is just a matter of absorbing external energy from an unconscious state to a conscious state, and along with the quality of the creative techniques, the speed of absorbing Mana varies.
However, what he feels now is that a power different from this world has been born. Unlike Magic and fighting spirit, he relies entirely on the energy generated by human beings themselves.
How can this not surprise and shock Puck, who is Natural Spirit.
Because this was something that had never happened in his long life, and it was completely beyond his Flame Great Spirit knowledge.
He wanted to step forward and ask how this was done.
But at this moment, looking at the focused master and apprentice, Puck suppressed the strong curiosity in his heart.
I can only quietly accompany Emilia and wait for the end of this process.
Time passed bit by bit, until the Chakra in Subaru Natsuki's body was refined to its current limit, and Yu silently withdrew the weak mana flowing into Subaru Natsuki's body from his fingers.
If Subaru Natsuki were to refine Chakra on its own, it would naturally be impossible due to the different rules of this world. However, with the help of Yu, the lord of the world, such a thing would naturally become a piece of cake.
After all, Yu is the one who has mastered Ninja World, all Kekkei Mōra and Chakra.
It's just that because these powers are usually lower than the mana he cultivates, Yu doesn't bother to use them.
As Yu withdrew his mana, Subaru Natsuki also opened his eyes.
There was a trace of exhaustion in his eyes, but it was instantly replaced by excitement.
"Master! Have you seen it! I succeeded. I can feel this power. As long as I can successfully release it, both my physical strength and speed will be strengthened several times!"
"Okay! No matter what the fuss is about, refining Chakra is just the most basic training method for ninjas. The next step is to use the method of Chakra!"
Yu scolded calmly, and instantly poured cold water on Cai Yue'ang, who gradually calmed down his mood.
"Master, how should I use this power next!"
Subaru Natsuki's eyes flickered with suppressed excitement. During this period of traveling through the different world, the most frustrating thing for him was that he had Return by Death in vain, but he had no power to change everything.
So much so that he had to use the power of an ordinary person to wander into death again and again, trying to change everything with retrospection.
But who knows the pain of death? If he hadn't had a strong heart, he might have collapsed long ago.
"If you want to control Chakra, you must first understand it. Chakra is divided into five attributes: wind, thunder, water, fire, and earth.
Everyone's physique is different, so the attributes of Chakra are also different. Now we first need to determine which attributes you have before we can determine the next method of practice."
Subaru Natsuki nodded quickly.
"Brother, how come these attributes of yours are the same as those possessed by Magic!"
At this time, Puck, who was on Emilia's shoulder, finally couldn't help his curiosity and asked.
Yu did not speak, but waved to Puck.
A trace of hesitation flashed in Puck's eyes, but because the curiosity in his heart was too strong, he couldn't hold it back in the end and flew from Emilia's shoulder to Yu's front.
Yu held him in the palm of his hand and began to masturbate uncontrollably.
After all, Uchiha is a cat slave, and he is not exempt from vulgarity, otherwise he wouldn't be raising that guy Two-Tails Matatabi. It's just that Two-Tails's handling is too bad, so now he keeps it at home.
Gently kneading Puck's cat ears and scratching its belly with his hands, Yu felt relieved. Sure enough, it was this kind of fluffy cat that made people happy to touch.
Puck was also touched by Yu's skillful hand and narrowed his eyes slightly, enjoying it for a while.
"Meow... little brother, you haven't answered my question yet!"
A slight smile appeared at the corner of Yu's lips.
"Because everything changes and never departs from its origin, any energy that returns to its original state is these most basic energies.
In other words, they are all things that have evolved from yin and yang. Tao gives birth to one, one gives birth to two, two gives birth to three, and three gives rise to all things. This is the essence of the world!"
Hearing Yu's answer, Puck's eyes flashed with shock. Although it was just a short sentence, it sounded like a loud bell in its head.
Make it seem like you saw the true meaning of the world for a moment.
"Brother... what a shocking speech! I don't know why I almost got goosebumps all over my body when I heard this!"
After saying that, Puck hugged his body tightly with Cat Claws, making a trembling and excited look.
Yu's deep eyes looked at his cute appearance, and a smile couldn't help but appear at the corner of his mouth.
"You have to work hard, otherwise you will never be able to understand the Grand Dao truth contained in this sentence!"
Puck was stunned by Yu's deep eyes. The two cute cat eyes couldn't leave Yu's eyes for a long time, as if they contained all the mysteries.
It suddenly felt that the young man in front of it was as vast as the starry sky, and for a moment it had the urge to stay with this young man forever.
But after all, it still couldn't let go of Emilia, the elf who was like a daughter, so it gradually came back to its senses.