As more and more natural energy is integrated into the body, Echizen Kazuya also clearly feels the changes in himself, not only the amount of chakra has increased significantly due to the addition of natural energy, but also the body strength and cell activity are also constantly getting stronger.

Because it was the first time he absorbed natural energy, although he was able to control this new energy with perfect chakra control, Echizen Kazuya still did not indulge in the growth of power, and soon resealed the active substance, and the trend of natural energy convergence stopped.

After Echizen Kazuya stopped absorbing natural energy, he began to observe the changes in his body after absorbing natural energy, and after carefully examining his whole body, he found that his body was not damaged except for a mark on his forehead that resembled a flame, and that the mark on his forehead disappeared after the natural energy was exhausted.

Echizen Kazuya was relieved to finally determine that natural energy did not have any harmful effects on his body at all, which meant that he could use the natural energy scattered throughout the space with confidence in the future, which could solve some of his own chakra deficiencies.

After completely confirming that natural energy is harmless, Echizen Kazuya couldn't wait to continue studying the effects of natural energy, and then found that it not only greatly increased his chakra volume, but also improved his recovery ability, speed, and strength at the same time.

What's even more terrifying is that even the ninjutsu used with the chakra fused with natural energy is much more powerful than the original chakra, and the chakra seems to have become a higher energy after being fused with natural energy.

With these discoveries, Echizen Kazuya was naturally overjoyed, and his strength was multiplied because of this, but now the only problem is that Echizen Kazuya still has too little mysterious substance in his hands, and the convergence speed of natural energy is not satisfactory, and it will take a long time to prepare for it if it wants to play a role in actual combat.

Because the mysterious substance is derived from the spell mark of the Great Snake Pill, Echizen Kazuya of course thought that there must be such a substance in the Great Snake Pill, and the next question is how to get it.

On the other hand, Echizen Kazuya did not fully hope to obtain this substance from Orochimaru, and he began to study the principle of this substance to attract natural energy on his own, trying to find a way to attract natural energy fundamentally.

And when treating Sasuke, Echizen Kazuya found that the active substances in his body were increasing after the spell mark broke out, which shows that the active substances can multiply on their own, and as long as they find a way, they will definitely be able to get more active substances.

Echizen Kazuya, who didn't know much about the plot, didn't know at this time that what he had discovered was the use of the immortal mode, and naturally he didn't know that he could learn how to absorb natural energy in places such as Myoki Mountain and Snake Cave, so he could only explore on his own wholeheartedly.

Echizen Kazuya also has the idea of directly incorporating the active substance into the body to try, with his medical ninjutsu and the ability to control his body, it will not be possible to incorporate the active substance into the body, even if there are side effects, the active substance can be extracted from the body in time, but Echizen Kazuya is still prepared to wait for a while, first study this substance and make some preparations to deal with emergencies.

Echizen Kazu, who had practiced all night, didn't feel tired at all, but looked energetic, and appeared in Xiao Li's ward with a spring breeze.

"Xiao Li woke up, how does he feel about his body?" Because he found a way to quickly strengthen his strength and solved some problems with the amount of chakra, Echizen Kazuya, whose strength could be greatly improved, was in a good mood, and asked with joy in his tone.

"Hello, Mr. Kazuya, thank you for helping me with the treatment yesterday, I feel very good, but my body is still not strong!" Xiao Li, who was still covered like a mummy, said gratefully, and reluctantly raised his hand to prove what he said.

"What you need now is to have a good rest, and don't force your energy until you are fully recovered, I know that you are desperate to resume your cultivation, but you can't do it quickly, and practicing early before you are fully recovered is harmful and even life-threatening. I promise, in just a month, you'll be as alive as before, so bear with me for now! Kazuya Echizen said with a smile.

"Yes, Kazuya-sensei! Teacher Kai reminded me yesterday that I won't mess around! Xiao Li solemnly agreed.

"Okay, I'll check it out for you, and then I'll take out the bone fragments in your spine depending on the situation!" Kazuya Echizen said confidently.

"Yes, please, Kazuya-sensei!" Xiao Li said respectfully.

The operation to remove the fragments in the spine is very troublesome, especially the chakra control and perception ability is extremely strict, even with the perception of the heart and eye, Echizen Kazuya is also fully absorbed during the operation, and does not dare to relax at all, in this case, of course, the speed of the operation is not fast.

Under the fiery gaze of many ninja hospital doctors who came to observe and study, it took Echizen Kazuya a full morning to remove three easily removed fragments from Xiao Li's spine without causing any damage to his nerves.

"Awesome, really amazing, today is an eye-opener!" After watching Echizen Kazuya's surgery throughout the whole process, Doi Rikuhei sighed excitedly after Echizen Kazuya successfully removed three fragments.

"Kazuya's medical ninjutsu shouldn't be under Princess Tsunade, it's really powerful!" Mihashi Nari, the director of the Ninja Hospital, said with relief that Echizen Kazuya was still full of doubts when he went to study at the Ninja Hospital at the recommendation of Sarutobi Hiza, but he didn't expect that Echizen Kazuya would grow to this point in a blink of an eye.

"The dean's reputation is overrated!" Kazuya Echizen took the towel handed by the nurse and wiped his sweat, and said with a smile.

"There's hope for this kid, I thought he wouldn't be able to continue his ninja career!" Tajima sighed.

"Kazuya-sama really deserves the title of a little miracle doctor, and his medical skills are indeed excellent!"

"Hahaha, it's not appropriate to call the little doctor in the future, just call the doctor directly!" Lu Ping laughed heartily, Xiao Li's injury can be cured, as the attending doctor, of course he is the happiest, no doctor wants to see his patient can't be cured.

"Okay, okay, let's go out first, let this kid have a good rest, Kazuya is also tired, let's stop here today!" Mihashi interrupted the excited and inexplicable crowd and said with a smile.

Akai, who was anxiously guarding outside, knew that the operation should have been successful when he saw the medical ninjas coming out with smiles on their faces, but he still couldn't hold back his impatience and rushed to Echizen Kazuya, wanting to get an affirmative answer from Echizen Kazuya.

"Senior Kai, this operation was very successful, that's all for today, I'll come back tomorrow!" Echizen Kazuya knew what Akai was anxious about, and said bluntly.

"Thank you, thank you, Kazuya!" Hearing this, Akai excitedly grabbed Echizen Kazuya's hand.

After completing Xiao Li's treatment, Echizen Kazuya was busy doing special training for Ino and others, and the time arrangement was slow, and the special Kunai of the Flying Thunder God Technique handed over to Moonlight Blast was not used in the end, and after Echizen Kazuya's reminder, Moonlight Blast did not follow very closely, and it has been hanging far behind Yakushidou, even with Yakushidou's ability, he did not find the existence of Moonlight Blizzard.

After seeing Yakushidou and Markey of Sand Ninja Village secretly meet, Moonlight Blaster did not go forward to investigate, but immediately returned to Konoha on the right foot.

"Hokage-sama, that's the way it is, Yakushidou met with Maki from Sand Ninja Village after leaving Konoha!" Moonlight Blizzle reported calmly.