Uchiha Ayumi's three severed limbs had been treated on the front line. At the time, after only simple debridement, he received healing technique treatment, directly sealing the wounds.
Because even the broken bone stumps had not been properly cleaned, the wounds healed terribly. But at least his life was saved.
By the time he was sent back to Konoha for better treatment, the three wounds had already gone through several rounds of inflammation and pus, bone resorption, wild bone spurs, granulation growth, cysts, abscesses, and countless other minor problems. The wounds were completely ruined, leaving the healed stumps uneven and pitted.
Because the lesions had developed too severely, he had even lost the chance for proper amputation, as well as the possibility of installing prosthetics. Helplessly, he had become a complete cripple.
Uchiha Yoru used the scalpel to cut open the long-healed wound. The moment he lifted the skin, he saw the chaotic structure beneath it.
Proliferated fascia, bone spurs, blood vessels, and connective tissue were all tangled together in disorder. There were even nerves twisted randomly through them.
Even calling it a tangled mess was not enough.
Uchiha Yoru took a deep breath and began handling it. Bit by bit, he sorted out the mess at the fastest speed.
Cutting through a tangled knot with a sharp blade was never suitable for treatment, unless it was to save a life and diseased tissue had to be removed.
Uchiha Yoru had sharp eyes and steady hands, along with powerful natural healing ability. Borrowing the vitality of the flesh itself, he quickly untangled the mess.
He removed the overgrown blood vessels and nerves, then connected them to the missing positions. Only the completely missing parts were generated with targeted natural energy.
When the work ended, transparent nerves, red arteries, and blue veins were held up in midair by invisible natural energy, clearly outlining the shape of an arm.
Blood had even begun flowing and circulating through the vessels, revealing an eerie, vibrant vitality.
Satisfied, Uchiha Yoru began the next step.
He activated Wood Release chakra, gently tapped the cleaned fracture surface with his index finger, then drew it toward the distal end.
Amid faint creaking sounds, wooden bone grew out from the fracture and slowly extended in the direction of the fingers as his finger moved.
After half a humerus formed, Uchiha Yoru guided it with both his index and middle fingers. The Wood Release growth split into the ulna and radius, extending forward at the same time.
At the wrist, Yoru had to use all five fingers to control the Wood Release and form the carpal bones, metacarpals, and phalanges one by one.
In Chinese history, there were legends of willow branches being used to replace finger bones. Uchiha Yoru had already verified that this was feasible, but only as a temporary method.
His Wood Release was different.
Not only could it serve as temporary support, but under the operation of life, it could accept calcium replacement and quickly become true bone.
The experimental dog's bones had changed in exactly this way, slowly replacing wood with bone until there was no flaw at all.
After the Wood Release skeleton finished growing, Uchiha Yoru kneaded together the fascia and connective tissue he had cut off earlier and covered every joint with them.
Using these pieces of flesh as seeds, Uchiha Yoru activated his technique.
Wood Release: Limb Regeneration Technique.
Along with faint chirping sounds, the cushioning material between the bones fused together and began growing outward according to Uchiha Yoru's understanding of the human body's structure.
As the white fascia extended, it gradually transformed into red muscle fibers. Thousands of muscle fibers were like earthworms, probing forward until they touched the muscles on the opposite side, then fused together as if glued.
The slender muscle fibers began swelling and contracting, gradually becoming thicker. They also went from a relaxed state to a tense state, looking strong and powerful.
Finally, Uchiha Yoru wrapped both hands around the newly born arm with its exposed crimson muscles and slowly moved from the stump toward the tip.
As his hands moved, Wood Release chakra gathered at the skin incision cut open by the scalpel.
Tiny plants, too small to be seen by the naked eye, grew from the incision's surface. They rapidly multiplied, expanded in volume, and swiftly transformed into human skin.
Supported by Wood Release chakra, the plants reproduced so quickly that they fully kept up with Uchiha Yoru's speed. In just two minutes, they closed at the gaps between the five fingers.
Only then did Uchiha Yoru exhale deeply, relaxing his tense mind.
The human body was far more complex than a dog's, and also much larger. The workload could not be compared at all.
The Limb Regeneration Technique used Wood Release cells, reversing the trait that made those cells transform into trees. It reversed rapidly growing plant cells into Wood Release cells, then finally transformed them into human cells.
Because the entire process developed in reverse and completely violated Wood Release's natural characteristics, the caster had to maintain tight control throughout the whole process without the slightest relaxation.
Even though Uchiha Yoru had bypassed the most difficult bone growth and separated the growth of blood vessels and nerves, the entire regeneration process was still a heavy burden for him.
But it was still within what he could endure. He would not feel tired just from regenerating one arm.
After resting for a few minutes and easing his tense mind, Uchiha Yoru performed limb regeneration on Uchiha Ayumi's legs as well.
By the time Miwa Masayo woke up and came over with Yaeko and Uchiha Shisui, Uchiha Ayumi was already standing on the ground with tears streaming down his face.
Although Shisui had already been numbed by countless shocks and surprises, seeing Ayumi stand on the ground with his own legs still left him dumbfounded and speechless for a moment.
But he had been tempered by many shocks, so he quickly recovered from his daze.
Seeing that Uchiha Ayumi's balance was unstable, Shisui quickly rushed over and supported him.
After getting closer, he saw the boundary between old and new skin, confirming that this had just grown. Unable to resist, he reached out and touched the new skin, feeling its softness and slight stickiness.
Shisui's cultivation had made his sense of touch more sensitive. As he touched it, he even felt the movement of the muscles beneath, the flow of blood, and a rather strong chakra fluctuation.
All these sensations gathered together, letting him feel intense, surging vitality.
At that moment, Uchiha Yoru had just returned after taking a shower.
When he saw Uchiha Ayumi standing on the ground, his sharp gaze swept over like a knife, scaring Ayumi so badly that he hurriedly lay back on the bed.
Uchiha Yoru scolded him with great dissatisfaction. "Hmph. I already told you that they just grew back and are fragile in every aspect. I told you to lie down for four more hours to stabilize your condition. You couldn't even endure ten minutes?"
Uchiha Ayumi awkwardly explained, "Hehe, I really couldn't help it. I was too excited."
"Heh. Do your legs, knees, ankles, and soles hurt?"
"They hurt…"
"Try getting down one more time and see whether I cut them off and reattach them three months later."
"Yes, yes, yes. I won't dare again. I definitely won't dare again."
Uchiha Ayumi's face turned pale with fright, and he repeatedly promised that he would honestly wait four hours.
Uchiha Yoru checked briefly, then adjusted each misaligned joint back into position. He also used natural energy to nourish the damaged joints and ligaments.
After finishing all of this, he said to Uchiha Ayumi, "Ayumi, I wasn't joking. Your new legs, feet, and arm are like newborn infants. They can't bear your body weight at all."
"Before the condition fully stabilizes, your joints can't even withstand the pull of your new muscles. If you had dared to jump just now, or even fall, the key ligaments would definitely have snapped."
"Look. Your fingernails haven't even grown out yet. Do you want to grow some heaven-defying round fingers?"
Uchiha Ayumi was scolded until he did not dare say a word. The pain from having his joints adjusted also taught him the severity of the matter, and he no longer dared take any chances.
Uchiha Yoru moved quickly. Ayumi's body was soon adjusted one by one, then smeared with octopus oil and wrapped in thick bandages.
Finally, Yoru said, "Endure a little longer. By dinnertime, you'll recover to the state of a normal person. Tomorrow, you can start physical training."
"So don't rush. Understand?"
"Yes, Brother Yoru. I understand."
"Heh."
Uchiha Yoru's eyes turned red. The three tomoe spun rapidly, making Uchiha Ayumi's expression change drastically. He shouted in panic, "No, I… don't… want…"
Before he finished speaking, Uchiha Ayumi fell into sleep uncontrollably, as if he had been anesthetized.
Uchiha Shisui was a little curious. It was just hypnosis to sleep. What was Ayumi so afraid of?
In the following time, Shisui discussed optimization of the basic methods with Uchiha Yoru. Then he was sent out to buy a large amount of milk, pork liver, and half a pack of lime powder.
Then Uchiha Yoru began preparing lunch. His movements while cutting, slicing, tossing the wok, and kneading were smooth like flowing clouds and water, pleasant to watch.
He even opened a small platform in the kitchen to process the pork liver.
Unlike the stir-fried pork liver Shisui imagined, Uchiha Yoru crushed the pork liver and soaked it in clean water.
Then he used Fire Release: Great Fireball Technique as a strong light source and used pigskin as raw material to produce several different esters.
After that, he used the difference in solubility of ester compounds to extract a large amount of crystals from the pork liver water. Finally, through a saponification reaction, he generated relatively high-purity vitamin D3.
This thing was also called cholecalciferol. It was the best element for promoting calcium absorption. It could regulate calcium and phosphorus metabolism, induce calcium-phosphorus deposition in bones, and greatly promote bone growth.
Normally, as long as a person maintained enough sunlight exposure, they could meet their needs.
But Uchiha Ayumi's bones first had to be completely replaced by real bone. The calcium he needed was abnormal. Without a large amount of vitamin D3 as assistance, the calcium intake required would be enough to cause calcium poisoning.
As for the calcium supplement, of course it was calcium carbonate made from lime powder.
Although eating too much would cause constipation, that was not a major problem.
By dinnertime, Uchiha Ayumi walked out of the sickroom with a dark expression. When he saw Uchiha Yoru, he jumped in fright and remained dazed for quite a while before returning to normal.
Uchiha Shisui asked curiously, "Brother Ayumi, what happened to you? And why are you so afraid of Brother Yoru's hypnosis?"
Uchiha Ayumi smiled bitterly. "Shisui, you're a genius. You can't understand the suffering of ordinary people like us."
He raised his head toward the sky, keeping his fearful tears trembling in his eyes, and whispered, "Brother Yoru was very dissatisfied with our learning progress. Every time he hypnotized us, he made us study in our dreams."
"Memorizing books, doing questions, and exams…"
"If we failed the exam, we couldn't wake up. A genius like you can never understand that terrifying despair."
Uchiha Yoru walked over carrying a large basin of stewed ribs and glared fiercely at Ayumi, threatening, "Still dare complain? Believe it or not, next time I'll make you study mathematics in your dreams?"
Hearing this, Uchiha Ayumi's entire body turned gray. Trembling, he begged for mercy, "Spare me, Brother Yoru! I really can't learn mathematics! I'll die in the dream. I absolutely will!"
"Hmph. If you studied properly, would I have needed to develop Genjutsu: Dream Learning Technique?"
"Eat!"
"Yes, yes, yes."
Seeing the stack of bowls and chopsticks Uchiha Yoru handed over, Uchiha Ayumi subconsciously stretched out both hands and took them. Then he filled a bowl of rice from the pot and first handed it to Uchiha Shisui.
At that moment, he saw the smiles on Uchiha Shisui and Uchiha Yoru's faces. After freezing for a moment, he realized he had used both hands.
Not only did he not feel the pain and lack of coordination from four hours ago, he had not even been affected by the habits he had formed during these months of disability. Everything had been so natural.
In an instant, he understood.
The dream learning had not merely been torture. It was also the best method to help him get rid of his incorrect living habits, making him painfully familiarize himself in dreams with the state of having complete hands and feet.
Uchiha Ayumi smiled freely, distributed the rice bowls, including the special bowls for Miwa Masayo and Yaeko, then sat down and ate heartily.
Uchiha Yoru's great kindness could not be expressed in words.
Then there was no need to say more.
Uchiha Ayumi had already made his decision. From now on, he would follow Uchiha Yoru's lead. In this life, there would be no second word.
Uchiha Yoru was very satisfied with Ayumi's attitude, and even more satisfied with his condition.
During six months of disability, Ayumi had shown firm will. He had not become discouraged about life, nor had he collapsed emotionally because of despair and caused his three-tomoe Sharingan to awaken early.
But the two-tomoe Sharingan he had awakened through training after the battle was full of ocular power. Clearly, even after becoming disabled, he had not given up cultivation, and had even maintained his body at a very high level.
Uchiha Ayumi was an outstanding talent.
And his loyalty to Uchiha Yoru was clearly visible and unquestionable.
Although Ayumi was not some genius, there was no more suitable successor than him.
Uchiha Yoru decided that after Uchiha Ayumi fully recovered, he would also accept him as a disciple, pass on true immortal cultivation, and guide him onto the immortal path.
After eating and drinking his fill, Uchiha Yoru took out prepared calcium tablets and milk, stuffed them all to Uchiha Ayumi, and instructed, "Eat thirty calcium tablets every day and drink one liter of milk. Only this can help you recover quickly and avoid osteoporosis."
"I understand, Brother Yoru."
"Also, you can start training tomorrow, but the intensity absolutely cannot be too high. You've gained one new arm and two new legs. Structural anemia is inevitable. If your training intensity is too high, it will be dangerous."
"Yes. I'll definitely be careful."
"Good. Go."
…
Early the next morning, after Uchiha Yoru and Uchiha Shisui absorbed the morning purple qi, they went together to the study group, which was said to have become more and more chaotic.
Unlike the crude makeshift team Uchiha Yoru had created at the beginning, the current study group had built a brand-new training ground and dormitories near the shrine. There were even functional buildings such as a cafeteria, meeting room, toilets, bathhouse, and so on.
But when Uchiha Yoru arrived, the study group members were not training. Instead, they were scattered around the training field, gathering in twos and threes to chat and play.
Among these Uchiha children were old members. When they saw Uchiha Yoru, they instinctively jumped up and stood perfectly straight on the spot.
Some members recognized Uchiha Shisui. Seeing him following behind Uchiha Yoru, they also realized the newcomer was the chairman who had taken office more than half a month ago but had never appeared.
So these Uchiha also hurriedly stood up, imitating their seniors and standing at attention.
Among the remaining Uchiha, the clever ones noticed something wrong from the atmosphere, so they followed and stood up straight as well.
The last ones were children who neither recognized Uchiha Yoru nor respected Uchiha Shisui. Basically, they came from elder families and had proud personalities.
It had to be said that although they came from elder families, they were not direct descendants. They were closer nephews, grand-nephews, and the like.
The true sons and grandsons of the elders would not appear here.
Uchiha Yoru smiled faintly.
In the next instant, a sharp light shot from his eyes and swept across the entire training ground. Every Uchiha who had stood up felt their heart tighten and involuntarily stood even straighter.
As for those lying down, sitting, or even lounging crookedly, they felt as if their foreheads had been struck hard by a heavy hammer.
Their eyes rolled upward, and they silently fainted to the ground.
Uchiha Yoru said, "Shisui, you lead everyone and begin training. This morning will be formation training."
Uchiha Shisui answered without hesitation, "Yes!"
Uchiha Yoru strode toward the meeting room. As he walked, he said, "Before training begins, throw those unconscious ones to the side first. When I return, I'll decide whether they stay or leave."
Uchiha Shisui could not help asking, "Brother Yoru, don't you need me to punish them?"
Uchiha Yoru looked back and smiled. "Did you forget what happened last night?"
Uchiha Shisui froze. "Ah?"
Uchiha Yoru said, "I've already punished them."
Uchiha Shisui immediately understood. "I understand, Brother Yoru."
After that, Uchiha Shisui began shouting, calling his little companions over and leading everyone to reorganize their teams.
Amid Shisui and the others' clear calls, Uchiha Yoru strode into the study group's meeting room.
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