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"Buddha said: There are three great sufferings in life: meeting those you resent, being separated from those you love, and failing to obtain what you desire. Mr. Uchiha Nagi, only by letting go and accepting can you find liberation. I believe Miss Kagome, in the afterlife, would not want you to grieve too much for her."
In the basement, Tamayo was bandaging everyone's wounds. Looking at Uchiha Nagi, who remained as cold as ice, she couldn't help but try to console him.
Uchiha Nagi calmly said, "I'm not that sad. I only knew her for a few days…"
Tanjiro, who was nearby, thought to himself, 'Such a sorrowful tune, and he's not sad? And I clearly smelled it; he can fool others, but not me~'
This was Tanjiro's special ability: a sense of smell that could detect body odor and even emotions. He could perceive people's seven emotions and six desires, their joys, angers, sorrows, and happiness, all through his sense of smell.
"Mr. Uchiha Nagi, how do you know Water Breathing? Are you also a member of the Demon Slayer Corps?" He couldn't help but be curious, because in the final blow that defeated Zhu Sha Wan, Uchiha Nagi used his Water Breathing.
Tamayo and her attendant, Yushiro, were also curious. As for Nezuko, she had wandered around for a while, felt bored, and had already fallen asleep.
"I am not a member of the Demon Slayer Corps. As for why I know Water Breathing, I learned it from you~"
"From me?!" Tanjiro looked utterly bewildered. 'You learned it just by watching once? I spent two years studying and mastering that Breathing Technique, and you just watched once and got it?'
Ignoring the petrified Tanjiro, Uchiha Nagi turned to Tamayo and said, "Doctor Tamayo, I want to start the surgery as soon as possible. Do you have any plans for today? If not, how about we rest this morning and start this afternoon?"
"Oh, oh, are you ready on your end? I'm available anytime. Demons have incredibly strong recovery abilities, and I barely participated in last night's battle. You, however, went through such an intense fight. Should we perhaps wait another day?" Tamayo asked.
"Then this afternoon it is. A morning's rest is enough." Uchiha Nagi nodded to Tamayo. "I'll also trouble you to prepare a room for me. I'll rest for a few hours, and we'll begin the surgery this afternoon."
"Alright. Yushiro, please take Mr. Uchiha Nagi to rest."
"Yes, Lady Tamayo~" Yushiro, with a lovesick expression, immediately got up. He didn't want to waste a single moment, only wishing to return to Tamayo's side as soon as he had escorted Uchiha Nagi to his room.
After thanking him, Uchiha Nagi followed Yushiro down the corridor. The reason for his haste was that he felt a renewed sense of crisis.
According to Tamayo, those two were not among the Twelve Kizuki, but in Uchiha Nagi's opinion, even those unranked small fry had the strength of a Jonin. Wouldn't the Twelve Kizuki be even stronger?
Based on his experience from last night's battle, the demons in the Demon Slayer World, with their immortality, were each comparable in strength to a Chunin. Without a nichirin blade, no Chunin could defeat them one-on-one—and he meant normal Chunin, not the Konoha 12… Then, the two demons who came last night, Ya Habaki and Zhu Sha Wan, already possessed the strength of a Jonin. Without a nichirin blade and without knowing their abilities, even a Jonin couldn't handle them. The reason was simple: their immortality was too overpowered.
As long as they are human, combat will lead to fatigue, muscle soreness, and Chakra depletion. The more intense the battle, the faster power is lost. But demons do not—
Which means that even if one is significantly stronger than a demon, if the battle becomes prolonged, they will eventually be defeated due to exhaustion.
Victory can only be achieved by overwhelming them, cutting off their heads with a nichirin blade in one go, preventing them from regenerating.
Fortunately, according to Tamayo, the strongest of the Twelve Kizuki also meant their numbers were extremely scarce.
However, Uchiha Nagi would not entrust his life to the chance that the enemy hadn't discovered him. Last night, he learned that in the eyes of demons, he was considered the ultimate rarity among rare blood, like Tang Sanzang's flesh… This wasn't surprising, given Uchiha blood—
Therefore, Uchiha Nagi decided to accelerate the process. The experimental data from the past few days had already indicated that there should be no rejection reaction after he transplanted White Zetsu's arm.
Uchiha Nagi speculated that this arm had been integrated by Obito for a long time, so any rejection issues had already been resolved. Transplanting this White Zetsu arm, which Obito had used, would pose no problems for him.
After the transplant, he wouldn't have to worry about his Mangekyo eyes going blind from overuse of pupil power. This way, he could boost his strength without any reservations.
Unlike Itachi and Obito, Uchiha Nagi's Mangekyo did not possess direct combat abilities; both were support-type.
However, they were support of an heaven-defying level. As long as he saw a Breathing Technique once—
Thinking of this, Uchiha Nagi's heart burned with anticipation. What would happen if he copied all the Breathing Techniques in this world?
Quality over quantity. Uchiha Nagi knew many Ninjutsu, but he was like a certain Hokage scholar—knowing much but mastering little. This was his greatest frustration.
Because he didn't have a strong mentor!
Reality is different from novels. Even the most talented protagonists have teachers to guide them; there's no situation where someone like Zhang Wuji can achieve great mastery by practicing alone.
And having a suitable teacher's guidance is several times more effective than self-effort.
For example, Kakashi, as the teacher of Naruto and Sasuke, didn't contribute much to their strength improvement. Later, Naruto found Jiraiya, and Sasuke found Orochimaru, and both their strengths began to skyrocket like rockets. This shows how much a suitable teacher can help a person.
Soon, after half a day of rest, Uchiha Nagi recovered his stamina, and his Chakra had also been replenished earlier with military rations pills.
He arrived at Tamayo's operating room, nodded to her, and quickly got ready. The two walked into a clean room.
Uchiha Nagi opened a storage scroll, and a white arm appeared before them.
"Doctor Tamayo, it's very inconvenient for me to perform surgery on myself with one hand, so I'll trouble you." Uchiha Nagi then created a Shadow Clone.
This Shadow Clone was for him to perform the main surgery, and Tamayo, as a doctor who had lived for several hundred years, would certainly be able to assist without issue.
"I understand. I am also very familiar with human anatomy, so please rest assured." Tamayo smiled and nodded.
Uchiha Nagi then activated Mystical Palm Technique with one hand, and a green Chakra scalpel lit up, beginning to cut open the already healed wound. Throughout the entire process, Uchiha Nagi did not use anesthetic, simply biting down on a towel.
Tamayo, throughout the process, followed Uchiha Nagi's instructions, helping to connect nerves and blood vessels, then joining the two bones. Because Uchiha Nagi firmly believed in the efficacy of the First Hokage's cells, no fixed steel pins were used to connect the bones.
Instead, surgical catgut was used to stitch and secure them. Finally, after all the muscles and blood vessels were connected, the Shadow Clone began to use Mystical Palm Technique Chakra to repair the cellular tissue.
Before long, the white arm and Uchiha Nagi's severed arm were largely healed. There was no visible wound on the surface, only a scar.
Tamayo then took a splint for stabilization and helped Uchiha Nagi secure his arm to prevent the bones from colliding and breaking.
"It's truly incredible. Your medical technique, called Mystical Palm Technique, can heal muscles and skin in such a short time," Tamayo exclaimed.
"It seems I didn't help you at all. I'm quite ashamed."