Chapter 329: Infinite Train

"How do you feel, Nezuko?"

Tanjiro looked at his younger sister with worry.

Although Jiu Shu, a dignified Demon-Exorcising Master, was highly experienced and unlikely to make a mistake, these were, after all, two different worlds, and there were slight differences.

"Pfft..."

The miniature version of Nezuko suddenly tilted her head back, limbs splayed, and lay on the ground.

A puff of pitch-black smoke spewed from her mouth.

It was as if she had swallowed a lit firecracker in her stomach.

Tanjiro was so startled his eyes nearly popped out, and he hurriedly shook Nezuko incessantly.

"Wait, Tanjiro..."

Urokodaki Sakonji noticed the clue and hurriedly pulled back the panicked Tanjiro.

Just then,

The miniature version of Nezuko's body gradually returned to normal, transforming into her human-era appearance, while the pitch-black smoke like before continuously seeped out from her skin pores.

It was foul-smelling and evil.

"This is... demon blood?"

Tanjiro's nose twitched, and upon smelling this foul odor, he immediately recalled the scene where his entire family was slaughtered by the Demon King.

At that time, this faint scent had remained on Nezuko's body.

It was the blood of Kibutsuji Muzan!

Under the effect of the 【Five-Yang Red Pill】 refined by Jiu Shu, it was continuously purged from her body by medicinal power that was like the sun, yet exceptionally gentle.

"It's working!"

Tanjiro trembled all over with excitement, covering his mouth for fear of disturbing Nezuko's transformation.

Along with the seeping out of the demon blood,

The fangs in Nezuko's mouth began to gradually shorten, and her demon pupils also gradually shifted toward those of a normal human.

I do not know how much time passed,

Nezuko, from whose skin black smoke no longer seeped, climbed up blankly and wobbled to the edge of the room.

"Nezuko!"

Tanjiro let out an exclamation, realizing it only after the fact,

But he saw that Nezuko was already bathed in the sunlight.

"Bro... brother... I..."

Nezuko felt her head dizzy and heavy; seeing the familiar man before her, she wanted to speak, but it was somewhat sluggish.

Tanjiro rushed over, pulled his sister into his arms, and tears streamed from his eyes.

"Nezuko... Nezuko... Nezuko... This is truly wonderful!"

It was as if a heavy shackle had been broken from Tanjiro's heart, and he wept loudly without any restraint.

All this time, since his father died early, Tanjiro had shouldered the responsibility of the family, taking care of his younger siblings and maintaining their livelihood by selling charcoal.

Even if it was bitter or tiring, he had never complained.

Until the Demon King killed his entire family, and even his sister turned into a man-eating demon,

He still gritted his teeth and held on, taking up the Nichirin Sword capable of slaying demons, protecting his sister, and attempting to become a member of the Demon Slayer Corps.

Until now,

Tanjiro finally acted like a child who had not yet come of age, overcome with excitement because of his sister's rebirth.

"Because she was a demon for too long, her memories are somewhat blurred; they should gradually recover."

Urokodaki Sakonji did not disturb Tanjiro.

A moment later, he began to observe Nezuko's physical condition, and the astonishing discovery made him unable to help but exclaim aloud: "How is this possible?" Hearing the sound,

Tanjiro's heart rose again, and he asked: "Is there a problem, Master?"

Urokodaki Sakonji's expression was solemn; he stared closely at Nezuko, and after confirming he had not made a mistake, he said: "Nezuko has turned back into a human, but her physical functions are terrifyingly strong, still equivalent to her demon period."

Having recovered as a human, Nezuko's physical skills still maintained the strength of a demon.

And she was no longer afraid of sunlight.

Tanjiro also felt it was inconceivable and asked in surprise: "There is actually such a thing?"

He then recalled Jiu Shu's deduction regarding the Demon King: the birth of the Demon King relied on the world's great trends and yin-attribute agents, causing life to undergo a certain degree of evolution and mutation.

If this mutation were correct, it would be a product similar to a Yin God; in Jiu Shu's world, that would be a Night Wandering God or an Underworld Ghost General—such yin-energy deities.

But if the mutation were incorrect or failed, they would be monsters like zombies or vengeful ghosts.

Kibutsuji Muzan was clearly the latter, so the humans he turned into demons were, like him, life forms with failed evolution.

And the medicinal power of the 【Five-Yang Red Pill】 compensated for the failure of the mutation to a certain extent, causing it to undergo a positive change.

It was similar to a weak effect of a portion of the 【Blue Spider Lily】 that Kibutsuji Muzan dreamed of completing.

Therefore, the current Nezuko was not a demon, but a new human in a brand-new state that appeared after improving upon the failed mutation of Kibutsuji Muzan.

Even Jiu Shu had not anticipated this change.

"The Demon Slayer Consciousness is quite good at borrowing momentum."

Inside the Reincarnation Space, Fang Yi saw Nezuko overcoming the sunlight, the corners of his mouth curled up slightly, and he said: "Under normal circumstances, it is very difficult for products of failed mutations like Kibutsuji Muzan to make up for their defects."

A benign mutation, to put it bluntly, is just like buying a lottery ticket; there are countless possibilities in the code of the soul and genes, and perhaps it would take tens of thousands or millions of demons eating the 【Five-Yang Red Pill】 for a benign mutation to occur once.

However,

In order to eliminate the failed product that was Kibutsuji Muzan, the Demon Slayer Consciousness actually spared no expense in consuming a large amount of its origin, directly using Nezuko, who had eaten the 【Five-Yang Red Pill】, as a template for a benign mutation.

In other words, the Pill that Tanjiro brought back from the mission world, from this moment on, because of the intervention of the Demon Slayer Consciousness, possessed an effect similar to the Blue Spider Lily.

It is capable of purifying the failed blood of Muzan Kibutsuji.

"Very well, the Demon Slayer World wants to erase Muzan Kibutsuji, and it has spared no effort to use the Samsara Game to create new humans."

Fang Yi smiled and muttered to himself: "To me, these new humans are all excellent players; both sides will cooperate for mutual benefit."

The news of a demon turning into a human blew toward the headquarters of the Demon Slayer Corps like a hurricane, and was then distributed across the entire Demon Slayer Continent as a seed of hope.

With the guarantee from the former Water Pillar Urokodaki Sakonji, and the diagnosis after Oyakata-sama personally summoned Tanjiro, the accuracy of this news was confirmed.

The Demon Slayer Corps and Muzan Kibutsuji have been locked in a bitter struggle for nearly a thousand years, with countless humans killed or injured and loved ones turned into evil demons; now, a way to turn demons back into humans has finally been found.

"Is that so?"

Kagaya Ubuyashiki was full of excitement; he no longer had his previous weak state, and as a fellow player, his strength had already surpassed all the Pillars, so that even when facing the Upper Rank demons who could allegedly kill a Pillar-level Swordsman in seconds, he could win easily.

Holding a 【Demon Hunting Weapon】, he was the absolute nemesis of demons.

"It doesn't matter, I can give you all of my Reward Points; as long as the humans who have been turned into demons can be saved, every sacrifice is worth it."

Kagaya Ubuyashiki did not hesitate in the slightest; upon hearing that the Pill in Tanjiro's possession capable of turning demons into humans came from 【Jiu Shu's Yizhuang】 in a mission world, he was willing to empty out all his remaining assets to exchange for those Pills.

"In the past, it was always demons attacking humans, treating the children of the Demon Slayer Corps as blood-food, but now..."

Kagaya Ubuyashiki was in high spirits and waved his hand, saying: "Kill those demons with countless crimes, save those demons who have not yet fallen; the Shadow of Muzan Kibutsuji will be ended in our era!"

Tanjiro was exceptionally promoted to a Swordsman of the Demon Slayer Corps, without needing to undergo the trial of the Wisteria Prison.

His first mission,

was to go to the Infinite Train with the Flame Hashira to handle the 【Ripper】 incident, where an evil demon was suspected of causing chaos.

Just as the conflict between the Demon Slayer Corps and the Demon King in the Demon Slayer Continent was intensifying, the previously sent 【Myriad Worlds Invitation Letter】 received a response.

Three figures appeared on the 【Ten Thousand Year Snow Mountain】 of the Reincarnation Space.

(End of this chapter)