With a reputation of 70,000, one leader travels across countless worlds with his adventure team.

A few days later, Kagaya Ubuyashiki received a letter from Ms. Tamayo. She said that they couldn't make a drug to completely kill Muzan, but they had managed to develop a drug that could accelerate the aging of demons and prevent them from splitting.

Kagaya Ubuyashiki hurriedly instructed Tamayo to send all the medicines to headquarters. Tamayo replied that she would personally take action this time and teach Muzan a profound lesson.

Two days later, Tamayo arrived at headquarters. Kagaya Ubuyashiki convened a meeting of the Pillars and introduced Tamayo at the meeting. Only now did the Pillars realize that Tanjiro had been collecting blood from demon hunters for Tamayo's research.

Everyone then understood Tanjiro's determination to defeat Muzan. They hadn't expected the cheerful Tanjiro to be so deeply hidden. Even Sanemi praised Tanjiro, saying, "Well done!"

Kagaya Ubuyashiki had been observing Shinobu's condition. This time, with Hakutaku by her side, Shinobu's condition was noticeably better, and she was no longer as resistant to the presence of a demon beside her.

Afterwards, Kagaya Ubuyashiki assigned Shinobu the task of researching more types of medicine to deal with Muzan with Tamayo, and Shinobu readily agreed.

Kagaya Ubuyashiki looked at Shinobu Kocho's natural smile and knew that this was Kocho's own choice. He nodded with satisfaction. It seemed that after Kocho avenged her sister and then had the Nezuko incident, Kocho's view of demons was quite different from before.

After arranging for Shinobu and Tamayo to continue their research on the potion, Kagaya Ubuyashiki and the Pillars began discussing the battle plan. Hakutaku also joined in the planning of the battle plan with Raphael, Kage, Tifa, and Momo.

Considering that whether the Pillars enter the Infinity Castle space to fight or engage in open battle with Muzan at night, everyone needs to have positions for both defense and offense.

Here, we also need to ask Yushiro, who came with Tamayo, for help. Yushiro's Blood Demon Art is related to vision, and he can draw the Blood Demon Art as a talisman and stick it anywhere to block the demon's vision.

Upon hearing this, Bai Ze thought that he should send Xiao Meng out in a few days to send Mengmeng and Li Qinglu back to the space first, and then let Xiao Meng and Yu Shilang work together.

Let Xiaomeng's robot and the Kasugai Crow with Yushiro's blood talisman explore the Infinity Castle space, help Yushiro control Nakime, and send everyone and Muzan away from the Infinity Castle.

Finally, Kagaya Ubuyashiki's suggestion to use himself as bait to lure Muzan was strongly opposed by the Pillars, but Kagaya Ubuyashiki persuaded them:

“If I weren’t used as bait, Muzan would go looking for Nezuko. If Muzan used the alternate dimension city that Sanemi mentioned to take Nezuko away, all our plans would be in vain. Only by using me, who is on par with Nezuko, as bait can we trick Muzan.”

The Pillars gritted their teeth, wanting to object to their Lord's words, but they also understood that a worthless target would not attract Muzan.

Bai Ze looked at the Pillars, who seemed to be saying goodbye to Ubuyashiki Kagaya, and said mysteriously:

"Don't worry about our lord's safety. Raphael will give everyone a surprise. I guarantee that our lord will be safe and sound. Let's focus on how to eliminate Muzan. This time, he has gathered all the powerful demons outside into that space."

Because the exact number of demons was uncertain, Kagaya Ubuyashiki arranged for everyone to move out in small groups. As long as Muzan took the bait, the Hashira would quickly return to defend and fight with the goal of capturing Muzan.

If the Pillars are taken into the Infinite Castle space, they must help Yushiro find the demon controlling the space and find a way to send all the Pillars and Muzan out.

In the following days, Shinobu Kocho and Tamayo worked together to create a drug targeting Muzan Kibutsuji. They used various ingredients to prepare the drug, based on the premise that the toxins would be broken down by Muzan.

Shinobu Kocho and Tamayo have successfully created a human-turning drug using various medications combined with Nezuko's blood. This drug can turn demons back into humans. In addition to the aging drug and the drug that Tamayo previously created to prevent splitting, three kinds of drugs to deal with Muzan are now ready.

Shinobu and Tamayo, fearing that the dosage of these medicines was insufficient, used wisteria poison to concoct a fourth cell-destroying medicine to ensure that Muzan would be tricked when breaking down the medicine, thus completely eliminating any possibility of Muzan's escape.

 …

In the days that followed, the pillars began to arrange tasks and patrols according to the previous battle plan. Bai Ze also took some time to return to his personal space, send Li Qinglu and Mengmeng back, pick up Xiaomeng, and release Yaleijia to start exploring the surrounding situation.

After discovering an eyeball with the character "肆" written on it appearing near the camp and secretly investigating the situation at night, Bai Ze sent a message to the Ubuyashiki Kagaya residence and the Pillars using a special signal.

The headquarters initially feigned a tense but actually relaxed stance, and three days later...

A sinister figure dressed in a white suit, wearing a black cape, and sporting a curly hairstyle suddenly appeared at the foot of the mansion. Stepping on the sharp, cold air, he slowly walked into Kagaya Ubuyashiki's residence.

Muzan's appearance caused the night temperature to drop several degrees. When Muzan reached the door of Kagaya Ubuyashiki's house, Kagaya could sense that Muzan was already in front of him without even opening his eyes.

Kagaya Ubuyashiki, accompanied by his wife Amane, sat up, slowly opened his eyes, and said:

"You've finally arrived, Kibutsuji Muzan, or as you're known, Ubuyashiki Muzan..."

Muzan frowned slightly:

"Extremely boring..."

“I knew you would definitely come, because you deeply hate me... and the Ubuyashiki clan. As long as you know about me, you will definitely come in person.”

"You've been ruining my plans for a thousand years. Ubuyashiki, I can let you choose how you die."

"Muzan, because you became a demon, the heavens have placed an indelible curse on the Ubuyashiki clan, causing all the infants born into our clan to be weak, sickly, and die young."

Just as my clan was about to perish, a priest reminded us that evil spirits had appeared in our bloodline, and only by doing everything in our power to eliminate them could we break the curse.

Since then, I, Ubuyashiki, married a woman from a Shinto priest family, and was finally able to give birth to a healthy baby. However, the baby boy would still gradually develop an incurable disease after reaching adulthood, and would not live past the age of thirty.

"Muzan, this is the retribution you brought upon the Ubuyashiki clan! From this day forward, I will remove this curse upon you in my place, on behalf of my Ubuyashiki clan!"

As they were talking, the mansion suddenly exploded violently, with flames shooting more than ten meters into the sky. The Ubuyashiki twins and several other children, protected by Tifa and a group of ordinary team members, stood on a distant hilltop and silently watched the mansion explode.

The twins hugged each other, silently shedding tears. Tifa stepped forward, embraced the two children, and comforted them, saying:

"Don't worry, with Sister Raphael here, your parents will be fine."

The twins excitedly looked up at Tifa, who smiled and patted their heads.

"Guardian of Holy Light"

At the very moment of the explosion, Raphael, the aerial combat machine summoned by Xiaomeng high in the sky, cast a protective shield over Kagaya Ubuyashiki and his wife Amane.

Raphael released his grip on the gale and landed in front of Kagaya Ubuyashiki and his wife. Kagaya Ubuyashiki and Amane touched the protective shield covering them and said with a smile:

"Lord Bai Ze and Miss Raphael are truly remarkable; they were able to protect people from harm even in such a situation."

Seeing the flames, the Pillars had already begun to rush back. Muzan, who had been blown away, was using all his energy to repair his body. However, Kagaya had mixed and fused many kinds of small crystals into the bomb, and also added a large amount of iron filings.

Muzan could only endure the burning, poisoning, and other buffs to repair his body while expelling the iron filings and residue from his body.

Muzan, whose two legs had been restored, looked at the woman standing in front of Kagaya Ubuyashiki with his newly restored single eye.

The light-attribute energy emanating from Raphael made Muzan very uncomfortable, and he desperately wanted to stay away from Raphael.

"Spear of Victory"

"Sacred Lock Ring"

Before Muzan could even run away, he was stabbed to the ground by the light spear, and then another light circle trapped him.

At this time...

"bass!"

As Muzan was being pierced by Raphael's light-attribute energy and struggling, Tamayo, whose body was covered by the blood talisman that Yushiro had used to obscure his vision, stabbed Muzan directly in the recovering stomach with her fist.

Tamayo's beautiful face contorted in a grotesque grimace as she glared at Muzan and said:

"Muzan, guess what's inside the fist you absorbed? I want all the demons in the world to never see tomorrow's sun!"

"Tamayo, I never thought you'd dare show your face in front of me again..."

"Second Form: Shattered Sky"

With blood-stained runes covering his body, Gyomei the Stone Pillar appeared from behind Muzan and swung his flail, smashing it directly into Muzan's head, shattering Muzan's head and head above the shoulders.

Bai Ze also rushed out from the other side, wielding the Wrath of the Mad Dragon, and slashed at the arm that Tamayo had stuck in Muzan's stomach. In an instant, he took out a bunch of life potions with his left hand and stuffed them into Tamayo's clothes through the opening. Then, he grabbed Tamayo's waist and threw her away.

"Your mission is accomplished!"

I must say, Miss Tamayo's breasts are quite ample; Bai Ze finds them rather nice~

Bai Ze flung Tamayo away, turned around, and slashed at the blade with one hand. Blood energy filled the blade, unleashing a "Mountain-Shattering Earth-Splitting Slash!"

Bai Ze unleashed his skill, smashing it down on half of Muzan's body, splitting Muzan's still-recovering lower body from a "π" shape into an "I" shape.

The ground beneath Muzan's feet shattered, spewing forth streams of magma that scorched the remaining parts of Muzan's body.

At this moment, all the Pillars arrived, and before they could even attack Muzan, they heard Gyomei shout:

"Those two legs in the middle of the arena belong to Muzan Kibutsuji. Even if you cut off his head, Muzan won't die; his body can regenerate!"

Upon hearing Gyomei's words, all the Pillars drew their swords and charged towards "π". Muzan, as expected of the progenitor of demons, quickly restored his lower body, which had been scorched by magma, to "π".

"Breath of Mist - Fourth Form: Horizontal Slash"

"The Breath of Insects - The Dance of Butterflies"

"Serpent's Breath - First Form: Serpent Slash"

"Breath of Love - Fifth Form: Wavering Love - Chaotic Claws"

"Water Breathing - Form Three: Flowing Dance"

"Wind Breathing - Seventh Form: Gale - Tengu Wind"

"Sound Breathing - Form Five: Resounding Strings"

"Breath of Flames - Fifth Form: Flame Tiger"

"Hinokami Kagura: Yanghua Tu"

"Blood Fury - Raging Slash!"

All the Pillars unleashed their surprise attacks on Muzan, who, in his hazy state of consciousness, connected with the current Upper Moon Four, Nakime.

"Narume!"

"Zheng!"

A sound of plucking a string rang out, and the attacking Hashira lost their footing. All the Demon Slayer Corps members who had been detected by Nakime's eyes fell into the Infinity Castle through the opening of a door beneath their feet.

The pigs stealing food in the forest, Zenitsu sitting on a rock in deep thought, and Raphael, who had just retreated to the forest with the Ubuyashiki couple, were all instantly pulled into the Infinite Castle.

As Bai Ze fell downwards, he shouted to Xiao Meng:

"Xiaomeng, take Yushiro to her!"

"Roger that!"

Xiaomeng and Yushiro have been pulled into the Infinite Castle space;

"Airdrop support"

"Interceptor Factory"

A large number of Kasugai and Xiaomeng robots began searching for Nakime's location in the Infinite City.

The falling Muzan was transported to a high platform, where it took him quite a while to repair his body. While repairing his body, he didn't forget to let his ramen-noodle hair grow back.

Bai Ze used his skills and aerial combos to change positions, and then used Silver Light Slash to smash down on the high platform where Muzan was located. Flame Pillar Kyojuro and Wind Pillar Sanemi also landed around Muzan, while the others were scattered throughout the Infinity Castle.

Muzan raised his hand, conjuring a fist of flesh and blood to block Bai Ze's descending attack, while a bunch of blood spikes grew from his right hand, heading towards Kyojuro and Saneiza.

Muzan's fleshy fist began to crack the moment it touched Bai Ze's sword blade;

"boom"

Muzan's newly recovered left hand, left kidney, and left leg were then separated by Bai Ze;

"Fourth Form - Rising Sandstorm"

"Fourth Form: The Winding Path of Blazing Flames"

Kyojuro and Sanemi did not stop and continued their attack on Muzan.

The scattered Pillars and Demon Slayer Corps members began to explore the surroundings and search for their teammates to gather. Raphael cleared the room of demons he sensed behind him and used his energy to perform a super purification of the room before the demons could launch an attack.

After rescuing four Demon Slayer Corps swordsmen by crossing a corridor, Raphael treated his team members and continued exploring. During this time, he encountered Xiaomeng's robot. Raphael told Xiaomeng his location and then continued to lead a few young swordsmen to clear the surrounding area.

Zenitsu, with his feet firmly on the ground, casually killed the three little demons that pounced on him. He walked out through the partition of the house, his sharp eyes observing his surroundings. He had noticed the eyes watching him when he was sitting quietly in the forest.

Zenitsu didn't move because he wanted to enter the Infinity Castle to find his senior brother Kaigaku and avenge his master.

Inosuke, in his excitement, shredded the room and the ghost into pieces, shouting joyfully:

"Hahahaha, you all, prepare to die!"

The Pillars also began fighting in various places, but none of them forgot their mission: to find Nakime, who was controlling the Infinity Castle, and find a way to get everyone and Muzan out.

 …

Muzan, with whips in both hands and a living whip on his back, revealed his true form, while Bai Ze, who was in berserk mode and possessed the Free and Unfettered Divine Skill, and Kyojuro, who was wielding the Transparent World and the Crimson Blade, and Sanemi had already switched locations several times in their fight.

The floor beneath Muzan and the group could not withstand their second frenzied attack. Hakutaku had already been sent away by Nakime once, but he found a good spot and fought his way back from the space above and to the side of Muzan's head.

During the battle, Mitsuri (Love Pillar), Obanai (Snake Pillar), and Komugi (Kage) all appeared nearby, but were teleported away by Nakime before they could approach.

After killing several more demons, Muichiro was suddenly transported to a room with doors on all four sides. Sensing something was amiss, Muichiro activated his breathing technique and stabbed his 'Crimson Blade' directly into the floor, which emitted a scream like a human's.

Having seen through the Demon Blood Demon Art and slit the demon's neck with a single slash, Muichiro stood alone at the doorway of a row of rooms. Muichiro tilted his head and murmured a puzzled "Hmm~".

At this moment, Nakime, whose figure was accidentally discovered by the aerial combat machine, Gale, plucked the strings of her harp and changed her position. As a result, the wall of the room in front of her instantly shattered, and the Love Pillar and the Serpent Pillar emerged from behind the wall.

The Serpent Pillar charged forward, sword in hand, muttering:

"Got you!"

The next second, the Serpent Pillar's position changed, and Mitsuri was gone. He was surrounded by a circle of burly demons. The Serpent Pillar saw a bunch of fists coming down on him and he used the "Fifth Form: Winding Serpent".

Obanai charged forward swiftly, unleashing a serpentine slash that burst forth from the midst of a horde of demons, slaying all the demons behind him in the process.

Just then, Komugi and Yushiro ran up from the side corridor by Obanai's door. Obanai quickly told them about the layout of the house where Nakime was, and asked Kasugai-rai and the robot flying in the sky to find Nakime's location.

The Kasugai crows, carrying Yushiro's blood talisman, hurriedly searched for similar floors and spaces. Xiaomeng's robots also began recording information from the surrounding rooms. Xiaomeng also received Nakime's exact appearance from the aerial combat machine, Gale.

Immediately, Xiaomeng sent a message to the kasugata crows in the city: Nakime was wearing a black yukata, had long black hair, and was holding a plucked string zither;

The ravens began searching for Narumi and relayed the information to the pillars they found.

A great battle erupted in the Infinity Castle. The demons summoned to the castle began to emerge from their rooms in search of the swordsman, while the Demon Slayer Corps cleared out the demons they found, one by one, room by room.

 …