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

After the head of the family, Kagaya Ubuyashiki, arranged the rotation work that day, all the Pillars returned to their respective patrol and protection areas to arrange their work. After the arrangements were completed, the first batch of Pillar-level members who had undergone special training would return to participate in the special training.

Bai Ze stayed with the head of the family. In the end, Bai Ze and the four girls moved into the Butterfly House because there were too many people. Mengmeng finally found a companion of the same age. Kanzaki Aoi had an extra job every day: catching the mischievous Mengmeng and the "bead-eyed trio" of Terauchi Kiyoshi, Nakahara Sumi, and Takada Naho.

Bai Ze also met the taciturn, timid, and shy Kanao Tsuyuri, the adopted sister of the Butterfly Sisters and the "stepchild" of Shinobu Kocho, the Insect Pillar. Bai Ze rarely saw her speak, and she decided to do things by flipping a coin.

One morning, Shinobu Kocho approached Hakutaku, hoping to learn Raphael's healing techniques through him.

If the Demon Slayer Corps could learn this healing technique, then regardless of whether Hakutaku and Raphael were around, as long as there were invisible members with medical skills nearby, the members hunting demons would have excellent logistical support.

After listening to Shinobu Kocho's words, Bai Ze shook his head and explained to her:

"Raphael's healing techniques are like my special method of observing the blood and qi energy in the human body. They are a unique skill of mine and cannot be taught to others at the moment."

Upon hearing that it was a special skill that couldn't be taught, Shinobu Kocho maintained her smile, but Hakutaku sensed the change in her emotions. Hakutaku chuckled and continued:

"Hehe~ Although Raphael's skills cannot be taught, I have healing and antidote potions with the same effects that I can provide to the Demon Slayer Corps. I wonder if Miss Shinobu would like them?"

Shinobu squinted and said in a strange tone:

"Oh my god~ Lord Bai Ze actually used a precious medicine that can heal the wounded to tease this little lady, hmm~"

Bai Ze was immediately embarrassed and stood there, saying:

Just kidding~ Hehe, here you go~

Bai Ze handed Shinobu a bunch of Master Life Potions, Master Mana Potions, and most importantly, the Great World Item (antidote), and then said:

"The red ones are medicines for healing injuries and restoring life, the blue ones are medicines for restoring true energy. You can try them to see if they work on your breathing technique. The last one is important; it can remove any abnormal status. Remember, any."

Shinobu Kocho picked up a large world mirror, examined it for a long time, and smiled as she said to Hakutaku:

"Lord Bai Ze is truly generous. These medicines are extremely valuable and necessary for the Demon Slayer Corps. I am very grateful for Lord Bai Ze's help."

As she spoke, Shinobu Kocho, sitting down, bowed to Hakutaku.

Bai Ze said with a smile:

"Let's test the medicine's effectiveness. There are still some seriously injured members in the Butterfly House. Let's find a few to give them the medicine and test the dosage to prevent the medicine from being wasted later."

And that Great World Instrument, its effect is very obvious. If any team member is poisoned by blood, they can recover their health after using it.

Shinobu Kocho smiled and picked up several life potions, while Hakutaku took several Great World Spheres. Shinobu led the way, and Hakutaku followed to the room where the injured team members were being treated and resting.

Before they even reached the room, they could hear the voices of some injured team members inside. Shinobu opened the door and entered the room, followed by Hakutaku. Looking up, they saw that a row of about ten hospital beds were all occupied.

Kanzaki Aoi was changing the bandages and dressings for the injured team members in the room when she saw Shinobu Kocho and Hakutaku enter. She quickly bowed to them, and Shinobu nodded and said to Aoi:

"Lord Bai Ze sent a miraculous potion that can quickly heal wounds and detoxify, so we're here to try it on the wounded."

Upon hearing this, Kanzaki Aoi looked at Kocho Shinobu with shining eyes and said:

"Really? If such a medicine really exists, then all the wounded in the Butterfly House can survive. The collection and preparation of wound medicine and antidote are really too limited. We can only give it to the seriously wounded and the team members with large areas of poisoning first. Some team members with poor health died before they could get the medicine. It's really a pity."

Butterfly chuckled and patted Little Sunflower's head, saying:

"It won't happen again; they will all be cured."

This room was full of seriously injured people. Several of them were missing limbs. Shinobu picked up a life-restoring potion and gave half a bottle to a teammate who was the least injured, with a severed left arm and a large gash in his stomach.

After the team member finished drinking the medicine, the painful groans stopped, and Koko Shinobu helped remove the bandages from the injured person's body and arms.

Xiao Kui noticed that the wound she had just changed had healed, and the bleeding had stopped. She happily exclaimed:

"Lord Ren, the medicine is working! It's amazing! The effects are so fast, the wound is almost invisible! This is wonderful!"

As she spoke, tears welled up in Xiao Kui's eyes with emotion. As a nurse at the Butterfly House, she saw injured team members brought in by the Hidden Team every day, and every few days she had to deal with those who died from serious injuries or died before they could receive medication.

Now that such a medicine has appeared that can quickly heal the wounded, it's no wonder that Xiao Kui was so excited that she cried.

Shinobu Kocho immediately placed several bottles of life-saving potions in Himawari's hand as well, saying:

"Give one bottle to each of the most seriously injured, and half a bottle to each of the less seriously injured, and make them all drink it."

Bai Ze also picked up a tongue depressor to help Xiao Kui pry open the mouths of the unconscious team members who couldn't open their mouths to feed them medicine. The three of them worked together and soon finished feeding all the wounded in the room.

Shinobu unwrapped the bandages one by one to check the wounded soldiers' injuries; every single one had been healed. Himawari, with her beady eyes, happily bounced around Shinobu, shouting:

"Yay! That's great, Lord Shinobu, the team members have all recovered!"

Xiao Kui turned around and bowed deeply to Bai Ze again, saying:

"Thank you, Lord Bai Ze, thank you for providing us with the medicine."

Shinobu Kocho chuckled and said:

"Alright, some team members have woken up. Arrange for them to have a physical examination. If there are no problems, they can be discharged. Those who are still unconscious need to be closely monitored. We still need to go see the team members who have been poisoned by blood. Xiao Kui, keep an eye on this side."

Xiao Kui nodded happily and said:

"Leave it to Lord Shinobu!"

Shinobu Kocho nodded with a smile, and Hakutaku patted Aoi's head, smiling without saying a word, and followed Shinobu Kocho out of the wounded soldiers' ward.

Bai Ze followed Shinobu Kocho to the ward of the poisoned team members. To be honest, there were far fewer wounded here, because some of the team members who fought against the demons were so severely poisoned that they died on the battlefield before the logistics team could find or treat them.

The number of poisoned personnel who could be sent back to the Butterfly Mansion for treatment was not as many as those who were injured. Some team members who were both poisoned and severely injured bled to death even if they were not poisoned to death. They were basically beyond saving.

As a side note, those team members who turned into spiders due to poisoning on Spider Mountain have already been saved by Raphael. So now, the Butterfly Mansion only has team members who were poisoned but did not die, sent from elsewhere.

In this ward, the three beady-eyed sisters, Kiyoshi Terauchi, Sumi Nakahara, and Naho Takada, are injecting the poisoned team member with an antidote prepared by Shinobu Kocho. Shinobu Kocho leads Hakutaku into the room, and the three sisters greet Shinobu Kocho and Hakutaku.

The group approached the poisoned team member, and Bai Ze took out the Great World Sphere and directly poured it into the poisoned team member's mouth. Before the three sisters with beady eyes could react, and were about to question Bai Ze about what he had given the team member, they saw the purple patches on the poisoned team member's skin slowly disappear.

Bai Ze then went to the second poisoned team member and continued to feed them. After a short while, they recovered. The three beady-eyed sisters were completely stunned.

"Ugh~~~~~~~~~~~~~~!!!"

"Wow, Lord Bai Ze's medicine is amazing!"

"That's amazing!"

The three beady-eyed sisters happily jumped around Bai Ze, who also looked at them with a smile. Bai Ze took out the World Sphere he had brought and gave it to the three sisters, asking them to feed it to the remaining poisoned team members.

Seeing that both medicines brought by Hakutaku were usable, Shinobu stood up with peace of mind and silently walked out of the room. After watching Shinobu leave the room, Hakutaku left a bunch of life potions for the three sisters, instructing them to give a bottle to each of the team members who had been detoxified to help them recover from their injuries.

Bai Ze then left the room to look for Shinobu Kocho. He finally found Shinobu in a room and looked up to see the memorial tablet of Shinobu's older sister, Kanae Kocho.

Bai Ze sighed, silently walked to Shinobu Kocho's side, lit an incense stick for Kanae, and sat with Shinobu Kocho without saying a word.

Shinobu Kocho fought back tears, thinking of her older sister who had died in her arms from severe injuries. If only she had had Hakutaku's medicine back then, her sister wouldn't have died.

Bai Ze couldn't hold back any longer and said to Kocho Shinobu:

"If you want to avenge your sister, then participate in the special training I've prepared for you. Once you've mastered those two techniques, perhaps even the ghost that killed your sister won't be a match for you!"

Shinobu turned to look at Bai Ze, pursed her lips and said nothing, but looked at Bai Ze with eyes full of tears, making Bai Ze feel uneasy.

At this moment, Shinobu Kocho spoke:

"The murderer who killed my sister is very likely an Upper Moon demon. My sister told me about his characteristics before she died. I want to find him and kill him with my own hands to avenge my sister."

Bai Ze patted his chest and said:

"Alright, then I'll be your strong support! Don't worry, that little cricket is no problem!"

Shinobu Kocho smiled again, her eyes narrowed, her fair and delicate hand covering her mouth as she smiled sweetly, leaving Bai Ze stunned once more.

Taking advantage of the conversation, Bai Ze chatted with Shinobu Kocho for a long time, talking about the characteristics of the different Nichirin Blades in the hands of the Pillars, and how the blades of the Nichirin Blades were made of materials that absorb sunlight, namely "Scarlet Sand Iron" and "Scarlet Ore".

At this moment, Shinobu Kocho asked Hakutaku why the sword in Hakutaku's hand, which was not a weapon forged by the Demon Slayer Corps' swordsmith, could have the same effect as the Nichirin Blade.

Shinobu's question stumped Hakutaku, who was stunned, thinking:

"Yeah! I only cared about the rarity, artifact, and epic rank of the weapons, and I didn't pay attention to why the weapons could damage demons. If I could figure out the reason, wouldn't I be able to give the Demon Slayer Corps some benefits?"

Bai Ze pondered carefully what made his weapon unique, what characteristics caused it to deal special damage to demons, and suddenly...

"Oh right! How come I didn't think of that!"

Hakutaku suddenly shouted excitedly, startling Shinobu Kocho. Shinobu looked at the excited Hakutaku and asked:

"Oh dear, what could be so exciting that Lord Bai Ze would shout like that in front of a lady, completely disregarding etiquette? I'm truly puzzled~"

Like Doraemon, Bai Ze suddenly pulled out several small red crystals, showed them to Shinobu Kocho, and said:

"This crystal is one of the sources of the special effects my weapon can have on demons. Its red color and inherent fire attribute should have the same characteristics as the sunlight absorption of the 'Crimson Sand Iron' and 'Crimson Ore' required for your Nichirin Blade."

I don't know how much Gorilla Crimson Ore your Demon Slayer Corps has, but judging from the fact that only Pillar-level swordsmen with Breathing Techniques can unleash the full special effects of the Nichirin Blade, it would be difficult for ordinary members to inflict any damage on demons.

I have a lot of these elemental crystals here. If I could use them to forge your Demon Slayer Corps' swords, wouldn't all the members' swords be able to inflict damage on demons like mine?

As Bai Ze spoke, he placed the small red crystal he was holding on the tatami mat, and then, like Doraemon, he took out several small crystals of different colors—black, blue, and white—and placed a little of each on the tatami mat.

Then, Bai Ze explained the properties of the four different colored crystals to Shinobu Kocho. It was the first time Shinobu had seen such a magical thing. As she listened to Bai Ze's explanation, she couldn't help but pick up a small red crystal. A slight burning heat emanated from the crystal and spread outwards.

Shinobu Kocho held all four types of crystals in her hands, feeling them. The slight chill of the blue crystal, the dazzling light of the white crystal, and the profound depth of the black crystal all made Shinobu a little dizzy. Shinobu gently patted her forehead and said:

"Lord Bai Ze has really given me a difficult problem. This precious material should be given to the head of the family, not to me."

"Lord Bai Ze, would you be willing to present these materials to the Clan Head with me, explaining the characteristics of these crystals? Then we can send them to the Sword Forging Village. If they truly possess the same properties as the Crimson Ape Ore, it would be a great boost to the combat power of even ordinary team members."

Bai Ze readily agreed, and then Bai Ze and Kocho Shinobu packed up all the small crystals and went to the family head's residence to request an audience with the family head.

Since the curse on Ubuyashiki Kagaya's body disappeared and he regained his sight, Kagaya has always liked to sunbathe in the courtyard during the day, and today was no exception. At this moment, a servant came to report that Kocho Shinobu and Hakutaku requested an audience, saying that they had important matters to report.

Kagaya Ubuyashiki told the two to go to the reception room, saying he would come later. Shinobu Kocho and Hakutaku were led to the reception room by the guards. One of the Ubuyashiki twins served them tea, and Hakutaku and Shinobu Kocho drank the tea while waiting for Kagaya Ubuyashiki to arrive.

"Sorry to have kept you two waiting!"

Kagaya Ubuyashiki led the twins into the reception room from one side. Shiro and Shinobu also bowed to Kagaya. After Kagaya Ubuyashiki sat down, he asked Shiro and Shinobu what business they had come for.

Bai Ze told Ubuyashiki Kagaya that he had talked about weapons with Kocho Shinobu earlier that day, and that Bai Ze had mentioned the characteristics of his own weapon, including special small crystals. Then, Bai Ze placed the four kinds of small crystals that he had packed earlier on the tatami mat in front of him.

Kagaya Ubuyashiki was also stunned by what he heard. He picked up the small crystal, examined it, and said with a smile:

"Lord Hakutaku is truly full of surprises. This is yet another precious resource that can greatly improve the survival rate of the Demon Slayer Corps members. We would like to thank Lord Hakutaku once again for his assistance to the Demon Slayer Corps. Ubuyashiki is extremely grateful."

Bai Ze smiled and shook his head, saying:

"As long as it can be used to kill demons, that's fine. I don't know yet if these crystals can be incorporated into the sword. If they can, I will provide a batch to the Demon Slayer Corps, and then the new swords made will be able to be used by the team members."

Kagaya Ubuyashiki thought for a moment and said:

“Perfect timing. A swordsmith will be delivering a sword to Tanjiro in a few days. We can give him these crystals so he can take them back to the sword-making village and try fusing the new materials. If they work, we can have Kasugai Crow send us a message.”

After listening to Kagaya Ubuyashiki's words, Bai Ze nodded and continued:

"That's good. This way, we can find out whether the new weapons can be distributed just as the team members finish their special training. The timing is perfect."

Shinobu Kocho sat beside Hakutaku, watching the man who had brought a different path to the Demon Slayer Corps, and listening to Hakutaku and the head of the clan discuss the future of the Demon Slayer Corps. Shinobu looked up at Hakutaku's white hair and face, and for the first time, she had a thought in her heart other than avenging her sister.

After discussing the crystal matter, Hakutaku and Shinobu Kocho bid farewell to Kagaya Ubuyashiki and left their residence. On their way back to the Butterfly Mansion, Shinobu Kocho, looking at the leisurely Hakutaku, suddenly said:

"Lord Hakutaku is truly a person who works hard for the Demon Slayer Corps!"

Shinobu's voice was a little soft, but Hakutaku overheard a portion of it and turned to Shinobu, saying:

"Huh? What did Shinobu Kocho say?"

Shinobu Kocho smiled slightly but didn't answer, fluttering past Hakutaku like a butterfly.

Bai Ze, inhaling the unique floral scent emanating from Shinobu Kocho, chuckled and followed her towards the Butterfly Mansion. In the distance, the playful laughter of the three sisters—Momo and the Bean-Eyed Sisters—accompanied their light footsteps...

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