I will attack as a player!

Chapter 19 The Principle of Muzan's Control

It was another morning. After having breakfast at the Butterfly House, Chu Wuji looked at Shinobu Kocho, who was wearing a white coat again and walking towards the laboratory, and called out to her.

"Miss Butterfly, are you still researching wisteria flower toxins?"

"Hmm." Shinobu Kocho turned her head: "Although the poison is already quite potent for some ordinary demons, it can only cause limited damage to Lower Moon demons, let alone Upper Moon demons."

"I need to work even harder."

Chu Wuji neither agreed nor disagreed with this, but thought for a moment and said, "Actually, we can try to treat Miss Butterfly's poison by going beyond pharmacology."

"?" Butterfly chuckled and tilted her head, somewhat puzzled.

"The reason why the toxin is ineffective against the Twelve Demon Moons is because their vigorous regenerative ability can generate antibodies in a short time, right?" Seeing Shinobu Kocho nod, Chu Wuji continued, "Then we can think about it from another angle. If it's not medicine, then even demons can't generate antibodies, right?"

"Why don't we try making something like a thin needle from the scarlet iron sand that demons fear, and inject it into the demon's body along with the medicine?"

After imagining what Chu Wuji said, Shinobu Kocho shivered slightly, but then she was puzzled: "Then these iron needles must be extremely fine and short. Even the craftsmen in the swordsmith village couldn't make such needles, let alone mix them with a lot of poison."

"It's very simple. I don't know if Miss Butterfly has ever eaten cotton candy." Chu Wuji gestured roughly: "We can pour molten metal into a similar machine, and mass-produce these fine filaments by high-speed centrifugation. After cutting, they become the metal fibers we need."

Shinobu Kocho's eyes lit up. She pulled out a notebook from her chest, quickly jotted down some notes, and then bowed to Chu Wuji: "Thank you for the suggestion, Mr. Chu. I will give it a try!"

Having said that, although Shinobu Kocho really wanted to leave and try it out right now, she still asked Chu Wuji, "Speaking of which, Mr. Chu, you suddenly brought up the matter of demons, there must be other things to discuss, right?"

"That's right." Chu Wuji nodded. "I'm a little curious. Do you have any clue as to why Tanjiro became that kind of special demon?"

When this topic was brought up, even Shinobu Kocho's smile gradually disappeared, replaced by a hint of worry: "We have absolutely no clue. Whether it's Tanjiro Kamado's blood sample or his body tissue, we've detected some differences from ordinary demons, but we simply can't find the source of this change."

Chu Wuji had already guessed the answer.

Indeed, just like in the original story, without Tamayo, a top-tier savior, providing hundreds of years of research material, it would have been difficult for the Demon Slayer Corps to create some effective medicines.

Should we still go and find Tamayo?

After thinking for a moment, Chu Wuji finally spoke: "Could you please provide some material about ghosts so I can study them? I mean complete ghosts."

Shinobu Kocho looked somewhat troubled: "Yes, we have commissioned the Pillars to capture demons for research or to select swordsmen over the years. But because Muzan can see through the demons' eyes, the captured demons are kept in places far away from the Butterfly Mansion."

"We can provide it if Mr. Chu needs it, but you will need to wait a moment."

"no problem."

----------

The Demon Slayer Corps moved as fast as ever, or perhaps the Demon Slayer Corps' lord wanted to use this opportunity to build a good relationship with Chu Wuji and win him over. A demon with burlap sewn on his head was brought over in the afternoon.

The escort was none other than Tomioka Giyu, whom Chu Wuji was quite familiar with. After delivering the ghost, the man ran off to the next mission location without looking back.

"You bastards, once I escape, I'll tear you to pieces and eat you alive!!"

The demon that was sent was quite powerful; its hands and feet were fixed in place by molten iron that had been poured directly into it, yet it still twitched and kept trying to escape.

The noise annoyed Chu Wuji, so he borrowed a sickle from a member of the Hidden Members and cut the other person's vocal cords, fixing them to his neck to prevent recurrence.

This action made the hidden members' eyebrows twitch.

Ignoring the gazes of the hidden members, Chu Wuji dragged the ghost into the laboratory that the Butterfly House had prepared for him like a dead pig and began to operate it.

He hadn't forgotten his primary objective in the instance.

Chu Wuji had already grasped some of the methods Muzan used to control the demons, and immediately took out the [Authentic Old Jar] and, together with a scalpel, began to cut the demons tied to the table.

As mentioned before, the boost from leveling up is all-encompassing. At this moment, Chu Wuji's hands were even more stable than some instruments. In no time, the ghost's flesh and blood were disassembled like a Gundam being assembled, resembling a blooming flower.

He rinsed the operating table with sterile water and then used tweezers to carefully remove from the flesh a milky white substance with a hint of scarlet, resembling crisscrossing blood vessels.

This is the peripheral nerve trunk of this ghost.

"It really is this." Chu Wuji looked at the nerve slice he had placed under the electron microscope. He saw that the detached neurons still maintained terrifying activity and had undergone certain morphological changes—a group of relatively normal neurons were entangled with a group of highly aggressive neurons.

This mutation wasn't limited to a single location; it permeated the entire nervous system of the ghost, and even brain samples taken from its brain showed the same condition.

However, this phenomenon did not occur in the nerve specimen at the tip of the little finger provided by Tanjiro.

It's not hard to guess that these entangled and even fused neurons are Muzan's means of controlling his demon subordinates.

Muzan used his cancerous blood to create a new nervous system within the demon's body, monitoring whether the demon would reveal his information. When exposed, he would take over control of the cells, creating the giant hand that destroyed the demon's body and repairing its tissues.

"That makes things easier."

Chu Wuji revealed a gentle smile, tore off the burlap sewn onto the ghost's face, opened a bag of blood plasma, and poured it into the other's mouth.

"Don't die yet, we'll need you later."

But it was clear that the ghost could no longer hear Chu Wuji's voice.

As early as Chu Wuji's dissection without anesthesia, this ghost had already suffered a mental breakdown due to the unbearable pain.

However, that's the good thing about ghosts; even mental breakdowns caused by protein denaturation in the brain can gradually regenerate and recover after ingesting blood.

Before long, the ghost came back to life, but its gaze toward Chu Wuji was now filled with fear.

Chu Wuji ignored the other party and began to record the preparations for the next step.

"To break Muzan's control, we need a differentiation-blocking drug and a targeted elimination drug... Zero, design a drug formula that can be produced in Japan during the Taisho era."