Both start in hell: but their talents are multiplied a hundredfold.

His Armament Haki is very strong and comprehensive.

Those who focus on training in Armament Haki are not only incredibly durable, but also deal high damage, making their attacks extremely painful.

The advanced stage of Armament Haki, Ryuo, can also perform ranged attacks and disintegrate enemies or weapons from within.

In just seven days, Shen Jue transformed the unique Armament Haki training method from the One Piece world into a special breathing technique from Demon Slayer.

This is the result of 600 times the superposition of talent and ability, plus the accumulated cultivation experience of many Shen Jue and others.

As more and more Shen Jue accumulates, this terrifying talent will only grow stronger.

"Attack with all your might." Shen Jue smiled, his hands covered with a black membrane formed by Armament Haki.

Directly opposite Shen Jue, Shinobu Kocho, dressed in the Demon Slayer Corps uniform and holding a specially made rapier, silently followed Shen Jue's instructions.

Shinobu Kocho has seen geniuses before, but she has never seen a genius as terrifying as Shen Jue.

Just as Yan Zhu said, could Shen Jue really be a god descended from heaven?

"Insect Breathing, Bee Fang Dance, True Trail".

Shinobu Kocho vanished! When she reappeared, the specially made rapier in her hand was already thrusting towards Shen Jue's right hand!

The power of this strike was enough to pierce the skulls of the most terrifying man-eating demons among the Twelve Demon Moons!

"Buzz!"

A sickening sound came from where Shen Jue's right hand clashed with Shinobu Kocho's rapier.

Shinobu's rapier didn't even touch Shen Jue's Armament Haki covering him—no, it should be the black membrane formed by his Power Breathing!

They were blocked by the imposing aura surrounding the black membrane! They couldn't advance an inch!

Butterfly Shinobu's purple eyes widened as she drew her sword and retreated, feeling numb to Shen Jue's reaction.

"Now that we've mastered a powerful breathing technique, the next step is to figure out how to cultivate our physical body."

Shen Jue rested her chin on her fingers and said gently, "Master Shinobu Kocho, thank you for your help."

Shinobu Kocho nodded silently, feeling Shen Jue's unparalleled power. She seemed to see hope for revenge against the cannibals.

For the next month, Shen Jue and Shinobu Kocho stayed in the Butterfly House and rarely went out.

The operation of the Butterfly Mansion was handed over to Shinobu Kocho's stepson, Kanao Tsuyuri.

After Shen Jue compiled the training methods of Breath of Power into a book and handed it to the Stone Pillar who came to the Butterfly Mansion.

Shen Jue's information has been classified as one of the most closely guarded secrets by the Ghost Slayer Corps.

Even the wanted notice for Shen Jue and the bounty on his head in the underworld have been perfectly resolved by the Ubuyashiki family through their influence.

Although Shen Jue didn't care about the so-called wanted notice.

Breath of Power is a breathing technique that specializes in "power".

The core concept is "overcoming all methods with force," transforming human potential into pure destructive power through extreme muscle control and breathing rhythm.

"Entanglement," "hardening," and "release" are the three ways to use the Breathing Technique of Power.

By honing one's physique and willpower to the extreme, one can develop Armament Haki, forging the human body to the point where even firearms cannot harm it.

This is what makes the Breathing Technique so terrifying.

The most crucial point is that the breathing technique of strength is universal.

Users of the five basic breathing techniques can all switch to the breathing technique of power.

Unfortunately, there are certain barriers to mastering the Breath of Power technique.

A strong physique is the key to unlocking the Breathing Power technique.

Humans in the Demon Slayer world don't possess the terrifyingly abnormal vitality of humans in the One Piece world.

There is no such unreasonable thing as the Supreme Great Bandage.

Shen Jue asked Shinobu Kocho to be his trainer, naturally in order to solve this problem.

Shinobu Kocho possesses extensive knowledge of medicine and toxicology, and also has access to a readily available laboratory.

This is much better than Shen Jue starting from scratch.

Shen Jue was confident that he could develop drugs to help humans enhance their physique, naturally because of one of the abilities he gained from the Resident Evil arc.

In the Resident Evil universe, Shen Jue was infected with the T-virus. Then, due to the superposition of Shen Jue's many talents and abilities, the T-virus underwent several co-evolutions within Shen Jue's body.

Shen Jue's consciousness was flawed during the Resident Evil arc, which prevented him from accurately developing the abilities brought about by the T-virus, which had evolved several times.

In the world of Demon Slayer, the concept of demons originated from a specific medical accident.

Therefore, Shen Jue from Demon Slayer was able to use the T-virus from Resident Evil, which had undergone several co-evolutions.

"Wisteria, this poisonous flower that can cause great harm to ordinary ghosts, actually has such a beautiful side." Shen Jue put a wisteria flower in his mouth and carefully tasted its poison and fragrance.

"Shen Jue, now it seems you really aren't human anymore." Shinobu Kocho leaned against Shen Jue, watching him pluck one wisteria flower after another and put them in his mouth.

"I am human, but I'm a little different from you," Shen Jue replied casually.

The mutated T-virus, born from the co-evolution within Shen Jue's body during the Resident Evil arc, can transform Shen Jue's body into a large-scale viral and biological culture dish.

This body culture dish can extract the effective components of other organisms to specifically produce the drugs or poisons that Shen Jue needs.

During the long experimental process, Shen Jue tried many drugs that could enhance human physique without causing a lot of harm.

Finally, on Shinobu's advice, Shen Jue, who used wisteria flowers, discovered the optimal solution.

The wisteria flower, feared by ghosts, can be specially prepared in a body culture dish to generate a special medicine that greatly enhances the human physique while containing trace amounts of toxins.

Shen Jue named this drug Super Swordsman Serum.

If Death God Shen Jue were here, this guy would definitely burst out laughing.

Shen Jue is clearly imitating the Super Soldier Serum from Marvel.

In fact, the Super Swordsman Serum does have almost the same effect as the Super Soldier Serum.

Super Swordsman Serum can amplify the user's obsession.

Shen Jue's fingers dripped drop after drop of Super Swordsman Serum from his fingertips.

Shinobu Kocho used a special preservation device to receive the Super Swordsman Serum.

Apart from Shen Jue, no other human has yet used the Super Swordsman Serum.

Shen Jue noticed that Shinobu's eyes were darting around, and that her emotional fluctuations were so great that Shen Jue could easily see it.

Shinobu Kocho has a large amount of wisteria flower toxin stored in her body all year round, turning her bodily fluids and cells into a highly toxic substance against demons.

She could easily be described as a walking wisteria flower.

"Shinobu Kocho, my master," Shen Jue said softly. He grasped Shinobu Kocho's cold hand and used his own warmth to help her relax.

"Just as you guessed, I can convert the toxins in the wisteria flowers into super swordsman serum through my own body."

"If we come into close contact, I can also convert the wisteria flower toxin in your body."

"This is much faster than slowly using the Super Swordsman Serum to enhance one's physique step by step."

After receiving an affirmative answer, Shinobu nodded slightly, her purple eyes fixed on Shen Jue, and then remained silent.

(Several thousand words are omitted below.)