Facts have proved that it is not only a fire that can dye the sky red at night, but also the aftermath of a person practicing sword!

On the open space in front of the stove house's charcoal-burning kiln, four or five meters long red flame waves swept through the darkness around them. After extinguishing, they pulled out long dragon-like red fog clouds in the air, hiding the sword-wielding person himself.

In addition to the trajectory of the flame erupting, even the Butterfly Ninja cannot find any specific location of Xianyiro at the moment!

Only when she occasionally enters a brief state of transparency can she slow down Senichiro's movements for a moment.

But even at that speed, it is definitely not something that a swordsman below the pillar can handle.

and……

Butterfly Nin thought a little lost.

The breathing of the day was so violent that it was probably only Purgatory Hoshiro and Iwatsuki could try to practice.

For others, their bodies are not strong enough. If you use Rikhu at this frequency at Shinichiro, you will sooner or later be the same as Tanjuro before.

It can be imagined that even the Butterfly Ninja can't see Senichiro's movements clearly, and except for Tanjuro, the Saucemen family can only treat everything in front of them as a fireworks performance.

Moreover, because the sound of the Sun Breathing Sword is huge and the sound is endless, they can't concentrate on doing other things, so they can only wait for each other to finish.

But who knows that after seeing this, a few hours passed.

They saw with their own eyes that the "fireworks" were blooming faster and faster, and the range of the flame waves also expanded from one or two meters at the beginning to the current level.

But the most obvious change is the temperature in the field.

Compared to a few hours ago when Yeniichiro started, the stove door family had retreated more than ten meters away to avoid the increasingly scorching air.

All of this shows that Xianichiro's Rikkha sword shape is constantly improving and strengthening.

"Is this Brother Xianyiro's sword technique?"

Takeozuo of the stove gate covered his swollen face that was pinched by someone, and his eyes that were reddened by the flames were filled with admiration.

"It's so awesome! It's so awesome!"

Then he suddenly changed his voice, "But why is he so powerful but not Zhu? Instead, he looks like he is so powerful, sister..."

Tanjiro covered his younger brother's mouth and smiled embarrassedly at Butterfly, probably saying that "Children don't have a memory, please be sure not to have a common sense of knowledge with him."

However, Butterfly Nest would not care about a child's intentional or unintentional verbal revenge at this time.

The attack power displayed by Shinichiro at this time finally gave her a little confidence to defeat Muzan Kimuzan.

"Mr. Tanjuro."

Butterfly Nin turned his head to look at Tanjuro with a hopeful expression, and the latter's eyes were moving quickly. This also proved that he was the only person present who could see Xianyiro's position.

"How is Xianichiro's breathing in Hinata compared to the demonstrations of Senior Yuanichi in your memory?"

"Well...what should I say this?"

Tanjuro pondered for a while, "I know nothing about swordsmanship, so I may not be able to say anything useful..."

“Please be sure to speak freely.

"Butterfly Nin's expression was sincere and serious. She must know how far apart Shinichiro was and the initial swordsman who once severely damaged Muzan. "Only you are qualified to make an evaluation here."

"You are too polite. If you don't mind, then I'll say it."

Tanjuro paused, "Xianyiro's movements are very fast, and he can complete all the movements within four seconds, forming an extremely rapid cycle.

"But considering that Mr. Daoyuanyi was demonstrating his actions for his ancestors, I don't know how fast his actions were...

"From the temperature of the knife and the slash, Mr. Yuanyi should be better. I noticed that Mr. Yuanyi's knife is like burning red charcoal, and it is extremely hot when it is unsheathed..."

"It's He Dao..."

Butterfly Ninja immediately reacted.

Tanjuro continued: "But from the perspective of the coverage of the flames, Senichiro's slash is more spectacular and fierce than Mr. Yuanichi. But accordingly, his movements lose the unique rhythm of Mr. Yuanichi's integration with nature, and sacrifice the original fineness and mystery of swordsmanship."

"If Mr. Yuanichi was dancing devoutly... then Xianichiro was more like venting his power."

Butterfly Neng was stunned: "You vent?"

"Yes." Tanjuro nodded, "He was already exhausted by completing those movements at such a fast speed. But for some reason, he was still forcing himself to use the characteristics of Hinata's breathing to overdraw his physical strength."

"Can you say," Butterfly Nin was a little puzzled, "Is Xianichiro just in a bad mood?"

"No, Miss Ninja."

The person who spoke was Tanjiro, "It's not just that simple. Since last night, Shinichiro has been very eager to pursue something.

"I could smell it, and his heart was filled with not anger, but the ubiquitous anxiety and heavyness, as if something was chasing him.

"So he forced himself to achieve something that would make him feel at ease..."

"Fortify yourself for peace of mind."

Butterfly Nin thought for a while, then his face changed drastically, "He, could he be forcibly raising his body temperature and turning on the markings?"

"Stripes?" Tanjiro asked in confusion.

"Mr. Tanjuro, you should have seen markings on Mr. Yuanichi's forehead, which is a crimson birthmark in the shape of a flame."

Butterfly Ninja stared at the field nervously, "Any swordsman who can open the marks will have further improved physical fitness."

Tanjuro suddenly realized it, and then unconsciously touched the red birthmark on his head.

"Then why do you look very worried, Miss Nin?" Tanjiro scratched his head, "Isn't this a good thing to have your body strengthened?"

"No, it's very dangerous to open the marks."

Butterfly explained seriously: "The swordsman must increase his body temperature to more than 39 degrees, his heart rate exceeds 200, and he must be able to maintain this state. Only the swordsman who can survive in this state can open the markings."

The other children did not understand what the concept of thirty-nine degrees was, but Tanjiro, who accompanied his father down the mountain to see a doctor, understood it.

"Yes, but the doctor said that if the body temperature of thirty-nine degrees is not treated, people will die soon."

As he said that, Tanjiro looked at his father, "The time when Dad had the most fever was only about 38 degrees, but the doctor was worried even if he was that way."

"This is the price you have to pay to kill Muzan Kissun."

Butterfly's firmness in his tone made Tanjiro speechless, "The opening of the markings is exchanged for overdrawing life. Once successful, you will not be able to live beyond twenty-five years old."

But what she couldn't understand was why Xianichiro had to do this.

If the devil killing team's pillars are trying hard to turn on the marks, this is understandable.

But anyone familiar with Senichiro in the Demon Slayer team understands one thing--Ashina, who has just been born, has no fundamental hatred with Kimuzan.

Even though Xian Ichiro was almost killed by one of the windings, he never expressed his intention to take revenge on the other party.

From the beginning, Shinichiro targeted ghosts, just to allow Ashina, who had been away from the world for many years, to gain an irreplaceable economic and political status.

Although the Butterfly Ninja and the Demon Killing Team's pillars admire and thank Yan Yiro, and even Mukukawa became close friends with him, what everyone knows is that-

Xianyiro and Kyuro are different.

He lacked the most basic compassion for Ashina and humans outside of the pillars, and he was more cold and practical.

If it weren't for killing Muzan Ki, he would have brought benefits to Ashina, Shinichiro would never have been an enemy of Gui.

Logically speaking, even if such a person aims to kill Muzan Kimuzan, he still has to survive and enjoy the results.

At least as far as Butterfly Ninja understood, Xian Ichiro asked Kyuro to become a teacher, and came into contact with Tokyo's wealthy businessmen, nobles and powerful people, and even gave Aiyama a seat to win over the backbone of society. This shows that he had very long-term plans for Ashina. Killing Muzan Kishi was just to enable these plans to be implemented smoothly.

But now, Xian Yiro is in front of the Demon Slayer Team and begins to think about the first way to overdraw his life—

What happened that made a recognized ambitious man willingly die young.

Butterflies are so worried.

From the bottom of her heart, she didn't want Shinichiro to open the marks. It was not only out of the responsibility of the Demon Slayer, but also out of gratitude to him, so she did not want such a person to die young.

"Mr. Tanjuro, can you guess Shinichiro's current body temperature based on the degree of expansion of muscles and internal organs?"

After hearing Butterfly Ninja talk about the vital signs of people under different body temperatures in detail, Tanjuro nodded, "I'll give it a try."

As he said that, his eyes became deep and distant, blocking all other feelings, so that he could slow down the time in the vision to the point where he could see the inside of Shinichiro's body clearly. From this, it can be seen that Shinichiro's speed was so fast that he could not even grasp it accurately.

"this……"

A minute later, Tanjuro returned to normal, but hesitated when he spoke.

"How is it?" Butterfly Ninja asked.

"I'm afraid, Xian Ichiro's body temperature has been forty degrees, and his heartbeat frequency has long exceeded 220."

"What!" Butterfly Ninja and Tanjiro shouted in unison.

"How is this possible?" Butterfly Nin asked again, "Then are there any crimson markings on his body?"

Tanjiro shook his head.

"His chest has a birthmark in the shape of a sun, but it is not as dark red as Mr. Yuanyi. It should not be the so-called markings."

"That's not?"

Butterfly shook her head in disbelief.

She believed that Tanjuro's observation would never go wrong, so the problem came-
To be continued...