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Chapter 6: Marks, Crimson Blades, and the Transparent World

Under the moonlight, the air in the forest seemed to be gripped by an invisible hand, making the atmosphere heavy and oppressive.

Kyojuro Rengoku held the Nichirin Blade at an angle, its dark red blade emitting a faint hum amidst the surging sword energy.

"Spell Deployment - Destruction Kill - Compass".

Opposite him, Upper Moon Three Akaza was gracefully assuming a fighting stance, the twelve-pointed snowflake array beneath his feet, named "Destruction Kill: Compass," emitting a faint blue light.

Within this realm, any intentional action would be captured by his senses, which were as sharp as a campfire in the night, almost like a prophetic vision.

At that moment, Pei Qi was sitting casually on a section of the train chassis that had been blown off by the previous explosion.

In Akaza's senses, he had no breath wavelength, no boiling blood from battle; everything about Pei Qi seemed to be wrapped in a cold, rule-based shell.

He didn't seem like a human being, but rather a cold sculpture forcibly "placed" in reality. Even though he was right in front of me, he was like a void in the "compass's" detection.

"An eyesore." Akaza felt a surge of disgust. Nevertheless, he remained confident that in the face of absolute power, any strange disguise was meaningless.

In his view, these "ordinary samurai" who relied on armor for defense were nothing more than a pile of moving scrap metal in the face of his destructive power capable of tearing through steel.

His only goal now is the man in front of him, known as "Pillar," a life with a perfect will but about to wither away.

"Kyojuro, since you refuse to become a demon, then I have no choice but to shatter you completely tonight!"

boom!

The ground beneath Akaza's feet instantly collapsed into a huge circular crater.

"Mr. Pei! Please save Mr. Purgatory!"

Tanjiro, leaning on his sword and with tears streaming down his face, shouted. He had tried to help, but the shockwave from their collision sent him flying more than ten meters away.

In his keen sense of smell, Mr. Purgatory's scent was becoming increasingly intense, a sign that life was burning recklessly.

"Tanjiro, calm down. What you are seeing now is not just a clash between swordsmanship and physical combat, but a battle between two different 'ways of being'."

Pei Qi's voice remained clear amidst the chaotic battle winds, each word striking Tanjiro's eardrums with precision.

"Do you know why even when demon slayers go all out, it's difficult for them to kill a monster of this level alone?"

"Because you are trying to use a slow 'physical attack' to fight against a 'regeneration' that is almost contrary to common sense. In my view, this is called an asymmetry of rules."

Pei Qi pointed to the center of the battlefield. At this moment, Rengoku Kyojuro was engaged in a fierce battle with Akaza that was difficult to see with the naked eye. The flames and blue shockwaves destroyed all the trees within a radius of a hundred meters.

"Even if you cut off his arm ten thousand times, as long as the 'source' within him doesn't dry up, he can always maintain that peak state of life," Pei Qi explained.

"To end him, you must raise your 'attack level' to forcibly suppress his regeneration."

Pei Qi's voice remained eerily clear even in the howling wind.

"During my travels, I came across a way in which life's potential is unleashed. When a person's heart rate is forcibly increased to 200 beats per minute and their body temperature soars to over 39 degrees Celsius, the body's 'ultimate potential' undergoes a qualitative change. The patterns that appear in that state are what I call 'stripes'."

Pei Qi's tone deepened: "In this state, by using grip strength beyond the limit to rapidly heat up the weapon, putting it into a 'red-hot' state, the light is not only a physical burning, but also a 'powerful suppression' of the monster's regeneration. That realm is called 'Crimson Blade'."

"Striped... Crimson Blade..." Tanjiro murmured to himself.

Pei Qi suddenly turned to look at Tanjiro, a hint of amusement in his voice: "It is said that hundreds of years ago, a swordsman named Yoriichi Tsugikuni used this method to chase your 'scumbag boss' Muzan like a stray dog. Although the technique has been lost, the requirements for the 'physical condition' remain unchanged."

Pei Qi's words were deliberately spoken to Rengoku Kyojuro. He knew very well that this Flame Pillar did not lack the will to fight; what he lacked was an "armor-piercing attribute" that could pierce through a bowstring and regenerate.

At this moment, Kyojuro Rengoku in the center of the arena was in a state of extreme concentration.

These words were like some kind of revelation that transcended time and space, precisely awakening Rengoku Kyojuro's will, which had already reached a bottleneck.

In the center of the battlefield, Kyojuro Rengoku's breathing rhythm suddenly changed.

The previously continuous attacks instantly ceased; it was no longer the roar of flames sweeping across the forest, but rather a deathly silence before a volcanic eruption.

It is a kind of intense heat that is extremely dormant yet extremely dangerous.

"Hmm...Are you listening to that weirdo's nonsense, Kyojuro?"

Akaza frantically swung his fists, and the shockwaves generated by the Destruction Killing Void Style rained down on Kyojuro, with massive vacuum shockwaves falling like a storm.

"The human body has its limits! This practice of forcibly squeezing out your life force will only extinguish you like a flickering candle! Become a ghost!"

"I have never regretted being born a human being!"

Rengoku Kyojuro suddenly opened his eyes.

At that moment, dark red markings, pulsating like flames, suddenly appeared on the upper left side of his forehead.

His body temperature soared in an instant, and the dry fallen leaves around him spontaneously combusted because of the heat emanating from him.

He gripped the hilt of the knife tightly, his grip strength exceeding human limits, causing the originally crimson blade to burst into a dazzling bright red amidst a creaking sound.

"—The Crimson Blade!"

Tanjiro cried out in surprise. He could sense that the aura emanating from the sword was no longer just simple flames, but a kind of imposing power, like the midday sun, that was impossible to look directly at.

"Flame Breathing - Ultimate Technique - Ninth Form - Purgatory!"

A giant dragon, its red and white plumage gleaming, roared forth. This time, the fire dragon contained not only churning sword energy, but also a terrifying will capable of scorching the soul and even ionizing the air.

Akaza's expression changed drastically. He instinctively raised his fists to take the blow.

*Thud!*

The arm, which was originally as hard as steel and capable of instantly deflecting Nichirin Blades, was easily dissolved the moment it touched the Crimson Blade, as if a hot knife were cutting through butter.

What terrified him most was the burning sensation from the severed wound, as if it were being directly exposed to sunlight. The flesh that would normally regenerate in half a second was now charred and burned.

"This power...this feeling...no! I'll die!"