One person: Lu Jin, do I look like your master?

"According to some scattered records and oral traditions from our ancestors... it seems that all the breathing techniques now, including our Purgatory family's Flame Breathing, are not the original prototypes."

They... all seem to have originated from and evolved from a more ancient and powerful 'initial breathing technique'.

This statement was undoubtedly quite novel to the other pillars.

They only knew the lineage of their respective breathing techniques, but never delved into the origins of all breathing techniques.

Upon hearing this, Wang Xuan nodded approvingly, confirming Rengoku Kyojuro's statement.

“That’s right. All the breathing techniques you are practicing now, all these schools, all point to the same breathing technique.”

His voice reached everyone's ears clearly, as if unveiling a thin veil covering the truth of history.

"That original breathing technique was called—Sun Breathing."

"Breath of the Sun..."

The pillars murmured the name, which was full of glory and power. Just hearing the name caused an indescribable, primal tremor in their breathing techniques.

Wang Xuan continued recounting that long-forgotten history:

"And the person who created this Breath of the Sun is named—Yoichi Tsugikuni."

"Tsugikoku Yoriichi?"

This name is quite unfamiliar to most of the Pillars, except for Kagaya Ubuyashiki.

Hundreds of years have passed, and the Demon Slayer Corps has gone through countless twists and turns. Many detailed historical records have long been lost, especially those concerning specific individuals. Unless passed down through family tradition or with special attention, these records are difficult to preserve.

Even Kagaya Ubuyashiki, as the head of the Demon Slayer Corps, knew far more than the ordinary members.

He knew that Yoriichi Tsugikuni's name was related to the origin of the Breathing Technique, that he was a brilliant swordsman from hundreds of years ago, but he didn't know the specific details, such as why he created the Breath of the Sun, or what exactly happened between him and Muzan.

As for his final fate, the family records are incomplete and vague.

All he knew was that he was a legendary figure who had once driven Muzan Kibutsuji to the brink of defeat.

Looking at the blank or inquisitive expressions on everyone's faces, Wang Xuan knew that this part of history had indeed been largely buried by time. He calmly continued:

"Yoriichi Tsugikuni is a true prodigy, born with extraordinary talent and a 'world-seeing' perspective."

The Breathing of the Sun he created is a technique that mimics the core power of the sun. Its essence is extremely yang and strong, possessing unparalleled restraining effects against demons. Theoretically, it is the only power besides the sun that can truly and completely destroy Muzan Kibutsuji.

The pillars held their breath, listening intently to this unheard-of secret.

Sun Breathing... Imitating the sun? Completely annihilating Muzan? These thoughts exploded in their minds like thunderclaps.

Wang Xuan changed the subject, his tone carrying a hint of detachment as if he were observing the rise and fall of history.

"The Breath of the Sun places extremely high demands on the user's talent, physique, and even temperament, almost to the point of being demanding."

Yoriichi Tsugikuni attempted to pass it on to others, but unfortunately, no one was able to fully grasp its essence.

To combat the demons, those exceptionally talented learners had to simplify and transform the Sun Breathing technique according to their own characteristics, thus... giving rise to the various basic breathing styles you are now practicing.

The truth slowly unfolded before everyone's eyes like a scroll. It turned out that the breathing techniques they were so proud of and relied on for survival were actually just a side branch of the supreme "Sun Breathing," a product of compromise!

Just how incredible was the power and realm of the progenitor named Yoriichi Tsugikuni?

A feeling of shock, awe, and deep regret for the lost heritage permeated the hearts of all the pillars.

For the first time, they realized with such clarity that the power they wielded concealed a history that was both magnificent and filled with regret.