The Heavenly System of Pillar Destroyer Blade

One day, Yan Sheng led his troops on an expedition. Just as the troops were setting up camp in the forest, they were unexpectedly attacked by evil spirits. In the end, the entire army was wiped out except for Iwakatsu himself. Just when he was about to be killed by the ghost, something Iwakatsu never imagined happened - the grown-up Yuiichi suddenly appeared to save him and killed the ghost easily.

Iwakatsu, who was shocked by Enichi's strength and sat there blankly, received an extremely calm apology from his younger brother. Seeing his younger brother who had reached the advanced level of strength, Yan Sheng's feelings of disgust and jealousy towards his younger brother were all rekindled again.

Later, in order to obtain the kind of power possessed by Yui Yi, Iwakatsu chose to abandon his family, wife and children, and became a ghost hunter like Yui Yi. Together with his brother, he participated in the Demon Slayer Team's hunt for the ancestor of ghosts. —The encirclement and suppression of Tsuji Muzan by Ghost Dance.

Later, when Enichi taught the breathing technique to the remaining members of the Demon Slayer Corps, Iwakatsu was unable to master the Breath of the Sun because he could not withstand the power of the sun, so he had to use the deteriorated Breath of the Moon. Although he was very reluctant, as he continued to improve his ability to use breathing techniques, Yan Sheng finally awakened to the same pattern as Yuanyi. With his strength greatly increased, he began to think about whether he could surpass him if he continued to train.

But as time went by, Yan Sheng suddenly discovered that his friends who had awakened their stripes were dying one after another, and finally realized the fact that they would not survive until the age of 25 after awakening their stripes. He is about to turn 25, and Yan Sheng realizes that he no longer has time to hone his sword skills, and feels deeply confused about this.

Soon after, Yan Sheng directly encountered Wu Mei during a pursuit of Wu Mei. During the face-to-face confrontation with Wu Mei, Yan Sheng saw through Wu Mei's worries. Faced with Muzan's proposal to become a ghost in exchange for infinite years to hone his sword skills, Yan Sheng was influenced by the unforgettable jealousy towards his younger brother. In the end, Iwakatsu failed to withstand his temptation, drank his blood, and spent three whole Sun transformed into the sword ghost and became the first string - Black Death Mou...

Later, the successor family declined after he turned into a ghost. His descendants were forced to hide in the mountains to avoid being hunted by others, and changed their surname to Tokitoru, making a living from logging for generations.

On a red moon night 60 years after turning into a ghost, Black Death Mo returned to his hometown after waiting for all the striped swordsmen to die. While passing a seven-story pagoda in the countryside, he witnessed something unbelievable.

What appeared in front of him was his younger brother, Enichi Tsukuni, who was over 80 years old and had turned into a gray-haired old man. Heishimou knew that all striped swordsmen would die before the age of 25, so he felt incredible about the gray-haired Yuanyi in front of him. Immediately, Hei Shimo asked Yuanyi why he was still alive, but Yuanyi, who seemed to be very old, lamented in turn: "How sad, brother..."

Hei Shimo did not feel the slightest anger at the mercy from his younger brother. Instead, he felt sad for the first time because of the tears his younger brother shed. However, although Hei Shimo was a little confused by his unexpected wavering, in order to cut off the bad fate of the past, Hei Shimo immediately drew his sword and prepared to fight Yuanyi. However, Yuanyi pulled out the Sun Blade first...

In the blink of an eye, Hei Shimou had no time to react before he was struck in the neck by Yuan Yi's knife. When he came back to his senses, Hei Shimou suddenly realized that the power and speed of Yuanyi's sword were almost the same as those in his heyday! Immediately, while feeling deep fear, the resentment and jealousy towards his younger brother in Hei Shimo's heart burned brightly again. Heishimou, whose thoughts were influenced by the killing intention, although he expected that Yuanyi's next blow would cut off his head, he still had to be prepared to receive Yuanyi's next blow. However, at this moment, he found that Yuanyi was already standing still. It turned out that Yuanyi had already run out of energy and stopped breathing long after he swung the knife.

Yuan Yi's death made Hei Shimo realize that he would never have a chance to defeat Yuan Yi. Feelings of hatred and humiliation surged into his heart, and then he split Yuanyi's body into two pieces with a knife to vent his anger. But this knife not only cut off Yuanyi's body, but also cut off a bag that Yuanyi had been carrying. And what emerged from the broken brocade bag was exactly what he had split into two pieces - the flute he gave to Yuanyi when he was a child...

At this moment, Hei Shimo discovered that his younger brother had actually cherished the only thing he had given him in the past decades...

Later, Hei Shimo gradually remembered his original friendship with Yuanyi. Although he kept claiming that he hated Yuanyi very much, for the first time, he shed tears for the brother who had hated him all his life. At the same time, Hei Shimo also discovered that what he hated most was Yuanyi, but the most unforgettable thing in his memory was also Yuanyi. Although after he turned into a ghost, his memory continued to blur and fade, and he could barely remember the appearance of his family members, but only Yuanyi's appearance remained as clear as before.

In the end, Hei Shimo admitted that he originally chose to be reduced to this ugly state in order to defeat Yuanyi, but Yuanyi's death meant that he would never have the chance to surpass Yuanyi. Therefore, Hei Shimo made an oath: He will never lose to anyone again!

After Yuan Yi's death, in order to eradicate the Sun's Breathing Technique, Hei Shimo assisted Wu Mei to kill all the swordsmen who knew the Sun's Breathing Technique except Yuan Yi, completely cutting off its inheritance.

Looking at his body that was beginning to collapse, Hei Shimo did not feel any fear of death in his heart, but instead felt a little emotional.

"Yuanyi, you once said that those who pursue the ultimate will eventually reach the same end point, but I failed to do it. In the end, I did not see the world you mentioned. After your death, I and that Sir, you have obviously killed all the swordsmen who know the breath of the sun. Why? Why can your breathing be delayed till now? Why can't I leave anything behind? Why can't I become anyone? , why are you and I so different."

"Why was I born? Can you answer me? Yuanyi"

He kept asking in his mind. When Hei Shimo's body completely turned into dust and merged into the world, a flute that had been chopped into two sections leaked out of the feather fabric he left behind. , this flute may have been around for some time, so it looks very ancient on the surface.

"Yuanyi, I just want to be you."