Demon Slayer: The Great Swordsman's System, Disciple of Yoriichi

"Aaaargh!"

Clutching his chest, Michikatsu Tsugikuni roared. Blue veins bulged on his forehead, face, and body, twitching as if worms were crawling beneath his skin. His body curled into a ball, sweat drenching the rooftop beneath him.

The more powerful the human, the longer it takes to transform into a demon. Muzan casually shattered the roof beneath Michikatsu with a single blow, seemingly very interested in his transformation. I wonder how long it will take for you.

After settling Michikatsu in the ruined building, Muzan leaped down to the street below. As the humans on the ground stared in panic, wondering why someone had just jumped from the sky, Muzan made his move.

Swish, swish, swish!

Moving at a speed invisible to the naked eye, he slashed the necks of several humans, then held up one hand.

"You all have five seconds to run."

With that, he folded his thumb into his palm.

"Four." The humans with slashed necks collapsed, their bodies trembling uncontrollably.

"Three." Their fingernails began to grow, their pupils turning crimson.

"Two." The trembling stopped. Sharp fangs extended from their mouths, drool trickling from their lips.

"One." They stood up again, their eyes fixed on the people around them.

"Zero."

With a roar, the newly transformed demons began to attack, tearing into the surrounding humans. At that moment, the people who were still confused finally reacted, screaming and crying as they fled towards the edge of town.

Raising a finger to his lips, Muzan made a "shushing" gesture. "Let this town be a celebratory gift for the demon about to be born."

Watching everything unfold, Si Shu's hand gripping his sword had turned white. The reason he didn't act wasn't out of fear of Muzan or anything else. He was waiting. Waiting for a chance to kill the demonized Michikatsu Tsugikuni.

Certainly, if he acted now, he could save a few, a dozen, or even dozens of people. But what of it? In the centuries to come, thousands upon thousands would die at the hands of demons. If he could eliminate Kokushibo here and now, that would be a true solution to a hidden threat.

Gritting his teeth, Si Shu chose to endure.

After killing a few people and creating some new demons, Muzan returned. It was clear he was looking forward to Michikatsu's demonic form. So much so that he was willing to guard him personally, staying by his side the entire time.

Soon, three days passed.

As night fell, Muzan, who was sitting on the roof, suddenly stood up. "A demon that took three days to fully transform... how exciting."

The moment he finished speaking, a terrifying aura erupted into the sky. It was cold, deathly, horrifying, chaotic.

Shing.

With the faint sound of a slash, a dark figure slowly walked out of the building. The moment it emerged, fine cracks appeared on the walls.

Crack... crackle...

The tall building was sliced into countless equal-sized pieces.

In the moonlight, the fully demonized Michikatsu Tsugikuni's appearance was revealed. He still had his black hair in a high ponytail, and the marks on his left forehead and right jaw remained. The only difference was the six eyes on his face! His sclera were crimson red, with yellow irises marked by fine lines.

Looking at the new Michikatsu, Muzan said with a smile, "How does it feel?"

"More powerful than I could have ever imagined. So this is the power of a demon." Clenching his fist, feeling the abundant power within him, Michikatsu's face was filled with ecstasy. He had finally obtained the possibility of surpassing Yoriichi!

"Since you have become a demon, your old name is no longer needed," Muzan said.

Hearing this, Michikatsu fell into deep thought. Having abandoned his identity as Michikatsu Tsugikuni, what should he call himself? He looked at his reflection in a puddle on the ground.

Black hair, bringing eternal night.

A sharp blade in hand, unleashing undying death.

Six red eyes, watching all things in the world.

"I shall be called... Kokushibo."

Muzan stroked his chin, seeming quite pleased. "A fine name. Much better than the 'Breath-Style Hunter' I was thinking of."

Just then, Michikatsu—no, Kokushibo—suddenly turned his head, his gaze fixed on a tall building in the distance.

Not good!

Realizing Kokushibo had detected him, Si Shu immediately leaped from his hiding place and fled. He had planned to attack while the two demons were distracted, but he hadn't expected Kokushibo's senses to be so powerful. Facing both Kokushibo and Muzan at the same time, he had no confidence in victory.

"Oh? There's still someone alive," Muzan said, a little surprised. He bent his knees, preparing to give chase, but Kokushibo stepped in front of him.

"He is merely a small insect." With that, Kokushibo drew his sword. But now, the Nichirin Blade no longer radiated heat. As the former blade of Michikatsu Tsugikuni, it was now dead.

Noticing this, Kokushibo showed no disappointment. As a demon, how could he possibly use a blade meant for slaying them? Without hesitation, he snapped the Nichirin Blade in two. Then, he reached behind his back and tore out his own spine!

Under a demon's powerful healing ability, Kokushibo was completely unaffected. Not only that, but the spine in his hand began to transform under his Blood Demon Art. Soon, a simple blade made of flesh and bone appeared in his hand. "This will have to do for now."

Sensing Kokushibo's intent, Muzan said, "If you wish, then he is all yours."

"Of course. This is a loose end from my time as a human."

Leaping into the air, Kokushibo chased after Si Shu.

"Moon Breathing, Second Form: Pearl Flowers Moongazing!"

Spinning his body in mid-air, he instantly unleashed two crescent-shaped slashes. The sound of tearing wind echoed as they shot towards Si Shu's back. Sensing the disturbance behind him, Si Shu knew Kokushibo's attack had arrived.

"Sun Breathing, Third Form: Setting Sun Transformation!"

With a horizontal slash, a deep red flame attack flew out. The two different attacks collided, creating a massive explosion. The shockwave sent both Si Shu and Kokushibo flying in different directions.

Crashing into a room and rolling a few times, Si Shu stood up, covered in dust. It seemed he was safe for now.

But just then, a roar suddenly came from the darkness. A demon emerged from a corner. Not only that, but a dozen more demons came out from the surrounding houses.

At that moment, Si Shu felt his eyelid twitch uncontrollably.

It seems... I've been surrounded.

-------

Enjoying the story? Support the author and get access to early chapters by joining my Patreon!

Find me at My : pat*eon*com/RuneA

I, Herta's Fiancé, the Universe's Number One Male Fist (111 Chapter)

Zenless Zone Zero: I'm a Succubus in Sixth Street (220 Chapter)

Reborn in Type-Moon, My Sister is Aoko Aozaki (220 Chapter)

MyGO!! A Story Voiced by Me (90 Chapter)

BLEACH: Blade of Purification (100 Chapter)

Konoha: Starting the Game as Yoriichi (260 Chapter)

My Real Job is Spying on Konoha, but I'm Also its Hokage (98 Chapter)

The Pinnacle of the Navy! Starting from Being Captured by Garp (100 Chapter)

Watching Yu-Gi-Oh! short videos is making the veteran players lose...(57 Chapter)

Uma Musume : The Trainer Who Just Wants to Live (100 Chapter)

Zenless Zone Zero The Random Kamen Rider (100 Chapter)

Genshin Impact: It All Began With Me Being Stepped On by Arlecchino (70 Chapter)

Naruto: I Can Synthesize Summoning Beasts (40 Chapter)

Demon Slayer: The Great Swordsman's System, Disciple of Yoriichi (61 Chapter)

My Wife is a General, but I'm an Emanator of Abundance! (60 Chapter)

If there's a particular novel you're enjoying on Patron, please give it a 'like' so I know to focus on it.