"Priestess. When I turned you into a demon, I didn't think you'd have such a worthless blood demon art."
The demon king Muzan, was glaring at a shivering female demon. This female demon was covered with bloody priestess robes.
She was kneeling before Muzan while trembling with fear.
"But Lord Muzan! My blood demon art is useful. I am not lying about my abilities."
"I can see people's sins. And my purification flames can burn a sinner's soul."
The priestess demon spoke quickly, trying to prove that she was useful. But the more she spoke, the more Muzan's rage increased.
"Is that why you thought to yourself, 'How ugly,' when you saw me today?"
"You are telling me that when you looked at me with those eyes, all you saw was sin?!"
Muzan's forehead throbbed. He was the demon king and thus could hear every demon's thoughts.
The first thing he heard was 'How ugly' when he met her today; it was after she awakened her blood demon art.
"What! You can hear my thoughts?"
The priestess demon finally panicked. Looking at the angry Muzan, she believed her chances of survival were zero.
"No! You can't kill me. You truly are full of sin; I am not lying!"
"You are in denial—"
_SPLAT_
The demon's head burst open in the middle of her sentence, which killed her on the spot.
"Trash."
Muzan's eyes glowed red with rage. His slit eyes scanned the priestess demon's body, which was slowly turning into dust.
But there was something that didn't disappear right after her death: it was her bright white hair, which looked like flames.
"Are those the purifying flames she was talking about? These flames are supposed to judge sins?"
Muzan sneered and angrily stomped on the flaming hair, putting out the fire.
_Wisss_
Or so he thought.
"Huh? Why did my feet catch on fire?!"
Muzan's eyes shook. The next thing he knew, was that his whole body had burst into flames.
"Aaaaaaaah!!"
Muzan screamed, and the purification flames rose high, like they had found high-quality fuel. The sins in Muzan's soul were so heavy that the dying flames had reignited.
"Aaaagh! Aaaaaaah!"
Muzan thrashed around; this kind of pain had completely caught him off guard. He felt like he was standing under the sun, but instead of his body, it was his soul that was burning.
"Aaaaagh! Noooo!"
Muzan kneeled over, and with a final, painful scream, the room felt silent.
_Sizzle_
It only took a few more seconds before the raging white flames also disappeared. As if they had lost their fuel source.
The only thing left in this room, was Muzan's body which still in perfect condition.
Miraculously, Muzan's body had no burn marks on it. The only thing these purifying flames burned, was the sinner's soul.
Muzan, the demon king, was dead. Leaving behind his body as an empty husk. Yet after half an hour, somehow Muzan's body twitched.
"Did I come to the world of demon slayers? Have I become Muzan?"
Muzan, the demon king, was staring blankly at his hands. It might seem like a miracle that a body without a soul had stood up again. But it wasn't a miracle.
"It looks like I have become Muzan. This should be a parallel universe where Muzan died accidentally."
Muzan slowly got up and dusted himself, the dust was the remains of the priestess demon. Muzan curiously observed the ash dust while remembering the original Muzan's memories.
"This priestess demon was once a human woman. Women like her are considered special in this world."
"Priestess women can suppress Muzan's curse on the Ubuyashiki family, after they marry into that family."
"That's probably why her blood demon art was something like the purification flames."
"She was a special demon, just like Nezuko. Who had the sun flames as her blood demon art."
Muzan frowned. He needed to be more careful before turning people into demons.
The real Muzan randomly turned people into demons in the hopes of finding a special demon, who could be immune to the sunlight.
It was a risky strategy, but he knew what the original Muzan was trying to do.
"I am the demon king, I do not age; I do not die; I am immortal with seven hearts, five brains and a body tougher than steel."
"But sunlight is my greatest weakness, the moment I step into the sun, I will die without question."
Muzan shook his head. This was a terrible weakness to have; no wonder the real Muzan wanted to get rid of it.
He could understand the original Muzan's obsession. Everything he did was to find a flower called blue spider lily.
That flower was the answer to all his problems; as long as he eats that flower, he will become immune to the sun.
Thinking of the blue spider lily flower, Muzan chuckled. What seemed like an impossible task for the real Muzan was easy for him.
"The original Muzan never found the flower, but I know where it is."
"In fact, I don't need the flower itself. Nezuko and Tanjiro have eaten it already."
"Their blood contains the flower's extract; their bodies have what I need. I just have to find them."
Muzan looked at his sharp and well-maintained nails while thinking of his next step.
"Tanjiro's nose is sharp, he remembered my scent in the original story, which gave me a lot of problems."
"It's best to avoid sending my demons to him; I should send someone else to Tanjiro's house, like a human."
"The human can pretend to be a doctor from the city, take their blood and leave without being suspicious."
While tapping his finger on a wall, Muzan thought of a possible subordinate he could deploy.
"Upper rank 2, Demon Doma, should be able to find a reliable human. He is the leader of the Bliss sect."
"He has many humans under his command. Those people can get me Nezuko's and Tanjiro's blood."
Muzan narrowed his eyes, This was an important task and should be done carefully. It was a good thing that Demons under him were trustworthy.
"Okay, it's decided. I'll send a human to Tanjiro's house. I hope everything goes smoothly."
Muzan thought of a plan and immediately contacted Doma, who was his second-strongest subordinate.
"Doma, it's me, Muzan. I want you to do something for me."
Muzan telepathically contacted Doma and told him what he wanted to do. He specifically warned Doma that a good-natured human must be chosen to do this task.
It was because Tanjiro could smell good and evil; it would be best if a good person approached Tanjiro when asking for his family's blood.
"I see Lord Muzan! I will get it done! I will send an honest human to get the Kamado family's blood."
Doma replied back in a sing-song voice, which seemed all too happy. But this happiness was fake. Muzan could read Doma's mind; that guy had no emotions whatsoever.
As a human, Doma was born emotionless; he faked having a smile all day long. And as a demon, he kept the same attitude he always had.
Muzan shook his head and decided to ignore him and cut the call. The demons under him were loyal but they were all kinds of crazy.
"I should probably check on their mental health sometime..."
Muzan muttered to himself while sighing.
"Whatever, I have other things to worry about. I hope Doma's men get Nezuko's blood soon."
"As long as I get sunlight immunity, I will never lose to the demon slayers."