"Kill him."
Inside the Infinity Castle, Muzan Kibutsuji's eyes widened until the veins around them bulged.
"Yes… kill him. Cut off his head!"
For the first ti in far too long, Muzan felt sothing close to impatience tearing through his chest. He wanted Kamanue to move faster. He wanted that boy dead now, before anything else could happen.
But the instant Kamanue stepped into the ruined room, Tanjiro Kamado—who should have been dying, unconscious, and helpless—opened his eyes.
His pupils snapped wide.
Then he stood.
The wounds through both sides of his chest began knitting shut at a visible speed. Torn flesh closed. Blood slowed. The fatal injuries that should have dragged him into death were forced back inch by inch.
Yet Tanjiro did not even look at himself.
His gaze went first to Zenitsu, collapsed and coughing blood.
Then to Nezuko, whose arm had been torn apart.
Sothing inside him broke.
Anger flooded his face—hotter, deeper, more violent than anything he had ever shown before.
Kamanue's expression changed.
"What… are you?" the Lower Moon demanded, voice cracking with disbelief. "What kind of monster are you?!"
Tanjiro ignored him.
He tightened one hand around Asuramaru's hilt and roared, "Asuramaru! Give the power to protect Nezuko! To protect my comrades! To protect everything!"
Inside the sword, Alex activated Demonization without hesitation.
In the next breath, a torrent of Demon Power poured into Tanjiro's body.
It flooded his bones, his muscles, his blood, his organs—every wounded, exhausted part of him. His strength surged at a terrifying pace.
At the sa ti, a pale-purple mark crept across the left side of his face. It spread like a living curse, crawling over his skin and staining one of his eyes with an eerie violet glow.
Tanjiro's breathing turned rough.
"It's not enough…"
His voice dropped, then rose into a near-hysterical roar.
"More! Give more! Asuramaru, lend all of your power!"
Black smoke burst from the air beside him.
It twisted and condensed in an instant, forming a figure with long dark-purple hair and crimson eyes. Pointed ears peeked through the strands, while a black-and-gold hair ornant frad the face. A pair of white horns curved from the forehead, and a flowing purple-and-white garnt stirred in the night wind.
It was Asuramaru's manifestation—Alex wearing the sword's beautiful and haunting form.
He stepped close to Tanjiro, leaned beside his ear, and smiled.
"Not bad, Tanjiro."
His voice was soft, almost coaxing.
"I'll give you as much as you want. Let loose. Release every desire you've been suppressing."
Kamanue froze.
The sight before him had long since escaped anything he could understand.
A dying Demon Slayer standing back up. Wounds healing like a demon's. A strange, beautiful figure appearing from black mist. That unnatural purple mark spreading across the boy's face.
What was happening?
What was this thing?
But Kamanue was not the only one whose mind was shaken.
Zenitsu Agatsuma, badly injured and lying on the floor, reacted even more violently.
His eyes widened.
The fear vanished from his face, replaced by a bizarre, deadly seriousness.
Where did this beauty co from?
I've never seen anyone so beautiful in my entire life.
I have to marry them.
No, first, the children's nas—
[TL/N: To avoid confusion, the MC is not a gender-bent character. His template is based on Asuramaru from Owari no Seraph, and Asuramaru is canonically male.]
In a single glance, Zenitsu's imagination had already sprinted past romance, marriage, and dostic bliss. His eyes practically turned into hearts. Even the pain in his stomach seed to disappear.
Alex noticed the almost-dripping stare and felt a chill crawl up his back.
Without a word, his manifested body scattered into black mist and flowed back into the sword.
Tanjiro, anwhile, had begun adapting to the power coursing through him.
One of his eyes had completely turned pale purple.
His usual gentle smile warped into sothing dangerous.
Sothing almost mad.
"Are you ready to die, demon?"
Kamanue's body stiffened.
Fear sparked inside him.
That was unacceptable.
He was a Lower Moon. A chosen demon. A servant of Muzan Kibutsuji.
How could he fear a brat?
"Who do you think you are?!" Kamanue roared. "I killed you once! No matter what kind of monster you've beco, I can kill you again!"
He lunged.
Each step smashed the wooden floor beneath him.
His tiger-like claws swelled, muscles bulging as he charged into the room and brought one massive arm down.
"Die!"
Tanjiro's eye narrowed.
In his vision, Kamanue's movent slowed.
Every twitch of muscle, every shift of weight, every line of attack beca clear. The sword in his hand felt closer than ever before, no longer rely a weapon, but an extension of his own body.
He moved.
The air split.
Tanjiro's figure blurred into afterimages, and the edge of Asuramaru carved through Kamanue's right claw and forearm.
Flesh and bone were diced apart in midair.
Severed pieces struck the floor one after another, spraying blood across the room.
Kamanue recoiled with a shriek.
Tanjiro did not rush.
He simply watched him with that cold, violet-tinted gaze and began walking forward.
Step.
Step.
Step.
Each footfall landed like a hamr against Kamanue's heart.
Alex's voice rang inside Tanjiro's mind.
"Your body can only endure this state for three minutes. Finish it quickly."
"I know."
Tanjiro's reply was quiet.
Then he took one step.
And vanished.
Kamanue's pupils shrank.
"Where did he—"
Before he could finish, Tanjiro appeared directly in front of him.
A horizontal slash swept out.
Kamanue threw himself upward on instinct, barely dodging the killing stroke. But he was still too late.
An arc of black mist erupted from the sword's path.
It swallowed the space beneath him.
Kamanue's lower legs disappeared.
Not cut.
Annihilated.
His body lurched in midair, blood scattering into the night. For the first ti, true terror seized him—not wounded pride, not anger, but the cold certainty that if he stayed, he would die.
How?
How did this brat beco so strong?
Kamanue twisted his floating body and shot toward the broken wall, fleeing into the night sky.
"This isn't over!" he scread, forcing bravado into his voice. "Next ti, all of you heinous villains will die!"
Tanjiro stepped into the corridor.
His mind was unnervingly clear.
He raised Asuramaru forward, letting the sword guide him.
"Ashura Kannon…"
Black mist poured from the sword, gathering before him.
"Three Swords."
Three dark swords ford in the air, each wreathed in crimson fla.
They locked onto Kamanue.
Then they flew.
The three swords tore through the night with piercing shrieks and stabbed straight through Kamanue's body.
Demon Power invaded his flesh, corroding his cells from within.
His body spasd.
He lost control of his flight and crashed into the courtyard below, smashing into the ground hard enough to throw up a cloud of dust.
When the dust settled, Kamanue lay in the crater, impaled by the black swords. His limbs were ruined. Blood pooled beneath him. His body trembled, battered beyond recognition.
Tanjiro walked toward him.
Only one minute had passed.
"Goodbye, Kamanue."
His voice was almost gentle.
Then his figure disappeared again.
Kamanue's vision spun.
The world flipped once, twice, then settled.
The last thing he saw was his own headless body lying in the courtyard.
.....
[If you don't want to wait for the next update, read 50 chapters ahead on P@treon.]
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