I'm back from the hospital and unfortunately alive so here's a chapter. Also you can probably guess that I type fast as shit... like FAST so this ligit took me 20 mins to write

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{third POV}

"You'll feel so much better Tanjiro" Muzan grinned, snapping his fingers to make a small human child appear before him. She had reddish-brown hair with shining lavender eyes, complimented with a floral themed Kimono.

She looked terrified.

And she was loosing blood from a gash on her arm Muzan had made to tempt Tanjiro.

The boy's slitted eyes vibrated with need, his mouth drooling even more at the sight "don't hold yourself back." Muzan lured, forcing the girl to take a step closer to Tanjiro.

"Where. Is. Nezuko" Tanjiro forced out through clenched teeth, never straying his eyes from the girl's blood.

"If you eat this human, I'll let your sister go" he stated, snapping his fingers once more; making Nakime strum her Biwa and change the surroundings.

The three shifted to a dark stuffy room. Dust circulating the air as the rattling of chains caught Tanjiro's attention.

"Nezuko!" He yelled, sprinting up to the iron bars where his sister sat chained on the floor. He desperately reached his arms through and attempted to get a hold of her but the bars were simply too thick and she sat far away.

"Nezuko! I'm here! Nezu-" Muzan stopped his screaming when he grabbed Tanjiro by the back of his neck; lifting him off the floor and shoving the boy's face next to the bleeding girl.

"Eat her and Nezuko will be free!" He yelled, making the girl cower against the wall in fear; tears welling in her soft lavender eyes.

Tanjiro gave in.

His whole body trembled in Muzan's hold, opening his mouth and widely as his teeth got dangerously close to the child's skin. Muzan's smirk grew with satisfaction as he watched the scene play out.

"I WANNA GO HOME! PLEASE!" The child is wailed, scrunching her vivid eyes in fear as she shrunk away from Tanjiro's teeth.

He froze.

'No no... what am I doing?!' Tanjiro thought in a panic, regaining a sense of his old self at hearing her desperate cries for her life.

Tanjiro growled once more, picking up his sword which laid at his feet and swinging it around to free Muzan's hold on his neck.

Muzan jumped back with ease, glaring at Tanjiro as he moved his body to protect the terrified child; sword pointing directly at the demon's neck.

"Your weak Tanjiro. You don't stand a chance against me without flesh" he hissed, trying to work his way into Tanjiro's mind.

"I don't want to kill you"

"Well i can't say the same for you" Tanjiro growled
back; eyes vibrating with rage as he glanced at Nezuko. Her wrists were chained to the wall along with a metal collar keeping her to the floor so she couldn't stand.

Tanjiro lunged for the demon, using sun breathing to land a hit on his arm. Muzan swerved narrowly to the right, surprised at the boy's speed and accuracy.

Sweeping his leg across the floor, Tanjiro tripped up the demon and clawed Muzan's cheek; narrowly missing his eye as the male sprung off the floor.

"You're fast..." Muzan smiled sinisterly, letting the deep claw marks in his face heal almost instantly.

Taniiro ignored his words once again and leapt onto the male with his teeth barred, ripping into his shoulder as Muzan whacked him away; making him rip of a piece of flesh in the process.

Tanjiro crouched to the floor and spat out the skin in disgust; blood seeping from his mouth.

His attacks were erratic and uncoordinated, much different to how he usually fought.

Muzan smiled wildly and healed his shoulder instantly, taking pleasure in seeing Tanjiro in such a state. He was destroying himself, Muzan didn't have anything to do but wait.

He was fuming with rage, thinking in-strategically and attacking with blind anger.

And that would be his downfall.

Tanjiro drew his sword back once more, stabbing it onto Muzan's side while he kicked the demon king back against the wall with brute force.

However, Muzan simply coughed and stood up afterwards; healing himself once more. Tanjiro grew even more in anger that he couldn't even make some proper damage on the male.

Muzan was simply mocking him at this point.

"Are you done?" Muzan snarled with an amused face, dusting off his suit.

Tanjiro glared at the male and took a deep breath, closing his eyes while going completely silent.

Muzan raised an eyebrow and waited for his next movements; curious as to what Tanjiro would try to pull off.

His eyes snapped open. They were completely white, no colour or pupil visible; just a deep void of nothing.

Crimson tears started to leak from his tear ducts, blood trailing down his face as his body grew considerably in size. Then, long sharp spines sprouted along his arms, around half a meter in length accompanied by a deadly point at the end.

He let out deep breaths into the surroundings, chest heaving up and down as the mark on his forehead began to spread across his face.

Tanjiro lifted his sword to point directly at Muzan, the blade turning a dark shade of red in his hold.

~Muzan's flash back~

Run

I've got to flee!

Sprinting through the dark town, I felt my feet slip from underneath me, making me fall to the floor as he slowly approached me.

Why aren't my wounds healing?!

"Tell me Kibutsuji...What is the value of a life to you?" He growled, face distorted by the dim lighting as he stared down on me.

How does he expect me to answer that?!

"You are a monster Kibutsuji" he stated, drawing his sword back.

I shuffled across the floor and shook my head violently;

"You are the real monster ! Not me!!"

~end of flashback~

Muzan broke out in a cold sweat when he saw Tanjiro.

Such resemblance... it scared him.

Tanjiro let out a high-pitch shriek into the cold room and lunged forwards, grazing Kibutsuji's chest with the spines on his arms before he dodged.

Muzan's eyes widened in fear, what was this new aura coming from the boy? It was threatening. Heavy and constricting.

"Nakime!" He screamed, veins pulsing as the room changed by the sound of her biwa.

Tanjiro appeared in the same room as before with the desk; except this time there was a futon to the side and other complimenting furniture. The room had an eerily comfy feeling to it, something about it was just off.

Suddenly another strum of a biwa sounded, and in front of Tanjiro appeared Kokushibo.

"You... you took Nezuko didn't you?" Tanjiro hissed, his nose instantly remembering the scent from her room. Kokushibo just looked at him emotionlessly, his grip around his sword never once faltering.

"You look exactly like him... even your sword. Is it possible that you have come back to me brother? In another body?"

Tanjiro scrunched his features in disgust "don't flaunt your pitiful fantasies on me, I am of no relation to you. Scum" the boy spat, words seething with venom as the spines on his arms grew in length; beginning to drip a thick black liquid from the top.

Kokushibo narrowed his many eyes and clicked his tongue "is that so?" He stated, swinging at Tanjiro using his breath of the moon.

Tanjiro snarled and met with the demon halfway through his technique, their blades clashing together as they pushed against one another.

Tanjiro gritted his teeth and made his body grow almost twice the size as he struggled against the upper moon.

Kokushibo held his stance, their blades scraping each other and waiting for one to falter.

It was a stalemate.

Well, at least it was until Taniiro got tired of the relentless pushing and swung his free arm towards the other and forced him to dodge.

Tanjiro took this chance to stab him in his side with his spines, jumping to the side to avoid a quick slash afterwards.

Kokushibo attacked Tanjiro again with a series of moon breathing techniques. However Tanjiro wasn't making any attempt to counter his attacks, he was simply dodging them with a wide smile.

"Why won't you fight?" He monotonously questioned, continuing to unleash attacks towards the boy.

"3, 2... 1" by the end of Tanjiro's sentence, the upper moon froze and dropped his sword to the floor; his body falling to onto the varnished wood limply.

Tanjiro walked up to the demon and stared down on him, tracing his clawed finger up to the tip of the spines on his arms "quite effective isn't it? I had time to master it when I was looking for this god-forsaken place. You'll be paralysed like that for several hours, I could cut your head off right now... however if you tell me the whereabouts of my sister. I'll spare you're life"

Tanjiro smirked at his victory and pressed his blade to the demon's neck, waiting for his reaction.

Kokushibo had severely underestimated Tanjiro.

The upper moon was about to speak when a demanding voice intercepted his "well that's it for the blood battle"

'Blood battle?' Tanjiro thought, looking for the direction of the echoey voice.

"Welcome to the upper ranks Tanjiro" Muzan's unmistakable voice snarled, making Tanjiro panic a little as Kokushibo vanished and he found himself kneeling in front of Muzan.

Tanjiro quickly analysed the situation.

Tricked.

Tanjiro had been tricked into challenging Kokushibo to a blood battle.

What a sly and corrupt man Kibutsuji was.

Muzan smiled as Tanjiro's aura weakened; his pure white eyes slowly fading so you could see their bright red colour once more. His body reverted back to his usual size as the spines on his arms disappeared almost instantly.

The previous rage that filled him now was pushed away by the drowning sensation of defeat and failure.

"Perfect" Muzan hissed, swishing his hand in the air and making blood spurt from Tanjiro's eye. He cried out in pain, falling to the demon king's feet as he shielded his hand over his eye.

"Welcome... upper moon Zero"

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I hope this was ok