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The Cleansing

Summary:

For a thousand years, the demons were allowed to rule the world in the shadows, the humans remained completely ignorant of the carnage these monsters spread.

That was until an event landed upon the face of the earth.

An event that rocked the world and opened their eyes.

An event that Muzan and his demons will forever fear and dread.

An event called "Extermination Night".

Chapter Text

9 PM

The Southwest village is home to many men and women all doing their part to survive in the world. However, an issue, has arisen, many young men and women have been disappearing lately and their authorities can't figure out who is responsible for these terrible tragedies, however, the Demon Slayer Corps knew very well who was responsible, and it was not human.

A demon slayer called Tanjiro arrived on the scene to help solve this problem. He arrived in the evening and began searching for the demon that caused this mess.

'Where is this guy?' Tanjiro thought to himself as he ran through district after district, eventually, he found a demon eating on a human. His skin was pale with horns protruding out of virtually every part of his body. Tanjiro unsheathed his sword and began charging at the demon, the demon immediately noticed and dodged the incoming attack to his neck.

"A Demon Slayer! A young one. NICE!" He thought to himself aloud as Tanjiro went into his fighting pose.

The Demon summoned his blood demon art, tentacles sprouting from the horns and began attacking Tanjiro from all sides as he struggle to deflect all of them. Another Demon came up from behind him as Tanjiro forcefully slid to the right.

'Don't tell me.. this was an ambush!' Tanjiro kept on fighting the oncoming waves of attacks. Nezuko jumped out of the box and began attacking the demons, however, these demons are of much higher caliber, so she was unable to properly ward them off and was knocked to the ground by another demon. Soon, there were around 12 demons circling them both.

"Wow, they look delicious!"

"I know right, I cal dibs!"

"No way man!"

"Shame it wasn't a Hashira. "

Tanjiro struggled to get up as Nezuko slowly regenerated her limbs before getting them crushed again.

"Muzan would love this, hey you, tell them we captured a rogue demon!"

"no.." Tanjiro breathed out, 'I shouldn't have gone on this alone, Zenitsu, Inosuke, Tomioka-san, Okaa-san, I'm sorry..' as a demon began enlarging her claws and prepared to strike when-

(9:00 P.M)

A loud thud rumbled the ground.

The Happy Demons turned around and saw a pile of feathers. Tanjiro while pinned down on the ground, was able to see it under the feet of the demons.

"What the hell? Hey, this is our turf!" A demon yelled as he summoned his metal spears and threw one at the anomaly.

To the demon's dismay, one section of the feathers caught the spear, curled up on it and pressed it so hard that it broke into two pieces. The feathers curled up and revealed themselves to be wings with a man, no, a thing in the middle of it all. He was a humanoid, sprouting the shape of a human, but had feathers around his neck, sprouting a form of grey clothing. On his face were two large horns, a large halo on top and below it, a heart-shaped mask of sorts . It stood there for a few seconds before it's face lit up, the mask dawning a large X and a circle where it's eyes should have been, lastly, a large malicious grin spread wide on his face.

It was fair to say that this thing had no intention on joining them.

"KILL HIM!" A demon yelled as he charged at him. The feathered creature pulled out a spear with it's tip glowing white and stabbed him in the chest with it and pushing him back with his leg. The demon after recovering, laughed at his face alongside the other demons.

"HA! NICE TRY UGLY! ONLY THE SUN AND A NICHIRIN SWORD ON THE NECK WOULD BE ABLE TO KILL US!" The demon laughed, but then, he noticed something odd, there were white spots around the wound he was stabbed, and it began melting.

The other demons looked in horror as bit by bit, their acquaintance began melting and screaming in absolute pain. White cracks covered his body and began evaporating his body even further. The demon was on the ground at this point yelling and screaming for it to end. His cells were dying unbelievably fast. The horned organism began walking towards him and smashes his head into blood and gore with his boot, covering the horrified demons, a shellshocked Tanjiro and himself with it's blood. Eventually, his body evaporated into nothingness, alongside his blood, leaving no trace that he ever even existed.

The other demons began running in every direction, desperately trying to get away from this thing. Tanjiro looked up to this thing, no, this man. To his stupefaction, the clouds above rained lightning on to the ground even when it was not raining, and thousands of men and women looking identical to his saviour began dropping down from the heavenly clouds above. The civilians opened their curtains and could not believe what they were seeing.

The demons, completely pale and horrified began running even faster to escape, but they caught them anyways and slaughtered them. A demon was able to escape into his pocket dimension while chaos ensues in that town. To his horror, a white-tipped blade cut through and ripped opened to reveal one of these creatures with a petrifying grin. The demon got on his knees and began begging.

"Please, don't kill me..I beg you, PLE-" The demon was cut off as the sword was thrusted into his head, dismantling his vocal cords and head from his body. The life form thrusted the weapon out of his head as his body began melting and the pocket dimension started falling apart. The winged man went out of the area, joined his kind and started an event that would forever change Japan.

"Extermination Night" has began.