Kokushibo who is now in his monster form looks at his reflection in Sanemi's katana. He looks so disgusting and ugly that he lets his guard down. He can't imagine that he lived for centuries just to become an ugly monster.
His body starts crumbling as he stops regenerating. Sanemi and Gyomei are still attacking him and almost destroying his entire body. He sees his younger brother, Yoriichi Tsugikuni asking him to go with him.
"It's heart-wrenching, brother."
"Brother, it's over now. Please give up and let's go together. Wherever you go, I'll follow you."
His entire body has almost crumbled and vanished into ashes. For the last time, sees glimpses of his younger brother, Yoriichi Tsugikuni. Despite losing his will to live, he refuses to go with him. He wants to live... He wants to become the strongest...
...
He regenerates his entire body in a matter of seconds and sprouts four powerful tentacles from his back. Throws them away with his immense force and glares at them with his 6 eyes. He has devil-like horns, his nails are scarier than swords, his sharp canine teeth are like vampires, and his demon mark is spread on his entire body. He looks like a complete devil. His eyes turn crimson red and death stares at them.
His fearful appearance can even kill a baby in an embryo. At this point, he looks even scarier than the demon king himself.
"Aah sh*t, he's regenerated his body," screamed Sanemi in anger.
"Shinazugawa, I am sensing something terrible, could it be..?" panicked Gyomei.
Kokushibo screams so loud that his scream shakes the entire Infinity Castle and demolishes the pillars on the battleground.
"We're too late," scared Gyomei.
They lounge at him, but Kokushibo teleports behind them in no time.
He uses...
Moon Breathing Third Form: Loathsome Moon Chains
They couldn't react to his attack and got heavily injured. Sanemi loses his both arms in an instant.
"SHINAZUGAWA!!!" screams Gyomei.
In his next blow, Kokushibo decapitates Sanemi's head. Gyomei didn't waste any opportunity to attack him and engaged in an epic fight with him. But Kokushibo easily deflects all of his attacks and overpowers him in no time.
"Tch... He's way too overpowered. I can do nothing but defend myself," thinks Gyomei.
Kokushibo uses... MOON BREATHING 16TH FORM: MOONBOW HALF MOON
Gyomei uses... STONE BREATHING 5TH FORM: ARCS OF JUSTICE
They clash their weapons and its impact is so huge that the entire battleground turns into ashes. The only visible thing is the cloud of dust.
Gyomei falls to the ground and loses within a minute. Despite being the strongest Hashira, he stands no chance against Kokushibo.
"So your name is Himejima? Stay proud, you warrior. Do you have any last words to say?" asked Kokushibo and put his sword on his neck.
"One day, you'll pay for your sins. You'll pay for what you've done. In the end, you'll do nothing but regret it."
"Oh, is that so?" Kokushibo decapitates Gyomei's head and ends the battle.
Akaza and Douma also won their respective matches.
Akaza refused to go back with his wife Koyuki and killed both Tanjiro and Giyu.
Douma was playing with Kanao and Inosuke after absorbing Shinobu. But Muzan warns him that Shinobu did something wrong with his body, so he must kill both Inosuke and Kanao. Douma kills both Kanao and Inosuke but Shinobu's poison still works. But that's too late, after some time, he successfully regenerates himself.
All the upper moons survived while the demon slayers died.
After recovering from his first drug, the demon king, Muzan emerges from the fleshy cocoon. He has so many mouths and hairs throughout his body along with several tentacles on his back.
"Akaza, Douma, Kokushibo, I am proud of you."
"Hahaha… Thank you thank you, Muzan-Sama," laughs Douma.
After that, they kill the remaining demon slayers, Obanai and Mitsuri, without any effort.
Kokushibo astonishingly looks at Muzan. His eyes widened in disbelief but...
"What's the matter, Kokushibo? Why are you staring at me?" asked Muzan.
"Muzan-Sama, those drugs are slowing down your regeneration and turning you back to human. You can instantly regenerate yourself but these drugs are slowly killing you, like a poison. I'm afraid, you'll turn back into a human by tomorrow," said Kokushibo in panic.
Muzan realizes that he is unable to read the thoughts of other demons, as they are beyond his influence. He also discovers that he cannot cause the cells of other demons to explode.
"It can't be… which drugs did that b*tch use on me? Am I turning into a human? No, if I absorb all the upper moons then I may be able to live more.
Or I have another choice as well. If I let my Upper Moons absorb me and after so many decades, I'll kill one of my upper moons and then take his body. That must be Douma but it will take so much time. The first choice is better but useless. What should I do?" thinks Muzan.
"What's bothering you, Muzan-Sama?" asked Kokushibo.
Muzan furiously looks at them and says, "My demons, if I absorb y'all then I might be able to live longer. I'm proud of y'all, but your journey ends here."
Muzan releases all of his tentacles and lounges at Kokushibo, Akaza, and Douma. Akaza and Douma couldn't even react as Muzan was too fast for them.
Moon Breathing 6TH Form: Perpetual Night Lonely Moon
Kokushibo knocks back Muzan and cuts all of his whips along with his right arm. Muzan regenerates all of them instantly.
"Nice move, Kokushibo. I always wanted to fight you to test your powers. I always saw you as a business partner, but let's fight one last time," said Muzan in excitement.
"As you wish, Muzan-Sama!," said Kokushibo.
Nakime doesn't know what to do, she's completely silent. Muzan has lost his control over her, and she is too inferior to even interfere.
"Oh my! Seems like something crazy is gonna happen," said Douma sarcastically.
"Shut Up, you b*tch. It's not a playground where you can play, if you won't fight back then all of us will be killed," said Akaza.
"Akaza-dono, that's so harsh."
Akaza and Douma engage themselves in a fierce battle with Muzan.
"Destructive Death… Compass Needle" Akaza's most broken technique.
Muzan glares at them and approaches them, "How pathetic, my demons. You're fighting me just to stay alive? Alright, then do your worst."