"Shan Yi…………"
"Grandpa, I will protect you."
At this moment, Kuwashima Jigoro was filled with mixed feelings.
The timid Zenitsu is now capable of standing on his own, while Kaigaku, whom he once took pride in, has turned into a demon and is now attacking him.
Kuwajima Jigoro closed his eyes, and the image of Zenitsu and Kaigaku training under him flashed through his mind.
[Quickly learn from Kaigaku, don't be so timid, be like your senior brother!]
Thinking of Kaigaku, whom he once regarded as a role model and urged Zenitsu to work hard, who had become a demon, and who would use the breathing sword technique he learned to slay demons against the Demon Slayer Corps and even ordinary people, Kuwashima Jigoro felt a pain in his chest.
Sensing the disappointment emanating from his grandfather behind him, Zenitsu's gaze turned even more solemnly to Kaigaku opposite him.
To actually hurt Grandpa... Unforgivable!!!
In Kaigaku's gaze, Zenitsu's cowardly image gradually became distorted.
Evil... evil spirit?
No, I'm the evil spirit!
"I don't need this [First Form]! Anyway, I've already become a demon and have eternal life. From now on, all I need to do is keep eating people. One day I'll be able to develop my own unique sword technique!!!"
Kaigaku gritted his teeth and wielded his dark gold demon sword, unleashing a slash at Zenitsu and Kuwajima Jigoro.
"Breath of Thunder, Second Form: Rice Spirit!"
"Thunder Breathing - Third Form: Gathering Mosquitoes into Thunder!"
"Thunder Breathing - Fifth Form: Heat Realm Thunder!"
"Breathing of Thunder - Land Form: Lightning Boom!"
A maniacal smile appeared on Kaigaku's face as he unleashed five sword techniques of Thunder Breathing, excluding the first form.
Such a high frequency of sword use was something he never dared to imagine in his human days, because he hadn't even reached the "normal" level. Let alone Upper Moon 6.5, even Lower Moon might have killed him.
At this moment, Kaigaku was excitedly enjoying the exhilarating feeling that came with his increased strength. His goal used to be "Pillar", but after becoming a demon, his goal had become "Upper Moon".
Compared to the upper curve, what is a pillar?
I heard that every Upper Moon has eaten more than a dozen Pillars. I want to be like that in the future!
Streaks of pitch-black lightning shot out in all directions. Regardless of the power of these black lightning bolts, the visual effect was at its peak and very visually impactful.
As Kaigaku unleashed a barrage of unorthodox, stacked attacks, thick smoke billowed up in front of him.
"Well, now you know how powerful I am!"
Kaigaku laughed out loud as he watched the billowing smoke rising ahead, clearly unaware of the famous "no harm from smoke" principle.
The thick smoke quickly dissipated, along with Kaigaku's loud laughter. His expression froze as Zenitsu and Kuwajima Jigoro stood right in front of him. He hadn't even managed to injure them, let alone kill them.
Zenitsu stared at Kaigaku with a deathly gaze, a look that chilled Kaigaku to the bone, instantly cracking the pride he had just managed to build up.
Why? Why? Why?
Why did that good-for-nothing Zenitsu become so strong?!
Is there any shortcut better than becoming a ghost?
Could it be that the old man secretly taught him a method to quickly become stronger?
Could it be...?
Just as Kaigaku was frantically searching for excuses to make up for his failure, Zenitsu once again performed the "First Form," but Jigoro Kuwashima behind him realized that this was definitely not the "First Form," but rather...
"Thunder Breathing - Seventh Form: Fire Thunder God!"
With a silent thought, Zenitsu vanished from beside Kuwajima Jigoro, moving with godlike speed to unleash a swift sword strike.
The golden thunder dragon danced in a "Z" shape, its ferocious maw opening wide to tear and shatter Kaigaku's neck.
Kaiyue was completely caught off guard by what happened and didn't realize his neck had been severed until his vision was reversed.
Too fast!
This is definitely not a "lightning bolt"!
"Old man! You really are biased towards this guy! You actually taught him other sword techniques instead of me!!!"
Kaigaku's head fell to the ground, and he gritted his teeth as he unleashed a furious, impotent rage at Kuwashima Jigoro, whose body had now grown enormous.
Zenitsu, who had unleashed this sword strike, turned to look at Kaigaku's head lying on the ground and said earnestly, "This is a sword technique I created myself. I once thought of using this move to fight alongside you."
Kaigaku's eyes trembled as he listened to Zenitsu's words, his mind filled with "Impossible!" His cheap pride struggled to hold on, but as he watched helplessly as his body collapsed, his cheap pride gradually crumbled.
"Impossible...impossible...impossible...I can't even create my own sword techniques, how could this guy...I don't accept it...I don't..."
Kaigaku died without ever repenting for his actions. In a fit of impotent rage, his head and body turned into dust and vanished into the air.
Zenitsu's gaze lingered on the spot where Kaigaku's head had disappeared for a long time before he closed his eyes.
"Farewell, elder brother."
Daylight broke out...
Tanjiro, at the Demon Slayer Corps headquarters, got up early. A new day meant a new round of training, and the issue of rest was no longer a problem after Chinatsu woke up.
A few minutes after Tanjiro woke up and left the mansion, Chinatsu also came out, yawning and rubbing her eyes, looking like she hadn't woken up yet.
"Sister...you could go back and sleep a little longer."
"It's alright, it's alright. I was the one who said I would train with you, so I have to do my best."
Chika stretched heavily, trying to adjust her mental state, but to be honest, she hadn't yet returned to her best condition.
The battle with Kokushibo had taken a toll on his body. Although he spent two months in a coma recovering, he was only about 70-80% recovered.
Chinatsu was already considering how long she would be unconscious after dealing with Muzan, but as long as she could successfully defeat Muzan, Chinatsu was willing to sleep for three to five years.
"Tanjiro, have you noticed that no matter how much you train your Hinokami Kagura's proficiency and physical strength, the Hinokami Kagura's endurance just won't improve?"
"Hmm? Hmm! At first, when I was training my body and skill, the duration I could maintain the skill did improve significantly, but recently that improvement has become much less."
Tanjiro looked at the Nichirin Blade in his hand and thought about his recent slow progress. He couldn't help but feel a little disappointed, but this disappointment quickly faded because he thought that his sister had suddenly mentioned this, which meant that this was the problem to be solved next.
Chinatsu gave Tanjiro a big thumbs up in her heart for being such a quick learner.
Chika cleared her throat and transformed into a top-notch teacher, beginning her lesson. What she was going to teach was the "Thirteenth Form of Sun Breathing," which is the concept of creating a cycle through the continuous use of the first twelve forms.
Before entering the Infinity Castle for the final battle, everyone—from the Nine Pillars to Tanjiro and even Chinatsu—must become stronger.
After all, Muzan is far stronger than Kokushibo...
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