Awaken the Sharingan, kill Muzan and open your Mangekyō!

Nightmare!

Like the previous eye techniques 'Kai' and 'Kei', this is another new eye technique that Uchiha Isha has obtained.

As for the ability of the eye technique 'Nightmare', it is naturally similar to the blood demon technique of Nightmare.

Originally, Uchiha Isha was not optimistic about this.

After all, the ability of Nightmare overlaps with some of the abilities of his Sharingan, whether it is hypnosis or creating dreams. At most, there is an additional ability to destroy the opponent's spiritual core to destroy the opponent's consciousness.

And this ability is a double-edged sword.

But in fact, when Uchiha Isha got the eye technique 'Nightmare', he felt unexpectedly happy.

As a eye technique, 'Nightmare' can not only greatly enhance the illusion ability of the Sharingan in this aspect.

Moreover, it can also destroy the opponent's spiritual core by invading the spiritual world through illusion.

And he himself will not be resonated by the opponent's self-consciousness, and thus be affected by the opponent.

The most important thing is that he can also superimpose the illusion ability of the Sharingan and the ability of Nightmare to create dreams.

In this way, the effect of"dream in a dream" can be achieved, just like Inception.

And if the person trapped in this eye technique wants to get rid of the dream by suicide and regain consciousness.

The influence and interference brought by the illusion will also make his real body commit suicide.

Even if the other party can wake up and leave the dream, he will end up committing suicide.

However, this is a little difficult to kill a ghost.

The vitality of a ghost cannot lead to death by"suicide".

Unless the ghost uses the Nichirin sword to commit suicide, or uses the wisteria flower poison to commit suicide.

For a ghost like Muzan Kibutsuji who has broken through the boundary between life and death and does not have a weakness in the neck, even suicide with the Nichirin sword is useless.

Even the poison that can kill the upper-rank ghost, he may be able to slowly decompose and digest it.

That being said!

Uchiha Isha didn't want the ghost to commit suicide directly.

As long as he can use this to control the ghost for part of the time, he can personally kill the ghost trapped in the dream

"This is really good!"

In short, Uchiha Isha was quite satisfied with his new eye technique.

"Cha Cha Wan——"

After feeling his own eye technique, Uchiha Ixia called out this name in a certain direction.

This is the name of the cat raised by Tamayo.

Originally, Chachamaru was always following Tanjiro so that he could send the collected demon blood to his master Tamayo.

Since Tanjiro is currently training, this task was placed on him.

Chachamaru also followed him at Tanjiro's notice.

"Meow——"

A cat's cry was heard.

Chachamaru, who was wearing an invisibility charm made by Yushiro, a subordinate of Tamayo, suddenly appeared in front of Uchiha Isha.

"There are two copies in total, one for Tanjiro, and ask him to give it to Shinobu Kocho"

""The other one, bring it to your master."

Uchiha Isha said to Chachamaru.

He put the two needles and two eyes in his hand on the bag on Chachamaru and fixed them firmly.

"Meow——"

Cha Cha Wan nodded.

After that, under the effect of the invisibility talisman, its figure became transparent again and disappeared into the darkness.

"Ishako——"

When Chachamaru's figure completely disappeared,

Kanao ran out of the Infinite Train with Zenitsu and Inosuke.

It was almost the moment when Uchiha Ixia killed Nightmare, one of the Lower Ranks.

They also killed the demons in the carriages they were responsible for.

This also ensured that there were no casualties in all the carriages.

Their mission this time was successfully completed.

"Kanao, please notify Yin to help deal with it."

"Also, be aware of everything around you."

"In addition to the lower-rank one, there may be new demons that appear later, and they may be upper-rank demons."

Uchiha Ixia said.

He could not guarantee whether the demon that would appear after Nightmare's death would still be the upper-rank three, Akaza.

But Muzan Kibutsuji would definitely send an upper-rank demon to attack him, that's for sure.

Because this time he did not use the Sharingan to affect Nightmare's senses, allowing Nightmare to clearly see his Sun Breathing.

Today, he has no need to do so.

Even if it is to kill himself, a swordsman who uses Sun Breathing, Muzan Kibutsuji would send a nearby upper-rank demon to kill him.

"I, I know!"

Kanao suddenly became nervous when she heard that.

After all, this is an upper-rank demon.

Although the Demon Slayer Corps has killed many lower-rank demons from ancient times to the present, there is no record of killing an upper-rank demon.

On the contrary, many pillars of the Demon Slayer Corps are suspected to have died at the hands of upper-rank demons.

Even her most grateful and favorite sister, Butterfly Kanae, died at the hands of an upper-rank demon.

As for the information about that upper-rank demon, no one in the Demon Slayer Corps knows.

At most, they know some of the other party's weapon characteristics and preferences.

This also makes the existence of the upper-rank demon very mysterious and powerful.

Now there is information that there is a suspected upper-rank demon attack, how can she not be nervous

"I will ask the Crow to ask Sister Shinobu and the others for support."

Kanao was about to ask her Crow to ask for help from other pillars.

""Okay!"

Uchiha Isha nodded slightly.

It might not be too late to ask for help now.

With his strength, he might not need the help of other pillars at all.

This is especially true if the upper-rank ghost is indeed Akaza.

Just the fact that he has mastered the transparent world is destined to restrain Akaza's fighting spirit.

Coupled with the power of the red sword and his own physical fitness.

Even if he does not risk opening the pattern, he can still defeat and kill Akaza.

Not to mention, he also has the Sharingan

"Are there really upper-rank demons?"

"No way, are we going to die here?"

Unlike Kanao's nervousness, Zenitsu was scared to death at this moment, trembling and crying.

On the contrary, Inosuke seemed full of fighting spirit.

"No matter if he is a lower-rank demon or an upper-rank demon, I can kill him.

Inosuke waved the Nichirin sword with a broken blade in his hand.

""Stupid, this is an upper-rank demon!"

Zenitsu said unhappily.

Sometimes, he really admired the ignorance of this"pig-head".

They have not even fought against the lower-rank demons, how can they fight against the upper-rank demons?

The upper-rank demons, even the pillars of the Demon Slayer Corps may not be able to defeat them.

In this regard, he has heard about the relevant deeds from the grandfather of the former Sound Pillar.

"Okay, stop arguing!"

"I don't need your help later. You are no match for the upper-rank demons."

"Just help protect the ordinary people on the train."

Before Inosuke could start arguing with Zenitsu,

Uchiha Ixia, who was a little impatient, interrupted the two.

He himself began to pay full attention to the movements around him.

Seeing Uchiha Ixia like this, Zenitsu and Inosuke stopped talking.

According to Uchiha Ixia's instructions, they and Kanao each guarded around the Infinite Train, waiting for the next incident.

……

""It's coming!"

About seven or eight minutes later,

Uchiha Ixia felt a strong breath approaching quickly.

It seems that the upper demon is coming very fast.

"Akaza?"

"It seems that this has not changed."

Using his Sharingan, Uchiha Isha has already observed the attacking figure.

It is the Upper Three Akaza.

"Upper, Upper Three!?"

"An upper-rank demon really has arrived!"

"……"

When Akaza's figure approached, Kanao, Zenitsu and Inosuke also observed Akaza's attack from a close distance.

When they saw the words"Upper Rank" and"Three" in Akaza's eyes, they were all shocked.

Not only is an Upper Rank demon coming, but it is also such a high-ranking existence?

Then the opponent's strength is not...

For a moment, Kanao and the other two were very worried about Uchiha Isha.

Kanao was even ready to go against Uchiha Isha's instructions just now and help Uchiha Isha at any time.

She already has the strength to match the nine pillars and can help Uchiha Isha fight.

"hehe……"

"Is that you? The swordsman who was specially assigned by Muzan-sama to use the Breathing of the Sun?"

"It seems that you knew I would come and were waiting for me here.

Akaza didn't pay attention to the 'weak' Kanao and the other two not far away.

Maybe Kanao's strength and aura would make him pay attention.

But at the moment, he paid more attention to Uchiha Isha, the person who was personally ordered to be killed by his immediate superior, Lord Muzan.

"That's right!"

Uchiha Isha stood up.

He had already drawn the Sun Blade from its scabbard and was ready to fight.

"You seem to be confident in your abilities."

"Yes, just by looking at your eyes, I can already see how strong you are."

"You should be the pillar of the Demon Slayer Corps, right?"

Akaza narrowed his eyes slightly.

The tempered fighting spirit on Uchiha Isha's body, just by looking at it, he could see how powerful Uchiha Isha was.

In fact, it was close to the supreme realm.