Demon Slayer: Can I add points to my Breathing Technique?

He ignored the astonishment of the swordsmen.

Xia Xi looked at the two still-living ghosts and grinned.

"Perfect, I'll use the two of you to test my upgraded knife."

"Anyway, you evil spirits don't feel pain, do you?"

The demons and swordsmen all shuddered.

But Xia Xi didn't care about any of that and attacked the two evil spirits with her knife.

"Don't underestimate me!" Earth Blade, with an energy level of 62, roared and charged towards Xia Xi.

After a few breaths.

[Proficiency +41]

[Proficiency +83]

[Proficiency +101]

After Xia Xi severed the demon's head, the battle on Xue Bai Shi Zi's side was nearing its end.

The already wounded demon had its limbs severed.

Instead of taking the opportunity to behead him, Shiko silently sheathed his Nichirin Blade and looked at the boy.

"You little bitch, if I hadn't been careless, how could I have lost to you! Come on, try again if you dare!"

The demon roared and struggled to regain its limbs.

But then he found himself shrouded in shadow.

After seeing Xia Xi's face clearly, the evil spirit realized that his companions had all been killed, and his eyes finally began to show panic.

However, before he could speak...

The cold light of the Nichirin Blade had completely enveloped it.

If you're bad at it, you should practice, stop chattering away.

What's the use of having a higher value than a persimmon? Don't you understand what a noble operation like multiplication is?

[Proficiency +25]

【Wind Breathing LV.3 (263/2000)】

Seeing that there were no more demons standing on the field, the other swordsmen finally relaxed.

They all collapsed to the ground.

"They survived..."

"A true survivor, a true survivor..."

"This guy is amazing..."

Shizi also came closer and whispered in Xia Xi's ear, "Now, all the swordsmen of your generation owe you a huge favor."

My ears felt a little itchy from the gentle breath.

The boy turned to look at the oath: "What good is this favor?"

Shiko rolled her eyes at him, then stroked her chin and pondered seriously: "As for Xia Xi-kun, perhaps we could ask them for advice on other breathing techniques?"

Oh?

Xia Xi then became interested, walked up to a slightly thin swordsman, and extended his right hand.

"Jiu Che Xia Xi, shall we get to know each other?"

"Huh?" The swordsman grasped the hand somewhat blankly, then was pulled up by the other: "My name is Shota Aida. Um, thank you for saving us."

"If you want to repay me, rest up and show me a couple of Fire Breathing techniques."

"Ugh?!"

Shota silently added another label to the boy in front of him: "weird guy".

A strange guy who is both powerful and straightforward.

Before he could answer, Xia Xi looked behind him.

"There's still one survivor."

[Rust-Eating Pill? ? ?] [Energy Level: 49 (Constitution: 25 Skill: 19 Mind: 5)] [Vampire...]

In the shadow of the tree trunk, a gaunt, masked cannibal crouched in a corner, silently watching the crowd.

The aura wasn't strong, but it was somewhat eerie.

Instead of running away after seeing his comrades killed, he seemed eager to try again.

Isn't its attribute even weaker than that ghost from before?

Almost at the same time Xia Xi spoke, Shi Zi beside her made his move.

Breathing of Water

First Form: Water Slash

Although the water flow effect was not visible, a sharp slash had already landed on the opponent's left arm.

Success!

Just as Shi Zi thought this, he immediately realized that the force coming from the hilt of the sword was not quite right.

He looked at the Nichirin Blade in his hand.

The blade, which was originally quite sharp, is now only half intact.

The cross-section was covered with jagged, dark brown rust.

The knife broke?!

"You don't actually think you've succeeded, do you?"

The demon looked at the young swordswoman so close to him, a twisted expression of excitement on its face.

Taking advantage of the moment when Shi Zi was stunned, he swung his claws down.

Blood splattered everywhere.

What was severed was not the head of the oath, but its arm.

And the other half of the Nichirin Blade that flew up.

It's Xia Xi.

They arrived just in time to sever his arm in the critical moment.

However, his Nichirin Blade, like Osako's, broke due to sudden rust stains.

Xia Xi raised an eyebrow.

This is definitely not a problem with the knife.

My Nichirin Blade isn't exactly brand new, but it's a long way from being rusty and broken.

If it's not the knife that's the problem, then it must be this ghost in front of us.

"Oh? Did you realize it now?"

Despite being extremely thin, he laughed with an arrogant air.

"But so what if you realize it now?"

"I can be reborn countless times, but you only have one knife."

The severed arm, which was still bleeding profusely, had begun to sprout new flesh and was recovering at a visible speed.

But in Xia Xi's hand, all that remained was a broken sword.

Chapter 10 Swords and blades are not such inconvenient things.

It's called Rust-Eating Pill.

It's not among the strongest in this sealed-off mountain forest; at least four or five evil spirits could lord it over it.

But now, those most arrogant ghosts have all turned into waste in the ground.

But it's still standing here perfectly fine.

They even dared to appear in front of the Demon Slayer Corps members without any restraint.

What it relies on is its special ability.

Blood Demon Art: Corrosion

This special ability was granted by the blood of Muzan Kibutsuji, the creator of demons, and evolved and developed as demons devoured humans and grew stronger.

It can rust away most metals instantly.

However, this only applies to metals.

It has no special effect on other evil spirits or humans.

But for these swordsmen wielding Nichirin Blades, it's a completely different story.

If he wants to.

The moment the strike hits him, it can quickly corrode and rust away.

A swordsman who has lost his Nichirin Blade.

What's the difference between it and a kitten without claws and teeth?

"Eat you all, then find a chance to escape. I believe that lord will definitely make me one of the Twelve Demon Moons!"

"My abilities are naturally the nemesis of you sword-wielding brats."

It lunged forward suddenly.

For a moment, Xia Xi was forced to protect Shi Zi and dodge several steps to the left and right.

"So, you're not even a cadre in the first place?" Xia Xi asked tentatively. "And who is that 'Lord'?"