Isekai Adventure in the Dimensional Cube

"Resolve us?"

Upon hearing Reiger's words, the ghosts exchanged glances initially and then all burst into laughter, excluding Sekido and Aizetsu.

"I say, do you even understand the situation at hand?" Daki was the first to mock, saying, "Although you're not bad looking, aren't your thoughts a bit too beautiful?"

"Interesting, that statement really is amusing," Karaku even clapped his hands, saying, "Facing three Upper Rank demons, and a mere human dares to make such grandiose statements, how entertaining."

Meanwhile, Urogi, flying mid-air, simply burst out laughing and spoke to Reiger.

"I know you, Tsukiguni Yoriichi, you decapitated Akaza not long ago, didn't you? So, do you think that since you could defeat even the Upper Rank Three, you could also easily win against us, who rank below him?"

Urogi spoke with a chuckle.

"If that's truly what you think, then it's indeed quite amusing."

"Indeed, purely in terms of strength, Akaza is above any of us present. If you could defeat him, naturally, you could defeat us too."

"But not to mention you are now facing not one, but three Upper Ranks, even talking about whether you can resolve us, that's also impossible, you know?"

Urogi had scarcely finished speaking when Sekido and Aizetsu spoke up.

"Do you think we are like Akaza, almost dying from being decapitated?" Sekido, clutching his staff, glared at Reiger and said, "To entertain such a naive idea, it's truly infuriating."

"If we only compare survival abilities, whether it's us, Ubuyashiki Kagaya, or even Gyuutarou and Daki, we are all superior to Akaza." Aizetsu shook his head and sighed, "Although Ubuyashiki almost got killed by you, you cannot kill us, and not being able to kill us, you, a mere human, will sooner or later be killed by us. Not recognizing this reality is truly too sad."

Upon hearing the ridicule of the ghosts present, both Ubuyashiki Kagaya and Rengoku Kyoujurou felt a heaviness in their hearts.

Reiger also knew that these ghosts could indeed confidently make such statements.

Purely in terms of survival abilities, Akaza indeed couldn't compare to these three Upper Ranks.

Let alone Ubuyashiki, he almost got decapitated by Reiger just recently, but generally speaking, Ubuyashiki, whose scales are even harder than diamonds, even if someone hit his head with a Sun Wheel Blade, he could snap the blade with the back of his head, not to mention he could also shrink into his urn, instantly moving to another urn, making him unkillable by most who are stronger than him.

Gyuutarou and Daki were the same, though both were Upper Rank Six and ranked the lowest among the Upper Ranks, particularly Daki, whose strength wasn't truly at Upper Rank level, barely stronger than a Lower Rank, but being twin demons who co-existed, merely decapitating one wouldn't kill them. Only by beheading both at the same time could one kill this Upper Rank Six.

The Splitting Four Demons don't even need to be mentioned. Not only can they not die after being decapitated, but the more they are attacked, they can become even stronger, will multiply even more, in terms of survival ability, neither Upper Rank Five Ubuyashiki nor Upper Rank Six Gyuutarou and Daki can compare to him.

In terms of strength, they may not compare to Akaza, but in terms of survival abilities, Akaza truly doesn't measure up to them.

Of course, the current Akaza seems to have also made a breakthrough, no longer dying after being decapitated, perhaps now his survival skills are no weaker than the Upper Ranks present, potentially even stronger.

But at least, before this, Akaza compared to these three Upper Ranks, was still the more "fragile" type, as long as one's strength could overpower him, that would be enough to kill him.

In contrast to these three Upper Rank demons, even if one's strength overwhelmed them, they would not die.

And just as they said, as long as they do not die and the delay continues, they will be the victors.

This is the arrogance of a demon.

"We do not tire."

"Our lives are infinite."

"Even if wounded, we will regenerate."

"Fragile humans simply cannot win against us in the dark of night."

"Sekido, Aizetsu, Karaku, Urogi," the four demons spoke in turn, their words laden with a demon's sense of superiority and arrogance.

And with them having said that, not to mention Daki whose mind clearly wasn't as sharp.

"In this world, no human can fight against multiple Upper Ranks, let alone outmatch them." Daki, tilting her head and grinning, said, "Although I do not know why Muzan places such high regard on you, if you think beating the Upper Rank Three means you can look down on others, then you're simply a fool."

"Shoo, shoo, shoo."

Perhaps buoyed by the words of his companions, Ubuyashiki, covered in burns and wounds, also struggled to get up, emitting an unpleasant laugh.

"That's right, merely a human, it's impossible to win against three Upper Ranks; we can simply drag it out and exhaust you to death before the sunrise, leaving you as a corpse dead from exhaustion."

As Ubuyashiki's words ended, Gyuutarou also spoke as the final speaker.

"…Looking at you, throughout your previous life, you were probably always like this, surrounded by people with high expectations, everyone expecting something from you, always watching you, allowing you to lead a smooth and successful life, right?" Gyuutarou scratched his head, grabbed his scalp and stared at Reiger with a lifeless look, saying, "So nice, so nice, but what a shame, tonight you will die here."

The so-called exchange of hostilities could be said to describe the situation Reiger faced at this moment.

Four Splitting Demons, two Twin Demons, and one Urn Demon, a total of seven demons were mocking Reiger, laughing at his words, looking at him as if they were looking at a dead man.

Rengoku Kyoujurou was silent, gripping his blade, and took a step forward, as if he wanted to fight shoulder to shoulder with Reiger.

Kochou Shinobu's eyes slightly flickered, her gaze refocusing, struggling to stand up from the ground.

Ubuyashiki Kagaya said nothing, just looked at the figure of Reiger, watching as he alone faced the seven powerful Upper Rank demons.

In such a setup, Reiger moved.

He walked step by step towards the group of Upper Rank demons, his expression serene, appearing almost defenseless, resembling a brave warrior about to face his death.

However, as Reiger approached, for some reason, a shiver of coldness rippled through the hearts of the Upper Rank demons.

In contrast to this chill was a terrifying heat.

Reiger's body emitted high temperatures, causing the air around him to distort slightly, and everywhere he stepped left a charred footprint, making all the demons feel a sudden heat enveloping them.

Chilly hearts, heated bodies—the alternation of hot and cold was so intense that even the optimistic Karaku and Urogi couldn't muster a smile, and Daki unconsciously took a step back.

"Don't, don't be too arrogant!"

Ultimately, it was Daki who couldn't withstand this silent pressure any longer, causing her to shout out loud.

Suddenly, the ribbons around Daki burst into action, transforming into blades like steel knives, attacking Reiger like serpents, while slashing through the air.

"Blood Demon Technique: Circular Slash Rotation Flying Blood Scythe!"

Seeing his sister take the initiative, Gyuutarou clicked his tongue, swung his scythes, and shot out countless blood-red slashes that soared through the air like air blades, aiming for Reiger.

This was Gyuutarou's Blood Demon Technique, which allowed him to turn his blood into razor-thin blades and shoot them out. These blades were not only powerful enough to slice through the earth, but they were also poisonous. Once launched, he could change their trajectory according to his will, or even coil them around his hands, making them a versatile ability suitable for both close and long-range combat.

"Blood Demon Technique: Fierce Cry!"

"Blood Demon Technique: Thunder Kill!"

"Blood Demon Technique: Sharp Sting!"

"Blood Demon Technique: Strong Gale!"

The "Four Emotions" demons also launched their attacks, each deploying their own Blood Demon Technique.

Urogi opened his mouth mid-air, releasing a destructive sonic boom that violently shook the air, blasting towards Reiger.

Sekido struck his tin staff, causing torrents of wild lightning to burst forth, transforming into a sky-high thunder crackling through the courtyard.

Aizetsu thrust his crisscross-patterned spear, sending shockwaves that transformed into spear-like attacks flying through the air.

Karaku swung his round fan, turning the fierce wind into a massive pressure air mass that swept across the land and enveloped Reiger.

The attacks from the four doppelgänger demons were tremendously fierce, including Gyuutarou's Circular Slash Rotation. As they bombarded Reiger, they plowed, flipped, destroyed, and thoroughly devastated the earth, drawing countless debris and dust storms into the fray.

The entire Ubuyashiki residence was suddenly like a natural disaster had struck, with lightning streaking across, fierce winds wreaking havoc, and shockwaves, sound waves, and bloody blades wildly dancing around, lifting the roofs off the houses and shattering the walls bit by bit, swallowing Daki's ribbons within it.

"My lord!"

Rengoku Kyoujurou, witnessing this cataclysmic scene, didn't have time to think and immediately rushed to protect Ubuyashiki Kagaya.

"...…!?"

Kochou Shinobu could only protect herself, crouching on the ground, covering her head, before being blown away.

In this tempest-like onslaught of Blood Demon Techniques, humans indeed seemed insignificant—even swordsmen esteemed as pillars of the Demon Slayer Corps felt this way.

In the midst of such a barrage, Yoriichi's attacks seemed hardly noticeable.

"Blood Demon Technique: Array Killing Fish Scale!"

Suddenly, Yoriichi was seen leaping at high speeds through the disaster-like scene, using his slick scales to make his movements unpredictable as he attacked in Reiger's direction.

He no longer made impressively loud attacks but instead hid under the cover of the disaster-like barrage, reaching out both hands towards Reiger.

For his hands were capable of turning anything they touched into fish.

This was Yoriichi's hidden killer move.

Reiger was simultaneously confronted with the killer moves of the seven upper-rank demons and was instantly swallowed up.

"We won!"

All the demons saw this happen and were convinced of this fact.

———Until a blaze of fire appeared.

It was a spectacular blaze of fire.

Like a fire dragon, it first peeked through the calamitous scene before dancing through the air at incredible speeds, cutting through space and rapidly traversing the courtyard.

The malevolent demons only felt a sudden burst of sparks before them, then the fire dragon had already danced around their bodies, appearing to playfully circle them, leaving a dazzling trail in the devastated courtyard.

After a while, Reiger appeared in the midst of the firelight, transformed into the head of a fire dragon.

He stopped his swirling motion, arriving behind the group of demons, his black blade trailing flames, causing the fire dragon dancing across the courtyard to slowly dissipate in the air.

Everything, in that second, fell into silence.

"Sun Breathing, Eleventh Form..."

Reiger's voice then lightly resonated.

"Corona Dragon's Dance."

As his voice trailed off, Reiger sheathed his sword.

"Pfft—"

One by one, their heads flew into the air, blood sprayed the scene.