HxH: I Will Be Supreme

Crunch, crunch!

Yasuhara didn't hesitate for even a moment. Right in front of Oboro, he began devouring the other three inheritors with savage hunger.

In the most primitive, bloody way imaginable, he tore into the flesh and blood of his former companions like a starving beast. The wet, grinding sounds of his consumption echoed through the night.

Oboro witnessed this harrowing display of will. Though the sight was utterly shocking, he couldn't help but feel a surge of respect for Teshimaga and the others. Their sacrifice and commitment were beyond anything he'd expected.

"You guys are incredible," he whispered, his voice barely audible above the carnage.

This was true will in action, the crucial moment of self-evolution he'd been waiting to see.

Witnessing such dedication had a raw impact, making everything crystal clear. Now, he truly understood the difference between inherited and personal will. There was something profoundly different about orchestrating and experiencing this drama firsthand rather than simply observing it from the detached perspective of a time traveler.

Oboro felt his own soul respond, thrumming with new energy. Witnessing such pure inherited will seemed to be transforming something fundamental within him.

His soul grew tougher and stronger than before.

Honestly, Oboro hadn't expected to see any real improvement through inherited will for at least a hundred years. After all, the seeds of any power system must be cultivated over time. They couldn't simply bear fruit overnight. Moreover, given that the Demon Slayer world was a relatively low-level dimension, he'd assumed the growth rate would be painfully slow.

Kawai Giyu had been a special case, a rare exception.

But now, another one was unfolding right before his eyes.

Whether it was Giyu or Yasuhara, they had both proven to be extraordinary students who had inherited his will and undergone dramatic mutations in this era. They had all benefited tremendously from inheriting his will.

Across from him, Yasuhara slowly raised his head after finishing his grisly meal. His face was smeared with filth and blood, and his body began to twist in unnatural ways. The overwhelming surge of power flowing through him was too much to process; normally, he could only release it in its most primal form.

His bloodthirsty eyes, beneath a gore-stained forehead, burned with savage ferocity as they locked onto Oboro.

"There's no need to wait any longer." Yasuhara's voice had changed, becoming darker and more menacing. "My Lord, I will set you free tonight."

"Your will and mine will both be fulfilled before dawn."

The words that came from his throat didn't sound like Yasuhara's anymore. Saliva dripped from his mouth as he grinned with terrifying malice.

After speaking, he threw back his head and released a long, agonized howl. The terrible sound waves triggered a series of explosive air bursts within a hundred-meter radius, shattering windows and cracking stone.

His body began expanding at a visible speed. His human hands and feet disappeared entirely as he transformed into a towering mountain of writhing flesh.

Looking at this massive, pulsating mass of blood and tissue that seemed capable of reshaping itself into different organs and limbs at will, Oboro was immediately reminded of Muzan.

These inheritors had only received fragments of his will. Most of their actual power still came from Muzan's cursed blood flowing through their veins.

Oboro's blood merely served to suppress Muzan's mental curse and provide psychological reinforcement, nothing more.

In future timelines, during the final battle between Muzan and the Demon Slayer Corps, Muzan pushed himself to the brink of death. This was the method he used to dramatically alter his body structure by increasing his blood and flesh mass.

Moreover, some of Muzan's signature techniques, especially when he slaughtered the Lower Moons in the Infinity Castle, involved attacking by transforming flesh and blood into writhing tentacles.

Yasuhara's current state was almost like a complete regression to that primal form.

"Cellular evolution," Oboro said, narrowing his eyes as he studied the transformation intently.

At that moment, due to the inherited will, his own blood, or the sudden absorption of uncontrollable power, Yasuhara's entire life form was undergoing a fundamental transformation. He seemed to have transcended being a demon in the traditional sense.

He was becoming something entirely new, a different species altogether.

Will, Oboro's blood, Muzan's blood, and the terrifying power absorbed in such a short time span

The three dead inheritors seemed to have left traces of their will embedded in their cells. Now, they were living on within Yasuhara's flesh and blood. These traces existed in perfect harmony with Yasuhara's soul, perhaps with just a touch of influence from the Blue Spider Lily.

This perfect opportunity, combined with multiple other factors, made this inheritor completely different from all the others.

Personal will drives people to grow, evolve, and ascend to the next dimension. Inherited will clearly had the same effect and wasn't any weaker.

Swish, swish, swish.

In the next instant, the flesh mountain erupted with hundreds of arms shooting out like ropes, all reaching desperately toward Oboro.

Vajra Finger.

Oboro bent his hands into eagle claws and unleashed a fighting technique he hadn't used in ages, slashing through the air in front of him.

Instantly, severed limbs went flying in every direction.

The devastating tearing force crushed every reaching arm and carved several bloody wounds three or four meters long across the mountain of flesh.

Moving like a phantom, Oboro flashed to the base of the meat mountain.

He bent his elbows and raised his arms, preparing to deliver a crushing blow.

However, he hadn't expected Yasuhara's new body to be able to respond to his lightning-fast movements after his transformation.

Before he could attack, the flesh in front of him split open into a massive maw that swallowed him whole in an instant.

After consuming Oboro, the mountain of flesh began to writhe and pulse. Countless eyes opened across its skin like blooming flowers.

Four distinct faces emerged simultaneously in the cardinal directions: up, down, left, and right.

They were the faces of the four inheritors, now part of this singular being.

"Ha ha ha ha!"

Numerous mouths materialized across its surface, erupting in shrill, maniacal laughter that echoed through the night.

Soon enough, however, that triumphant laughter transformed into howls of agony.

The entire mass of flesh began to emit rising clouds of superheated steam, as if someone trapped inside were generating the heat of a blast furnace.

The hard flesh and blood tissue softened and dissolved continuously. From a distance, the towering flesh mountain resembled a massive, melting scoop of red ice cream.

Everyone turned toward the spot where Oboro had been swallowed.

"We are saving the world! We're saving all the sick people, including you!" the voices cried out in unison. "We're saving you, too. You're sick, aren't you?"

"We are the practitioners of true will! Why won't you let us fulfill our sacred mission?!"

"Why?! WHY?!"

The roar came from all four inheritors' voices intertwined into one devastating sound.

Immediately afterward, the huge mountain of meat exploded like a bomb, splattering chunks of flesh across the landscape.

Due to his high body temperature, Oboro, surrounded by white-hot steam, stood in the same spot he'd been before, completely unharmed.

He lowered his raised fist with deliberate calm.

With a cold expression, he brushed off the pieces of flesh that had stuck to his clothes and skin.

Not far away, there was a single face lying on the ground.

It was Yasuhara's, and it was still intact.

At that moment, Yasuhara seemed to regain his original consciousness.

"I'm sorry, my lord," Yasuhara whispered, tears streaming down his face.

"We couldn't do it. We couldn't save you."

"I'm so sorry we disappointed you."

Yasuhara wept openly, his voice filled with genuine regret and frustration.

"It's okay." Oboro walked over to him and gently picked up the remnants of flesh, cradling them in his hands. His voice was surprisingly soft. "You did incredibly well. You found successors to carry on your will, didn't you? One day, the world will change because of what you started here."

"My lord, you must be in so much pain."

In Oboro's hands, Yasuhara's flesh was slowly decomposing and fading away, particle by particle.

Yasuhara looked up at Oboro with eyes full of genuine concern and heartbreak.

"The pain is only temporary," Oboro replied with a gentle smile.

"Goodbye now."

With that final whispered farewell, Yasuhara died, bringing his remarkable life to an end.

Although they were carrying out their inheritance, from their perspective, they were also genuinely trying to save Oboro, freeing him from his suffering and the painful karma that seemed to bind him to this world.

Their emotion and care had been absolutely real.

Due to the harsh historical background and customs of their era, most people in the Demon Slayer world had lived incredibly difficult lives from the Warring States period until the present. This constant struggle made their emotions purer and simpler, far less complicated than those in the Hunter x Hunter world. This simplicity alone made them far more compatible with the concept of an inherited will.

In the Demon Slayer world, cultivating and developing individual will was extremely difficult.

In other words, it was nearly impossible for one person to become an overwhelmingly powerful, transcendent individual on their own.

Muzan's death at the hands of a group of Demon Slayer Corps Pillars is perfect proof of this fundamental limitation.

After several long moments, Oboro turned around and called forth his system interface. He transformed some of the flesh that hadn't completely dissolved into resource cards.

He had gained something new, something valuable.

Through careful effort and planning, he had successfully created something in the Demon Slayer world that had never existed before.

This also meant that his new power system was finally beginning to take root and emerge into reality.