A combined Offense

The battlefield was eerily silent for a moment as the Hashira regrouped, their battered forms standing defiantly before Muzan. Despite the overwhelming odds, their spirits remained unbroken. The King of Demons loomed over them, his grotesque form pulsating with raw power, the mouths on his limbs snarling hungrily.

"Still standing? How utterly foolish," Muzan sneered, his plum-red eyes narrowing as he gazed down at them. "No matter how many times you rise, the outcome will remain the same."

Shinjuro Rengoku stepped forward, his fiery gaze locked onto Muzan. "If this is where we fall, then we'll take you down with us!" His blade ignited with a blazing inferno as he charged. "Flame Breathing, Ninth Form: Rengoku!" The ground quaked under the sheer heat of his attack as a massive, fiery dragon roared toward Muzan.

Mitsuri Kanroji followed, her movements as graceful as a dancer. "Love Breathing, Fifth Form: Swaying Love Wildclaw!" Her flexible blade curved and snapped like a whip, striking at Muzan's outstretched appendages with relentless precision.

Gyomei Himejima slammed his flail into the ground, the force shaking the crumbling remains of the Infinity Castle. "Stone Breathing, Seventh Form: Piercing Boulder Strike!" His massive weapon tore through the air, aiming directly for Muzan's core.

Sanemi Shinazugawa, his face twisted into a snarl, unleashed a whirlwind of attacks. "Wind Breathing, Seventh Form: Gale, Sudden Gusts!" The air around him howled, slicing through Muzan's grotesque mass with razor-sharp precision.

Obanai Iguro struck from the shadows, his Serpent Breathing weaving through Muzan's defenses. "Serpent Breathing, Sixth Form: Coil Choke!" His blade moved with snake-like agility, aiming for the weak points in Muzan's regenerating body.

Even Tengen Uzui, still recovering from previous battles, joined the fray with explosive flair. "Sound Breathing, Fifth Form: String Performance!" The air reverberated with the force of his attack, shaking Muzan's form.

For a brief moment, their combined assault seemed to overwhelm Muzan. Flames, wind, stone, and love entwined in a deadly dance, carving into the King of Demons. Muzan staggered, his grotesque form regenerating more slowly under the relentless onslaught.

But then he laughed. It was a cold, hollow sound that sent shivers down their spines.

"You think this is enough to stop me?" Muzan snarled. His form pulsated, the mouths on his limbs opening wide. In an instant, a deafening shockwave erupted from his body, the force of his Blood Demon Art rippling through the battlefield.

The Hashira were flung backward, their bodies crashing into the broken walls of the castle. The shockwave left deep scars on the ground, and the once-mighty warriors struggled to rise.

Mitsuri coughed, blood staining her lips. "He's... too strong."

Gyomei clutched his weapon, using it to steady himself. "We need... a new strategy."

Sanemi growled, wiping blood from his face. "Damn it! He's not giving us any time even to breathe!"

From the sidelines, Tanjiro Kamado clenched his fists. "They need our help. We can't just stand here anymore!" His voice was resolute, his spirit burning with determination.

Kanao, Inosuke, and Zenitsu nodded, their eyes reflecting the same fire. Together, they leapt into the fray, their movements swift and precise.

Tanjiro's blade gleamed in the dim light as he charged. "Sun Breathing, Fifth Form: Setting Sun Transformation!" His fiery slash illuminated the battlefield, striking Muzan with a force that made the Demon King momentarily falter.

Inosuke roared, his twin blades spinning in his hands. "Beast Breathing, Eighth Fang: Explosive Rush!" His wild, erratic movements were almost impossible to predict, and he landed several deep cuts on Muzan's limbs.

Zenitsu's form blurred as he moved with lightning speed. "Thunder Breathing, First Form: Thunderclap and Flash!" He struck Muzan's side with a resounding crack, the force of his attack leaving a visible dent.

Kanao's blade moved like a leaf in the wind. "Flower Breathing, Sixth Form: Whirling Peach!" Her strikes were elegant yet deadly, slicing through Muzan's defenses with precision.

Bell stood at a distance, his arms crossed as he observed the battle. His eyes gleamed with amusement and pride as he watched the younger generation fight with everything they had.

"They've come a long way," he murmured, a faint smile tugging at the corner of his lips. "It seems my training wasn't wasted after all."

Tanjiro's fiery determination, Zenitsu's blinding speed, Inosuke's raw ferocity, and Kanao's graceful precision—all were on full display. Bell couldn't help but feel a sense of satisfaction as he watched them challenge the King of Demons.

But he made no move to join the battle.

Gyomei, struggling to his feet, called out to Bell. "Why are you holding back? They need you!"

Bell shook his head, his expression unreadable. "They need this. They need to taste the bitterness of struggle, the sting of near defeat. Only then will they grow."

Sanemi growled from where he lay, his body battered but his spirit unbroken. "You're insane! You're letting them die!"

"No," Bell replied calmly. "I'm letting them learn. If they're to face the horrors of this world, they must stand on their own. They must become more than warriors—they must become legends."

Despite their valiant efforts, Tanjiro and his friends began to falter. Muzan's regeneration was relentless, and his Blood Demon Arts became even more vicious. Streams of acidic blood and whipping tendrils lashed out, forcing them to dodge and counterattack with everything they had.

Tanjiro gritted his teeth, his breathing labored. "We can't give up... not now!"

Zenitsu trembled, but his resolve held firm. "We've come too far to lose here!"

Inosuke roared, his wild eyes blazing. "I'll carve you up, you oversized freak!"

Kanao's usually calm expression was steeled with determination. "We'll find a way... we always do."

Muzan chuckled, his grotesque form towering over them. "Is this all you have? You're nothing but children playing at war."

His mocking laughter echoed through the battlefield as he launched another barrage of attacks, forcing the young warriors to their limits. Blood and sweat dripped from their bodies, but they refused to back down.

From the sidelines, Bell's smirk widened. "Good... very good. Show me what you're made of."

The battlefield was a crucible, forging the younger generation through fire and blood. Muzan's monstrous form loomed larger than life, but the unwavering resolve of the Demon Slayers burned like a beacon in the darkness. The true battle was just beginning, and Bell, ever the enigmatic mentor, watched with keen interest as the next chapter of their saga unfolded.