Ubuyashiki stood at the edge of the battlefield, his quiet yet commanding presence instantly drawing the attention of everyone—demon and slayer alike. Despite his frail body, his aura was calm, his eyes sharp with determination as they locked onto Muzan. The Demon King, towering over the group with his overwhelming presence, narrowed his blood-red eyes in response.
"You think a weak, dying human like you can stop me?" Muzan sneered, his voice dripping with disdain. "You've led these children to their deaths, Ubuyashiki."
Ubuyashiki remained unfazed, his gaze steady. "Your arrogance blinds you, Muzan," he said softly, but his voice carried across the battlefield. "These warriors have fought you bravely, and their courage has already weakened you."
Tanjiro, still reeling from Muzan's earlier attack, felt his heart steady at the sound of Ubuyashiki's voice. There was something about his presence—something that gave him strength. Even with their backs against the wall, he couldn't give up. Not while Ubuyashiki believed in them.
Nezuko, crouched beside Tanjiro, growled, her red eyes flicking toward Muzan with renewed fury. Despite the toll the battle had taken on her, her resolve burned brighter than ever.
Ubuyashiki turned his gaze to the group—Tanjiro, Gon, Killua, Rengoku, Aru, and Nezuko—and gave a soft smile. "You've done well," he said. "You've pushed Muzan to a point he hasn't reached in over a thousand years. But now, the time has come to finish this."
Aru's grin widened, his wild eyes gleaming with excitement. "So, what's the plan, old man?" he asked, hoisting his massive sword onto his shoulder. "Because I've been waiting to cut that smug demon down."
Ubuyashiki's expression remained serene. "Muzan's strength lies not only in his regeneration, but in his connection to the demons he has created," he explained. "If we can sever that connection, we can stop his regeneration. It is the key to his immortality."
Killua's silver eyes flickered with understanding. "We tried that earlier," he said, his voice sharp. "But it wasn't enough."
Gon nodded, clenching his fists as his nen flared. "We'll do whatever it takes to stop him!"
Muzan's cold laughter filled the air once again. "You think you've figured me out?" he mocked. "You children are nothing but ants beneath my feet."
But Ubuyashiki remained calm. "Muzan, you've forgotten what it means to be human. And that will be your downfall."
Suddenly, Ubuyashiki raised a hand, and from the shadows of the battlefield, the remaining Hashira appeared—Giyu Tomioka, the Water Hashira; Shinobu Kocho, the Insect Hashira; and Tengen Uzui, the Sound Hashira. Their arrival was swift, their presence adding an undeniable weight to the battlefield.
Shinobu's smile, though as serene as ever, had a sharp edge to it. "It's time to put an end to this, isn't it?"
Tengen grinned, his dual Nichirin Blades flashing in the dim light. "This is going to be flashy."
Giyu, his face stoic as always, stepped forward, his hand gripping the hilt of his sword. "We fight together."
Muzan's eyes narrowed as he regarded the Hashira with disdain. "You think a few more swords will make a difference? I will crush you all."
Ubuyashiki's soft voice cut through Muzan's threat. "They're not alone, Muzan."
The Plan Unfolds
As the Hashira took their positions around Muzan, the plan became clear. They were forming a circle around the Demon King, cutting off his escape and limiting his movements. Muzan's eyes flicked between them, his expression darkening as he realized what they were attempting to do.
"You think trapping me will change anything?" Muzan growled, his claws extending as his aura flared. "I'll tear through you all!"
But Ubuyashiki raised his hand, and the Hashira moved in unison.
"Now!"
Tengen Uzui was the first to strike, his blades flashing with brilliant speed as he launched himself at Muzan. "Sound Breathing, Fifth Form: String Performance!" His dual swords moved in perfect harmony, creating a whirlwind of flashing steel and sound as he closed in on Muzan.
Muzan snarled, his form twisting as he dodged Tengen's attack, but the distraction gave Shinobu her opening. With inhuman speed, she darted forward, her blade coated in lethal poison. "Insect Breathing, Dance of the Dragonfly: Compound Eye Hexagon!" Her strikes came from every angle, aiming to inject Muzan with her deadly venom.
Muzan roared in frustration as he deflected Shinobu's attacks, but Giyu Tomioka was already there, his blade moving with the calm precision of flowing water. "Water Breathing, Eleventh Form: Dead Calm!" The air around Giyu stilled, and his sword cut through the chaos with a single, fluid strike aimed at Muzan's chest.
For the first time in the battle, Muzan was forced onto the defensive. The Hashira's coordinated attacks, along with the strategic positioning, were cutting off his ability to regenerate as quickly.
But even as the attacks came from every direction, Muzan's power flared, his body twisting and contorting unnaturally to avoid the most lethal blows. "You think this will stop me?" Muzan spat, his voice filled with fury. "I am eternal!"
Muzan's Wrath Unleashed
With a roar of pure rage, Muzan's body exploded with dark energy, sending shockwaves through the battlefield. The Hashira, though skilled and powerful, were knocked back by the sheer force of Muzan's power. The ground cracked beneath their feet, and the air itself seemed to shudder under the weight of his fury.
"You will all die!" Muzan screamed, his voice filled with unholy wrath. His tendrils lashed out like whips, aiming for the throats of the nearest fighters.
But before Muzan's attack could land, Rengoku charged forward, flames roaring around him as he intercepted the strike. "Flame Breathing, Ninth Form: Rengoku!" His sword met Muzan's tendrils head-on, the clash of fire and darkness sending sparks into the air.
Muzan's eyes flashed with fury as Rengoku pushed him back, the Flame Hashira's determination unwavering. "You will not defeat us!" Rengoku shouted, his voice filled with the same fiery passion that had carried him through every battle.
Tanjiro, seeing the opportunity, activated Hinokami Kagura, his sword blazing with fiery energy as he darted forward. "Hinokami Kagura, Dragon Sun Halo Head Dance!" His blade slashed through the air, aiming for Muzan's heart.
But Muzan, always one step ahead, twisted his body to avoid the strike. His claws shot out toward Tanjiro, aiming for a killing blow.
Before Muzan's attack could land, Nezuko appeared in a blur of speed, her claws meeting Muzan's with a feral snarl. Her strength, fueled by her love for her brother, was enough to deflect the deadly strike, but Muzan's power still sent her flying across the battlefield.
"Nezuko!" Tanjiro cried out, his heart racing as he watched his sister crash into the ground.
But Nezuko rose to her feet, her eyes blazing with demonic fury. Despite the blood trickling down her arm, she refused to back down. Her body burned with resolve, her power growing with every passing second.
The Final Push
"We're running out of time," Killua muttered, his eyes narrowing as he took in the chaotic battlefield. "Muzan's power is off the charts."
Gon, his fists glowing with nen, nodded grimly. "We need to give everything we've got. If we can't finish this now…"
Tanjiro, his breathing ragged but steady, stood tall, his sword still ignited with the flames of Hinokami Kagura. "This is our last chance," he said quietly. "We have to sever Muzan's connection to his power."
Ubuyashiki, standing at the edge of the battlefield, gave a single nod. "This is it. Together, you can bring an end to this nightmare."
With that, the group surged forward for one final push. Rengoku's flames roared to life, Tengen's blades flashed, Shinobu's venom-coated strikes darted toward Muzan, and Giyu's water-slicked blade moved with deadly precision.
Gon and Killua flanked Muzan from either side, their nen-infused attacks slamming into him with relentless force. "Jajanken: Rock!" Gon's fist connected with Muzan's chest, sending cracks spidering through his body.
Killua zipped around Muzan, his claws crackling with electricity. "Godspeed: Whirlwind!" His strikes were blindingly fast, targeting Muzan's weak points with surgical precision.
Muzan's regeneration faltered as the combined force of the attacks overwhelmed him. His body twisted and contorted, his form flickering as if struggling to maintain its shape.
"We're almost there!" Tanjiro shouted, his voice filled with hope.
But Muzan's eyes, though filled with fury, gleamed with a dark resolve. "I will not fall!" he roared, his power surging once more as his body began to stabilize.
The final battle was far from over, but the group's determination burned brighter than ever. Together, they would face the darkness, and together, they would bring an end to Muzan's reign.