The battle was about to begin. Tanjiro, Nezuko, Inosuke, and Zenitsu stood alongside the Hashira, their eyes set on the looming Infinity Castle. This was the ultimate fight against Muzan and the Upper Moons.

The resurrected Rengoku and Yoriichi joined them, their presence bringing a sense of hope and determination. They were ready to fight to the end.

The battle began with a deafening clash. The warriors fought with unmatched skill and strength, facing off against the powerful Upper Moons.

Tanjiro and Nezuko fought side by side, their sibling bond strengthening their resolve. Nezuko's demon blood art complemented Tanjiro's water breathing technique perfectly.

Meanwhile, Inosuke and Zenitsu formed their own formidable duo. Inosuke's wild beast breathing style mixed with Zenitsu's precise thunderclap flash was a sight to behold.

Rengoku, the Flame Hashira, and Yoriichi, the original Sun Breather, fought with an intensity that could rival the sun itself. The heat of their battle was palpable.

Despite their combined might, the Upper Moons proved to be formidable adversaries. The battle was fierce, with neither side willing to back down.

The Hashira demonstrated their tremendous power and skill. Their unique breathing styles resonated throughout the castle, echoing with the sheer force of their will.

Nezuko's blood demon art unleashed a flurry of pink flames, while Tanjiro's water breathing created a whirlpool of attacks against their foes.

Zenitsu's thunderclap flash was a streak of bright light, while Inosuke's beast breathing was a wild storm. Their combined attacks were a sight to behold.

Despite the brutal battle, no one was willing to surrender. The resolve to defeat Muzan and the Upper Moons was unwavering. They were fighting for their lives, and the lives of those they had lost.

The intensity of the battle escalated as Muzan entered the fray. His presence was overwhelming, his power oppressive. Yet, the warriors stood firm, ready to face him.

The fight against Muzan was fierce. His strength was immense, but so was the resolve of the warriors. They would not let him win.

The battle reached a critical point. Muzan was weakening, but so were the warriors. Their strength was waning, but their spirit was unbroken.

Rengoku and Yoriichi, with their burning determination, pushed the warriors forward. Their leadership and strength were invaluable in the face of such adversity.

Tanjiro and Nezuko, the siblings united by blood and battle, fought with all their might. Their bond and determination were a beacon of hope.

Inosuke and Zenitsu, the unlikely duo, surprised everyone with their strength and determination. They fought bravely, refusing to back down.

The Hashira, with their unique breathing styles, fought fiercely. They were the backbone of the team, their strength and skill unmatched.

The battle raged on, with neither side willing to back down. The castle echoed with the sounds of clashing swords and roaring battle cries.

Despite the odds, the warriors did not waver. Their determination was unyielding, their resolve unwavering. They were fighting for their lives, and the lives of those they had lost.

The battle reached its climax. Muzan was weakening, the warriors pushing him to his limits. The end was in sight, but victory was far from certain.

The warriors gave it their all, their attacks relentless. The castle shook under the force of their attacks, their determination echoing through its halls.

Muzan, despite his immense strength, was faltering. The warriors, with their combined might and unwavering resolve, were pushing him to his limits.

The end of the battle was near. The warriors, despite their exhaustion, did not let up. They fought with all their might, determined to end Muzan's reign of terror.

With a final, combined attack, the warriors struck Muzan. The castle shook with the force of their attack, the echo of their victory resonating through its halls.

Muzan, defeated, fell to the ground. The warriors, exhausted but victorious, stood tall. They had won. The battle for the Infinity Castle was over.

As the dust settled, the warriors looked around. They had survived. They had won. The victory was theirs, but it had come at a heavy price.

Despite the heavy toll, they were relieved. The battle was over, and they had emerged victorious. It was a victory not just for them, but for all those who had lost their lives to Muzan's reign.

The Infinity Castle, once a symbol of Muzan's terror, now stood as a testament to their victory. The battle was over, but the memories would remain.

The warriors, standing tall amidst the ruins, looked towards the future. They had won the battle, but the war was far from over. They would continue to fight, for the sake of those they had lost.

The battle for the Infinity Castle was a testament to their strength, their courage, and their resolve. They had fought bravely, and they had won. But their journey was far from over.

As the sun rose, casting a warm light over the castle ruins, the warriors stood tall. They had fought, they had won, and they would continue to fight. The battle for the Infinity Castle had ended, but their journey was far from over.

The warriors, their spirits unbroken, looked towards the future with determination. They had won the battle, but the war was far from over. Their journey was far from over.

As they walked away from the ruins of the castle, they carried with them the memories of the battle, the victory, and the losses. Their journey would continue, as would their fight against evil.

The Battle for Infinity Castle was a victory, but it was also a reminder of the cost of such victories. The warriors, their spirits unbroken, would continue to fight, for the sake of a peaceful world.