My Hero Academia: The Legacy of Lost Numbers

All For One sat high on his twisted throne, his gaze cold and calculating as he observed the heroes who had dared to enter his domain. His body was cloaked in dark energy, a testament to his immense power, and his aura seemed to permeate the very air around him.

Suddenly, Toshinori stepped forward, his form radiating with demonic energy as he unsheathed his Devil Sword, Midoriya. The blade gleamed menacingly, pulsating with an ominous aura that mirrored the chaos it was meant to oppose. His eyes locked onto All For One's, a burning determination behind them.

Toshinori:

*"I won't let you have Mundus's power. It will only bring chaos, destruction, and suffering! This stops now!"*

All For One's twisted smile widened, his dark laughter echoing through the chamber.

*"Chaos is the true power of the world. You cannot defeat me, Toshinori. Your petty resistance is futile."*

Izana, standing beside Toshinori, held his Angelic sword, its divine light contrasting against the darkness of All For One's domain.

*"You talk of chaos, but you only know destruction. You've gone too far!"*

Ken, his gigantic dragon form now shimmering with radiant energy, growled lowly, his eyes locked onto All For One with a primal intensity.

*"You've meddled with powers you can't control, and now you'll face the consequences!"*

Shoya, still in his Titan form, stomped forward, his immense strength shaking the ground beneath them.

*"Your reign ends here! No more experiments, no more manipulation!"*

All For One's gaze flickered between the gathered heroes, his confidence wavered as he realized the magnitude of the force against him. He stood up, his voice lowering into a more menacing tone.

*"You think you can destroy me? I've seen what power can do. You can't defeat what I've built. Chaos is inevitable."*

Toshinori raised Midoriya higher, the blade crackling with demonic energy.

*"Chaos is not power—it's destruction. And I'll put an end to you here and now."*

With a fierce charge, the combined forces of Toshinori, Izana, Ken, Shoya, and the others surged forward, their power overwhelming All For One's defenses. The battle erupted in a storm of light and darkness, clashing waves of energy illuminating the massive chamber as All For One fought to maintain his dominance. However, it was clear that his control over the chaos was slipping.

Deku, standing near Toshinori, prepared a final blow with One For All surging through him, the power pulsating across the battlefield.

Deku:

*"Your reign ends here, All For One! This world won't be yours to destroy!"*

The battlefield crackled with energy as All For One's monstrous form, empowered by the dark power of Mundus, towered over the heroes. His twisted aura surged with an intensity that threatened to engulf everything in its path. Each swing of his dark energy surged through the air, pushing back Toshinori, Izana, Ken, and Shoya with overwhelming force.

Toshinori:

"He's too strong! We need to find a way to seal him and Mundus's power before it consumes everything!"

Izana gritted his teeth, his Angelic sword glowing brightly in contrast to the oppressive darkness.

"We must act now. If we delay, we won't survive his assault much longer."

Ken, in his massive dragon form, roared as his scales shimmered with radiant energy.

"Let's use the spell! It's risky, but it's our only chance!"

Shoya, standing tall in his Titan form, clenched his fists as the ground trembled beneath him.

"We'll seal him away for eternity, no matter the cost!"

The four heroes locked eyes for a brief moment, their determination solidifying into an unbreakable bond. Together, they channeled their immense powers into a single, devastating spell—a ritual of divine and demonic forces fused in unity. The energy surged, creating a blinding light that pierced through the darkness surrounding All For One.

All For One roared in defiance, his form pulsating with monstrous energy, but he struggled to maintain control as the sealing spell took shape. His screams echoed through the battlefield as his power fought against the combined might of Toshinori, Izana, Ken, and Shoya.

Toshinori: "Now, finish it! Seal him away for good!"

With one final burst of energy, the spell sealed All For One and the overwhelming power of Mundus within a dimensional rift. The rift closed, trapping him in an eternal prison, leaving only the remnants of his dark influence behind.

As the final rift closed, sealing All For One for eternity, Toshinori, Izana, Ken, and Shoya collapsed onto their knees, their breathing heavy and ragged. The immense power they had summoned had drained them entirely, leaving them exhausted and frail.

Toshinori struggled to catch his breath, his demon form fading away into a more human-like state.

"That… took everything we had…" he gasped, his voice hoarse.

Izana, still kneeling beside him, managed a weak smile. His angelic aura dimmed, leaving only his human form behind.

"But it was worth it. He's sealed, and the world is safe… for now."

Ken shifted, his massive dragon form receding into his human shape. His breath was shallow, and his body trembled slightly.

"We'll recover. We've been through worse."

Shoya, exhausted yet determined, stood slowly, his Titan form giving way to his regular human self. He wiped sweat from his brow, still breathing hard.

"Just give us time… we'll be back stronger."

The battlefield around them was eerily silent, the energy of the sealing spell dissipating into nothingness. Karta and Adrean stepped forward, their calm expressions contrasting the heroes' wearied states.

Karta:

"You've done well, Lords. Rest now. The battle is won."

Adrean nodded, his voice calm yet firm.

"Your strength has sealed the darkness forever. You've earned this."

Toshinori smiled faintly as he rested his hand on the ground, struggling to rise fully.

"Thanks to you both. We couldn't have done it without you."

Izana added softly, his voice barely above a whisper.

"The world is safe… for now."

Ken and Shoya exchanged a glance, knowing full well that the fight was far from over. Despite the strain, they would rise again, their resolve unshaken, ready for whatever challenges lay ahead.

Deku, Bakugo, and Shoto stood proudly, their gazes fixed on the four exhausted but victorious warriors. Their expressions were a mix of admiration and relief, having witnessed the incredible power and dedication of their friends.

Deku stepped forward, his expression stern but filled with pride.

*"You did what none of us could alone. Sealing All For One and his chaos is no small feat. You've saved countless lives today."*

Bakugo crossed his arms, a fiery determination burning in his eyes.

*"Yeah, you guys are something else! You've taken on the impossible and crushed it. No one else could have done this!"*

Shoto, calm and collected, gave a small nod.

*"Together, you were unstoppable. It's inspiring to see how far you've come."*

Toshinori managed a weak smile, his breath still uneven.

*"Thanks to all of you. But it wasn't just us. You were there in spirit, and your support kept us strong."*

Izana leaned slightly against his sword, his expression thoughtful.

*"You've been by our sides, and that made the difference. We couldn't have done it without you."*

Ken, though still recovering, gave a respectful nod.

*"This victory belongs to all of us. Together, we are unstoppable."*

Shoya, with a quiet determination in his eyes, added,

*"And we'll continue to fight—no matter what comes next."*

Deku smiled warmly, his gaze flickering between his friends.

*"You've shown the true power of unity. The future looks brighter because of you."*

Bakugo gave a satisfied smirk.

*"Damn right. Let's rest for now, but when we come back, we'll be ready to keep this world safe."*

Shoto nodded in agreement.

*"And we'll be stronger because of you. Together, we're a force that can't be stopped."*

The four warriors, though weary, shared a bond stronger than ever before. Their combined strength had saved the world once again, and their unity ensured they would face any challenge together.