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System Error: The Hero’s Manual Is Using My Past Life Data

Prince_yadav_7819
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Synopsis
After defeating the Demon Lord in his first life, Arin Valerian wished to understand every path of power. The wish forced him to live many lifetimes mastering swordsmanship, magic, alchemy, spirits, and more, eventually creating the ultimate system—Origin Arts. Reborn once again, Arin only wants a peaceful life as a wandering traveler. But a mysterious Instruction Manual System begins restoring fragments of his past powers while revealing fate, hidden talents, and future events. As Arin casually creates new techniques and alters destiny itself, powerful factions, regressors, and beings from other worlds begin to notice. The man who forgot his legend may soon reshape the fate of countless worlds.
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Chapter 1 - The Wanderer Who Forgot His Own Legend

The sky above the plains was an endless vault, a deep cerulean canvas brushed with wisps of drifting white. Below, a restless breeze combed through the tall grass, turning the landscape into a rippling, golden ocean.

On a lonely ridge overlooking the rutted trade road, a man stood in silence.

In this life, his name was Arin Valerian.

To a passing merchant, he was unremarkable—just another traveler in a weathered dark cloak, a notched sword resting loosely at his hip, and messy black hair dancing in the wind. But if a keen observer looked closer—truly looked—they would feel a phantom chill settle against their skin.

Arin didn't just stand on that hill; he seemed rooted to it. He possessed the terrifying stillness of a mountain that had watched empires crumble into dust.

His eyes were the strangest part. They weren't the eyes of a young wanderer. They were calm—far too calm—scanning the horizon with the weary patience of someone who had seen every sunset since the dawn of time.

Arin didn't feel like a mountain, though. He just felt tired.

It wasn't the simple fatigue of a day's march. It was a bone-deep, soul-weary exhaustion—the kind earned by a man who had lived too many lives, bled in too many wars, and died more times than he cared to count.

He closed his eyes, letting the warmth of the sun soak into his skin. The scent of wild clover drifted on the air. For one heartbeat, it was peaceful.

Then, reality fractured.

A spark of neon-blue light hissed into existence, coalescing into a translucent floating screen.

[Instruction Manual System Activated]

Analyzing Subject… Name: Arin Valerian

Status: Reincarnated Individual

Evaluating Potential…

The screen flickered violently, the blue light bleeding into a warning crimson. The text distorted, scrolling at a nauseating speed before freezing.

ERROR. ERROR. ERROR.

[System Notice] Evaluation Impossible. Subject exceeds measurable parameters. Switching to Observation Mode.

Arin stared at the hovering text. He let out a long, heavy sigh.

"Of course," he muttered. "Not even a quiet hilltop is sacred anymore."

Jagged fragments of memory stirred in his mind. They weren't memories yet—just broken shards. A sky choked with black fire. A legendary blade shattering like glass. A demonic king, towering and terrible, kneeling in the dirt before him.

Arin rubbed his temples. "Right. I remember that one."

His first life. He had been a boy from Earth, naive and brimming with a misplaced sense of justice. The "Hero." The kingdom had polished him up, called him a savior, and used him as a hollow point bullet aimed at the heart of the world's problems.

For ten years, he had been their weapon. He had won, eventually. The gods had rewarded him with the SSS-Rank Wish Stone. And Arin, young and hungry for meaning, had made a wish that would become his cage:

"Let me understand every path of power."

The gods, in their twisted irony, had granted it. He didn't receive a library of books; he was forced to live the lessons.

Life after life. One as a Sword Saint. Another as a forbidden Archmage. He had been a spearman, a king, an alchemist, and a beast-tamer. In his final past life, he had done the impossible: he merged every mastered discipline into a single, terrifying apex.

The Origin Arts. The source code of power itself.

He thought he had earned a final rest. Yet here he was, staring at a status bar.

"Does being a legend not come with a retirement plan?" he asked the empty air.

[Memory Fragment Detected] Past Life: Sword Saint

Synchronization: 3%

Ability Recovered: Basic Sword Intent

A spark ignited in his mind. It felt like a rusted lock finally clicking into place. The phantom weight of a blade, the exact density of the air, the way muscle should coil before a strike—it all flooded back.

"Slow recovery," Arin mused, exhaling slowly. "Probably for the best. I'd rather my brain didn't liquefy under the weight of a thousand years."

He looked down at the road. It was a thin brown scar across the green earth. Somewhere down there were cities, politics, and the inevitable headache of human ambition.

"I've saved the world enough," Arin said firmly. "Not this time. This time, I'm just a guy taking a walk."

The System flickered.

[Fate Evaluation Triggered] Scanning Nearby Individuals…

Name: Roderick Hale

Potential: C-Rank

Future Event: Death by bandit ambush in 5 minutes.

Arin's shoulders slumped. He looked toward the treeline. He didn't need the System to tell him they were there; he could hear their jagged breathing and smell the tang of unwashed iron.

"You've got to be kidding me," he groaned.

He started walking down the hill. As he reached the roadside, a nervous guard on horseback spotted him.

"Hey! You!" the guard shouted, his voice cracking. "Turn back! The pass is crawled with—!"

"Bandits?" Arin interrupted, his pace never wavering.

The guard blinked. "How did you—"

Arin didn't answer. He stopped and turned his gaze toward the woods. He didn't draw his sword. He didn't even take a stance. He simply took one deliberate step toward the trees and let a microscopic fragment of his "Origin" leak out.

The world went dead silent. The birds stopped mid-chirp. The wind seemed to hold its breath.

Deep in the brush, eighteen men suddenly felt their hearts stop. To them, the man on the road was no longer a traveler. He was an ancient, cosmic predator—a force of nature that had existed before the first star was born.

One bandit dropped his axe, his knees hitting the dirt. "What... what is that?" he whimpered, his lungs refusing to pull air.

On the road, the guard was trembling, his horse nearly collapsing in terror. Then, as quickly as it came, the pressure evaporated.

Arin scratched the back of his head. "Oops. A bit much, maybe."

[Aura Fluctuation Detected] Effect: Ancient Predator Presence

Status: Hostiles routed by Fear Response.

The guard stared at Arin, his mouth agape. "W-who are you?"

Arin gave him a tired, lopsided smile. "Just a wanderer."

He continued down the road, heading toward the forest. He wanted a quiet life, but even wanderers had to clear the path sometimes.

High above, hidden in the System's core protocols, a final line of text pulsed with a golden light.

[Hidden Protocol Activated] Subject Identified: Origin Arts Creator

Observation Priority: Absolute

The man who wanted to be forgotten had already begun to reshape the world. The legend of the Origin Wanderer had begun.