My Taming System Makes Me Overpowered

Before the name Vesper carried weight in the back alleys of the continent, before the Death Crows were etched into the feared folklore of the underworld, there was only a boy shivering in the wet, mud-slicked gutters of the Western Duchy.

He had no family name. No noble blood. No gold.

Like many born into the rotting underbelly of any Duke’s territory, Vesper was a stray—an orphaned kid scrambling for scraps in a world that devoured the weak without chewing. But unlike the magicless dregs who withered in the dark, Vesper possessed a subtle, volatile anomaly beneath his ribcage: a raw, unrefined Mana Core.

He didn’t know what it was called back then. He only knew that when he got scared, the shadows around his feet twisted. When he got angry, the air around his hands grew unnaturally cold.

On a bleak, rain-drenched morning in the lower market district, twelve-year-old Vesper made a mistake.

His stomach had been screaming for two days, a dull, gnawing pain that made his head light. Driven by desperation, he slipped past the wooden counter of a noble-chartered baker’s stall, his small, dirt-caked fingers snatching a warm, thick loaf of rye bread.

”Thief!” the baker roared, his heavy wooden paddle slamming down onto the counter. ”Catch that bloody brat!”

Vesper sprinted. His thin, worn leather boots slapped against the cobblestones, his heart hammer-posting against his ribs. Behind him, three armored enforcers belonging to the regional Duke’s faction gave chase, their heavy boots rattling the iron gates of the market square.

He darted down a narrow, trash-littered alleyway, but his foot caught on a jutting cobblestone. Vesper hit the ground hard, skinning his knees, the bread rolling into a muddy puddle.

”Got you, little leech,” one of the guards growled, unsheathing a heavy leather cosh.

Terror flared in Vesper’s chest. On pure instinct, he reached into that warm, pulsing knot beneath his ribs. A thin ripple of dark, smoky mana bled from his palms, wrapping around the ankles of the lead guard. The man tripped with a heavy clatter, his face smashing into the stone.

Vesper didn’t wait to see the outcome. He scrambled to his feet, sprinted toward the main trade thoroughfare, and spotted a massive, black-timbered merchant’s carriage pulling out of the district gates, bound for the outer territories.

Without thinking, Vesper lunged under the rear axle, pulling his small frame up onto the wooden undercarriage frame. He clung to the iron struts with white-knuckled grip, the carriage jolting violently as it breached the city gates, carrying him away from the guards, the mud, and the only life he had ever known.

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The journey took three agonizing days. When the carriage finally ground to a halt, Vesper dropped from the undercarriage, his muscles cramped and his lungs burning with dust.

He slipped out from underneath the wagon, wiped the grime from his eyes, and looked up.

He had arrived in Malgrath.

Back then, Malgrath was not the organized iron-and-smoke trading hub it would eventually become. It was a visceral, lawless crucible—a frontier city bleeding at the edges, where rogue guilds fought open gang wars in the streets and distant noble factions constantly vied for covert control. Blood ran down the gutters faster than rain. Strength was the only law, and death was a daily spectator sport.

A boy alone in such a place should have died within a week.

Vesper didn’t die. He adapted like he had for twelve years.

Without a master to teach him magic, Vesper learned through trial, error, and pain. He spent his nights tucked away in abandoned bell towers, concentrating on that small, dark core inside his chest. He learned how to manipulate his mana—not to cast grand, flashy spells, but to bend light, to hush the sound of his footsteps, and to coat his crude iron daggers in a thin edge of shadow-mana that could slice through leather armor like wet parchment.

By fifteen, Vesper had moved from stealing scraps to surviving in the pit.

The Subterranean Pit was Malgrath’s subterranean combat ring—a brutal, iron-caged arena beneath the central market where mercenaries, deserters, and desperate brawlers fought for silver. Vesper didn’t fight for the coin. He fought for the violence. He needed to test his limits against men twice his size, forging his body into a weapon.

In the dim, torch-lit cage, Vesper moved like a ghost. While heavy brutes swung broadswords, Vesper slipped through their guards, his shadow-laced movements making him look like a flickering smudge of ash under the flickering flames. He targeted throats, tendons, and eyes, earning quick, bloody victories that stunned the rowdy crowds.

”Who the hell is that kid?” the pit bosses would whisper, watching him step over the bleeding bodies of veteran gladiators.

”Don’t know,” another replied, watching the hooded boy wipe dark shadow-mana from his blades. ”Moves like smoke. Kills like a shadow. Leaves nothing behind but ash.”

The alias stuck: The Ashen Shadow.

By eighteen, Vesper had abandoned the pits entirely, transitioning into the lucrative, lethal world of freelance assassination. He took contracts that older, seasoned killers refused—targeting corrupt faction leaders, rogue guild lieutenants, and black-market merchants. He executed his targets with terrifying, cold efficiency, leaving no traces, no signatures, and no survivors.

He was rich. He was feared. He was completely untouchable in the Malgrath underworld.

Yet, despite his growing reputation, Vesper felt a hollow emptiness echoing in his chest. Every night he returned to his cold, empty safehouses, surrounded by gold he didn’t care to spend and blood he couldn’t wash off his hands. He had built supreme strength, but he was entirely alone in a city that ate strays for breakfast.

He was just a lone wolf waiting for a flock worth bleeding for.

That empty silence lasted until a cold, rainy autumn night in the Lower District—the night he turned down a dark, copper-smelling alleyway and found a dying fifteen-year-old boy lying in a pool of his own blood, clutching a broken spear point in his chest.