My Taming System Makes Me Overpowered

The silence of the subterranean vaults felt fundamentally different from the quiet of the War Room above. Above, the silence was a held breath—a brittle, panicking stillness before a storm.

Down here, eleven levels beneath the marble foundations of Nethros, the silence was ancient, heavy, and indifferent.

General Nerissa descended the spiral basalt staircase, her dark sapphire tail slicing through the dense, frigid water with long, measured strokes.

With eighty percent of the palace garrison redeployed to enforce the evacuation orders across the outer districts, the subterranean corridors were virtually abandoned. The long, vaulted halls of dark stone were lit only by the sparse, dying glow of deep-sea moss. A skeleton patrol of four guards bowed as she passed, their faces pale behind their hydro-visors. She dismissed them with a sharp wave of her hand, preferring to walk the final corridor alone.

She stopped outside the massive, runic-sealed door of Cell Seven.

Nerissa was a woman governed by tactical calculus. Four noble crests on the high command map had gone dark. The Calm of the Sea was systematically carving his way toward the core of the city, and her military command was straining under the weight of an invisible, surgical enemy. Yet, despite the fire burning across the Western Ridge, her mind kept dragging her back to this damp, dark box.

She pressed her palm against the abyssal iron plate. The heavy runes flared sea-blue, and the multi-ton door ground open.

Inside, the atmosphere was preserved in a sphere of pale green light—Lyrielle’s wind-barrier, holding back the crushing ocean pressure.

Vince sat in the center of the stone floor, his back leaned comfortably against the rough basalt wall. Heavy abyssal iron manacles bound his thick wrists together, connected by a dense chain anchored to the floor. Outside the flickering green sphere, small, blind deep-sea fish drifted past the reinforced glass of the iron door. Vince looked less like an elite prisoner awaiting execution and more like a man relaxing on his front porch on a quiet afternoon.

His dark eyes tracking her as she stepped inside, a faint, maddening smirk playing at the corner of his lips.

”You’re pacing, General,” Vince said, his deep voice carrying casually through the wind-barrier. ”Or the underwater equivalent of it. Your fin-strokes are about three beats faster than when you brought me down here.”

Nerissa crossed her arms, her golden eyes narrowing as she stood just outside the green veil. ”Your perception is as sharp as ever, human. Though I would think a man in chains would concern himself more with his own lifespan than the tempo of my tail.”

”Chains are just metal,” Vince replied, shifting slightly, the heavy abyssal iron clinking against the floor. ”They don’t talk. But you... you bring a lot of noise with you every time you walk down that hall. It’s quieted down out there. A lot less boot-steps in the corridor.”

”A tactical redeployment,” Nerissa said smoothly, keeping her voice carefully devoid of emotion. ”The outer districts require additional oversight.”

”Tactical redeployment,” Vince repeated, letting out a dry chuckle. He tilted his head back against the stone, looking up at the vaulted ceiling. ”Is that what you call pulling eighty percent of your guard force out of the palace because a single merman is tearing through your outer estates?”

Nerissa’s breath hitched—a micro-fractional pause that would have been invisible to anyone else, but Vince’s dark eyes locked onto her instantly.

”What did you say?” her voice dropped to an icy whisper.

”The Calm of the Sea,” Vince said casually, as if reading off a mundane grocery list. ”Four noble houses down. Vaelen was the last one, wasn’t it? And now you’re scrambling to send elite couriers out to House Aris, Belor, and Thalor, begging them to run back inside these high stone walls before he catches them in the open.”

A terrifying wave of hydro-mana flared around Nerissa’s body, the air-water boundary of the wind-barrier rippling violently under the sudden spike in pressure. Her webbed cheek-fins flared crimson with suppressed rage.

”You have a rat in your war room, General,” Vince continued calmly, unbothered by the pressure wave. ”Or maybe your stone floors just carry vibrations a whole lot better than your architects calculated. When you talk high-level strategy directly above a subterranean vault, sound travels down the iron pipes. Especially when the guy sitting down here doesn’t have magic distracting his hearing.”

Nerissa took a slow step forward, bringing her face inches from the wind-shield. Her golden eyes burned with lethal intensity. ”You are playing a dangerous game. If you are aligned with this rogue—if your arrival at our gates was a coordinated distraction—I will strip the flesh from your bones myself.”

”If I was working with him, you’d already be dead,” Vince said, his voice dropping into a flat, iron tone that matched the chains on his wrists. ”Look at your strategy, Nerissa. You’re playing defense against a guy who knows your entire layout. You pull eighty percent of your strength out to the perimeter to escort a bunch of terrified nobles, which leaves your core weak. And if he bypasses your couriers? Then you’ve just spread your forces thin enough for him to pick them off one by one.”

Nerissa stared at him, her chest rising and falling in tight, controlled breaths. The frightening part wasn’t that he knew—it was that his brutal, external perspective echoed the exact gut-feeling she had tried to suppress during the War Room council.

”My soldiers are the finest in the seven seas,” she said softly, though the edge in her voice had lost its certainty. ”They will secure the noble lineages.”

”Hope isn’t a tactic,” Vince grunted, flexing his shoulders slightly. ”You’re treating symptoms while the foundation is shaking under your feet. But hey... what do I know? I’m just a human in a box.”

For a long moment, the only sound in the cell was the low, steady hum of Lyrielle’s wind-barrier.

Nerissa looked down at the man—at his unbothered posture, his calm, calculating eyes, and the absolute absence of fear in his body. He didn’t look at her like a prisoner looking at his captor. He looked like an grandmaster observing an amateur’s opening chess move.

”If the outer line collapses,” Nerissa said, her voice turning cold as glacier ice, ”and if that rogue breaches the inner city walls... I will not leave you here as a wild card. I will return to this room, and I will execute you myself before I face him.”

Vince leaned his head forward, his dark eyes fixing on hers with a sudden, vicious glint. A low, slow grin spread across his face.

”Bring extra guards when you do, General,” Vince said softly. ”You’re gonna need them.”

Nerissa stared at him for three long seconds before turning sharply on her tail. She struck the iron control plate, and the massive basalt door slid shut with a deafening, echoing thrum, locking the darkness back inside.

Alone in the dim green glow, Vince let his smile fade.

He looked down at his wrists. Inside his mind, the dark, crimson icon of his Man-Beast transformation flickered from a grayed-out timer to a bright, steady glow. The cooldown was completely clear.

Vince rotated his wrists slowly inside the heavy abyssal iron cuffs. Underneath his skin, the dense muscles of his forearms coiled, testing the physical leverage against the metal anchors. The abyssal iron groaned faintly under the quiet, un-magical strength of his frame.

”Not long now” Vince whispered to the quiet room, closing his eyes.