The Weapon Genius: Anything I Hold Can Kill-Chapter 191: One Night (Part Fourteen)

The floor was a minefield of sparks and unconscious bodies. Metal grates groaned underfoot, warped from energy blasts and torn from their bolts. Burn marks licked the walls. Electricity danced in the air, and blood had begun to steam against the overheated steel.

Kang Hyun’s eyes didn’t flinch.

He loosed one arrow high—embedding it into a vent pipe—then rolled his wrist and sent another arrow low, skipping it along the ground. Both exploded on contact. The first rerouted a heatwave launched at Yujin, the second sent a blade-wielding prisoner reeling backward, his momentum reversed mid-strike. He slammed into a wall he’d never meant to touch.

"Six o’clock!" Yujin’s voice was sharper than the claws that just tore through her gloves.

Already mid-spin, she kicked off a support beam and shifted midair, muscle structure rippling as white fur sprouted down her arms. Her body elongated for a heartbeat, her legs thickening and her hands turning into hybrid claws with black, stone-colored bone tips.

She landed with grace that shouldn’t belong in a battlefield. The two prisoners in front of her lunged in perfect sync. It didn’t matter.

One swipe—both went down.

"I got more on the west corridor!" she called out, ducking low as flame spewed across the overhead lights. "Two with enhancement bracers! Their system boosts aren’t stock!"

"Noted," came Kang Hyun’s flat reply. One arrow zipped forward before his next breath, catching one by the ankle and redirecting his entire body mid-charge—he crashed headfirst into his own ally.

"...amateurs."

From the side, Echo landed without a sound. His feet hit the grated floor like a feather, the acoustics from his movement buffered entirely. Around his ankles, waves of warped air spiraled outward—shimmering like oil on water.

"Want the honors, old man?" he asked, brushing some ash off his shoulder.

Kang Hyun didn’t look at him. His breathing had become tight, the shoulder of his coat torn and stained. "Too old for this shit," he muttered. "Handle it."

Echo smiled, tilting his neck until it popped.

"Clear me a lane," he said. "Time to end the show."

Hyun didn’t need to reply. He fired two more arrows—one into the left wall and another into Yujin’s lower back.

Yujin let the red-glowing arrow surge through her and spun, launching herself like a cannonball to the side. She cleared the entire left flank of prisoners—slamming one into the ceiling and another straight through a half-melted table

"Go!" she shouted.

Echo needed no second invitation.

The moment she moved, he did too.

A single step—the hallway thundered as the sonic boom cracked around him. A distortion trailed behind, like a translucent version of himself lagging two paces behind. He moved faster than human eyes could follow, ricocheting off the walls with bursts of compressed sound, vaulting off corners, and propelling himself forward like a missile guided by the reverb in the room.

She was waiting.

Eun Hae.

Fourth Cell of the Eight.

She stood still in the center of the western atrium now, her steps slow, deliberate, as if she hadn’t just walked into the chaos—but had orchestrated it from the start.

Even the prisoners who had rallied behind her began to hesitate, suddenly still.

She was barefoot. Her lips were redder than blood, her nails painted black. Long black hair pooled behind her shoulders like a veil of ink. And somehow, even with fire behind her and chaos echoing all around, she didn’t look out of place.

She looked like a crescendo that had yet to drop.

Echo stopped ten meters away. Dust and ash rippled off his coat as his shockwaves dissipated around him. One hand stayed loose near his waist.

"Wanna give up before I kick your ass?" he said.

She didn’t answer.

Instead, her eyes traced his posture. Then his hands. Then his throat.

"No thanks handsome," she said. Her voice was smooth, low—not loud, but present, like it was being whispered into your ear even if you were twenty feet away.

"Handsome?" Echo replied, tilting his head. "How flattering"

She smiled.

Then sound in the room changed.

No, not the sound—the texture of it. It became velvety. Slow. Like wading through water.

"Do you like music?" she murmured. "Let me play your favorite note."

Echo’s foot twitched—just slightly—as though caught on something invisible.

The lightbulbs overhead dimmed by a fraction.

He snapped his fingers—and the entire space erupted in a rebound shockwave.

The sonic burst slammed the air back into clarity. All illusions shattered. Echo was already airborne, vaulting forward in a spiral. His boots kicked up thunder, and he struck the ground with a charged palm, sending a rippling disc of sound crawling across the floor.

Eun Hae stepped lightly over it, her movement too smooth to be rehearsed.

She wasn’t even trying to dodge.

He came at her again. From above this time. He used the drop to generate a bass-drop level of kinetic force, a cone of compressed echo surrounding his descending fist.

"What the hell was that just now?" he asked

She raised two fingers.

"Pause."

It wasn’t a shout. It wasn’t even a command. It was a whisper, barely above the hum of distant fighting.

But it hit like a brick wall.

Echo’s entire body seized up. Not from pain. Not from paralysis. Just—emptiness. The kind that stilled every muscle, wiped his momentum, and pulled the floor up to meet him. The echo around his fist faded like a wave pulling back from shore, and he landed softly on his feet, feet apart, fists half-raised.

And he didn’t swing.

He just stood there. Blinking. A few inches from her face.

She leaned forward.

"Good boy," she whispered.

Then she moved to strike.

But in that split second, his instincts screamed.

He twisted back on pure muscle memory, throwing himself into a slide. Her hand—razor-nailed and glowing with a violet shimmer—missed his cheek by less than an inch.

He skidded back into a crouch, panting once, blinking twice, eyes wide. "The hell was that?"

Eun Hae didn’t answer.

She laughed.

And then she moved.

This time it wasn’t just seduction. It was war.

Venomous energy burst from her fingertips, glistening trails of liquid light that twisted in midair and spat downward like acid raindrops.

Echo moved.

The sound of his own footstep became a weapon, launching him into a sprint faster than the eye could track. The blasts exploded behind him, missing by millimeters—but not all of them missed.

One struck a prisoner still scrambling to crawl away.

He screamed.

The venom didn’t burn—it froze, instantly paralyzing his joints and causing his mouth to foam, his limbs convulsing in jagged spasms. Another prisoner, trying to drag him to cover, caught a splash across the chest.

He dropped to the ground, writhing, bones audibly cracking under the skin.

"Holy shit," Echo muttered under his breath, pivoting and using a bounce-step to vault over a crumbling railing. "She’s hitting her own people!"

Eun Hae didn’t seem to care.

Her expression didn’t change. Not when a man collapsed, clutching his throat. Not when another started convulsing so violently that he tore at his own skin to make it stop.

Echo came around the next bend.

A rebound off a pipe. A sonic shove from a wall. He launched toward her in a blur, building a harmonic distortion around his limbs to hit her with a stacked frequency strike. The force would level the bones of a car.

He hit her in the ribs.

The impact was massive.

A concussive wave burst outward. The nearest two prisoners were knocked flat by the sound alone. Echo landed in a spin, dust coiling at his feet.

Only one problem.

That wasn’t her.

The woman’s body crumpled instantly—but it wasn’t Eun Hae. It was one of the entranced prisoners, dressed in a similar prison uniform, veiled in a thin glamor that must’ve hidden her features just enough to fool him.

"Damn it—"

He didn’t finish the sentence.

Arms wrapped around his waist from behind.

Not lovingly. Possessively.

Her body pressed flush against his back.

"Found you," Eun Hae purred into his ear.

And before he could swing, move, sound, she was touching him—rubbing her hands slowly across his chest, sliding up his throat, her breath cold against his ear.

"You move so fast," she whispered. "It’s beautiful. You’re beautiful. But you took out my last pet."

Her lips brushed his neck.

"So now," she whispered, voice lower still, "I’ll make you mine."

She kissed him.

Not soft. Not gentle. Deep. Cold.

Echo’s mind fractured. It wasn’t lust. It wasn’t hypnosis. It was emptiness. A wave of hollow white that devoured sound, erased thought, and silenced the internal voice that told him who he was.

The hum in his chest died.

The music stopped. 𝗳𝚛𝚎𝚎𝘄𝕖𝕓𝕟𝕠𝚟𝚎𝕝.𝗰𝕠𝐦

And for one long moment, Echo just stood there. Silent.

Then she pulled back.

"Take them out," she whispered. "All of them."

His hands lifted.

The air around him twisted.

His pupils shimmered blue.

From his chest, a resonant hum began—low and growing. A massive bass undertone built beneath the surface, vibrating the metal floor, rippling the crushed tables, sending cracks through the ceiling.

And then—

He released it.

A sonic explosion tore through the corridor.

It didn’t aim at Eun Hae.

It aimed backward—toward his friends.

Kang Hyun was the first to react.

He didn’t curse. He didn’t shout.

He moved.

One arrow into the ground at his feet. One arrow into Yujin’s shoulder.

The instant they connected, the arrowheads exploded—not with force, but momentum. It reversed their movement, anchoring them in place with such precision that the oncoming shockwave slammed into them like a hurricane—but didn’t toss them.

"Anchor Down," Hyun muttered.

The walls cracked. Support beams warped.

Yujin, mid-shift, slammed one claw into the wall and grit her teeth. "What the hell?! That’s Echo?!"

"Not himself," Hyun replied, sweat now coating his brow.

The sound stopped.

And Echo stood motionless in the dust cloud.

Unblinking. Breathing. But not moving.

Eun Hae behind him, lips still curled, fingers still resting on his shoulder.

Kang Hyun exhaled.

Long. Tired.

"I’m seriously too old for this shit."