The residential district of Ihwa-dong clung to the steep, rocky slopes of Mount Naksan like a cluster of barnacles. Long before the Convergence, it was a quiet neighborhood known for its steep, winding staircases, mural-painted alleyways, and small, traditional Hanok houses that sat in the shadow of the ancient Seoul City Wall.
Now, with the city below drowning in a chaotic sea of blazing car fires and crackling mana storms, Ihwa-dong was entirely abandoned. The elderly residents had fled down toward the ergency military shelters hours ago, leaving behind a silent, terraced labyrinth of brick and stone.
Min-jae walked up a narrow, stone staircase that was so steep it would make a normal man gasp for breath within twenty steps.
He was bare-footed, his tattered black t-shirt hanging loosely over a chest that now possessed the subtle, jade-like luster of the [Iron Skin] realm. He didn't rush. With every step he took, his bare soles connected perfectly with the rough granite of the stairs. Thanks to his 25 points in Agility, his center of gravity shifted dynamically, absorbing the incline so efficiently that his posture remained as straight and unstrained as if he were walking across a flat tatami mat.
He stopped at the highest terrace of the hill, right beneath a crumbling section of the ancient stone wall.
Tucked away at the end of a dead-end alley sat a small, derelict Hanok house. Its wooden pillars were weathered to a deep, dark charcoal grey, its clay tiled roof partially covered in wild, overgrown ivy. The front courtyard was tiny, bounded by a low stone wall that overlooked the sprawling, smoking expanse of downtown Seoul below.
Min-jae pushed the creaking wooden gate open and stepped into the courtyard.
[The Overmaster System has scanned the local geography.]
[Topographical Evaluation:]
Location: Mount Naksan Peak (Natural Granite Bedrock Matrix)
Environntal Status: Low Ambient Mana Saturation (Shielded by the high-density mineral structure of the ancient wall)
Geographical Compatibility: 94% (Ideal for isolating the physical vessel from the World Tree Network)
[Do you wish to designate this location as your 'Martial Sanctuary'? (Y/N)]
"Yes," Min-jae said, his voice a low, solid vibration in the quiet courtyard.
The mont he spoke, a profound change rippled through the air. The golden light of the Overmaster System did not explode outward; instead, it seeped downward through his feet, bleeding directly into the granite bedrock beneath the Hanok house.
A faint, localized pressure wave expanded in a ten-ter radius around the property. It didn't destroy anything, but the thin, greasy film of ambient mana that had drifted up from the city below was instantly swept away, leaving behind a pocket of pure, unadulterated atmospheric vacuum. To any Mage or standard Hunter attempting to look at the hill with mana-detection skills, this tiny plot of land would simply appear as a dead zone—a geographic void that did not register on their digital tracking maps.
[Martial Sanctuary established successfully.]
[Current Domain Radius: 15 ters.]
[Passive Effect 'Absolute Severance' is active: Within this domain, the manipulation or manifestation of World Tree Mana is suppressed by 80%. Only the logic of 'Pure Force' remains absolute.]
Min-jae let out a long, controlled exhalation, a faint wisp of white vapor escaping his lips as his lungs filled with the newly purified, crisp air of the sanctuary.
Finally, he thought, sitting down cross-legged on the bare, stone floor of the Hanok’s wooden veranda. A place where I can break the next boundary without the world's data interfering with my cells.
In the standard progression of the world, a Hunter’s level dictated their survival. If a Level 20 Knight walked into a room with a Level 50 Mage, the sheer disparity in the system's nurical data would apply a passive "Suppression Debuff," making the Knight's limbs heavy and their skills slow. The World Tree used data to control reality.
But the [Martial Sanctuary] flipped the board. Inside this 15-ter space, a Level 50 Mage would find their mana pool locked behind a wall of pure, unyielding physical laws. Their fireballs wouldn't ignite because the system wouldn't allow the data to materialize. They would be forced to fight Min-jae using nothing but their soft, modern muscles.
Min-jae closed his eyes, his hands resting lightly on his knees as he turned his internal focus toward his lower abdon.
[Current Status:]
Realm: Mortal Flesh (Stage 2: Iron Skin - Perfected)
True Ki Pool: 30 / 30 (Saturated)
Next Evolution Tier: Stage 3: Jade Bone
Evolution Requirent: Compress the 30 units of 'True Ki' into a singular 'Internal Core Seed' and drive it directly into the skeletal marrow.
"Skeletal marrow," Min-jae murmured, his brows knitting slightly.
The Iron Skin stage was about defensive density—hardening the external layer to deflect blades and absorb kinetic trauma. But the Jade Bone stage was about foundational leverage. In pure martial arts, the bones were the true levers of power. If a man’s bones were soft, his muscles could never deliver their maximum potential without shattering his own frawork. To forge Jade Bones, he had to use his internal energy to literally boil his own marrow, purging the soft, biological fats and replacing them with a crystalized structure of pure True Ki.
It was a process that, in the ancient myths of the Murim, required decades of careful cultivation under the guidance of a Grandmaster. Min-jae had to do it alone, in an hour, using a glitched system as his guide.
"Let's begin," he said coldly.
Thump.
With a sudden, violent contraction of his diaphragm, Min-jae executed the Primordial Core rhythm in reverse. He didn't draw air in; he locked his breath entirely, forcing his lungs to go dead silent.
Inside his solar plexus, the 30 units of golden True Ki began to spin.
The speed of the rotation multiplied exponentially within seconds. The fluid, warm energy that had safely protected his tissue suddenly beca a violent, tearing vortex. The internal friction generated a heat so intense that Min-jae’s skin took on a deep, vibrant crimson glow, the jade-like luster of his Iron Skin fighting to keep his own flesh from lting from the inside out.
Crack.
A tiny, microscopic fracture appeared along the surface of his right collarbone.
[Warning! 'True Ki' compression has exceeded the safety thresholds of the human anatomy!]
[Your skeletal structure is experiencing localized structural fatigue!]
[Internal Temperature: 46.8°C and rising. Cellular damage imminent.]
Min-jae ignored the red flashing prompts flashing behind his eyelids. He locked his jaw so tightly that the pressure cracked one of his molar teeth, his fingers clawing into the hard wood of the veranda until his nails left deep, jagged gouges in the grain.
He didn't stop the compression. He forced it harder. He used the sheer, unadulterated willpower of a man who had died a dog's death in the dirt to smash the 30 units of energy together.
"Compress," he roared in the silent theater of his own mind. "Beco the seed!"
BOOM.
A silent, internal explosion rocked his entire consciousness. For a single, terrifying second, Min-jae’s vision went entirely white, his heart stopping as the 30 units of fluid energy violently collapsed inward, condensing into a single, microscopic speck of blinding, solid gold light right at the base of his spine.
The Internal Core Seed had been ford.
But the process wasn't over. Before the golden seed could stabilize, Min-jae used the remaining montum of his focus to drive that microscopic point of light straight into his spinal column.
SHIIIING—!
The golden light exploded along his nervous system like a localized lightning strike. The energy didn't travel through his veins this ti; it bored directly into the solid center of his bones.
Min-jae’s entire body went completely rigid, his head snapping back as a sound like shattering glass echoed inside his own skull. The golden seed was running through his marrow, systematically incinerating the soft, biological core of his skeleton and replacing it with a dense, shimring lattice of pure, crystalized force.
From his spine to his ribs, from his collarbones to his knuckles, and down to the tips of his toes—his skeleton was being systematically re-forged into sothing that no longer belonged to the human species.
Down at the base of Mount Naksan, a sleek, black armored SUV pulled up to the edge of the abandoned residential barricade.
The door opened, and a young woman wearing a sharp, dark blue coat with a golden sun crest stepped onto the asphalt. It was the sa analyst from the Miracle Guild who had stood in the basent with Choi Sung-min earlier that day. In her right hand, she held a highly sensitive, military-grade Mana Pointer device.
The needle on the device was spinning erratically, flipping between zero and maximum like a compass caught in a magnetic anomaly.
"Director," she spoke into her tactical earpiece, her eyes locked on the dark, silent peak of the hill above. "We've tracked the spatial distortion residue from the Myeongdong sector. It leads straight up into the Ihwa-dong residential zone. But... sothing is wrong with the local grid here."
"Report," Choi Sung-min’s deep voice crackled through the comms.
"The ambient mana... it's disappearing as it nears the top of the hill. It’s not being absorbed by a gate or a monster. It’s simply... fading out. It’s as if sothing up there is erasing the system's data entirely."
A long pause echoed over the radio frequency.
"Maintain your distance and establish a visual periter," Choi Sung-min commanded, his tone turning dangerously sharp. "Do not engage. The military is deploying the second vanguard squad to your position. If that rogue variable is trying to establish a nest up there... we burn the entire hill down before he can finish."
"Understood," she whispered, lowering her binoculars.
But as she looked up at the dark silhouette of the old Hanok house sitting on the ridge, an instinctual, primal dread settled deep into her stomach—a feeling that no blue system screen could ever explain.
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