The crystal flask of Spirit-Marrow Dew was cold enough to form rime on Lin Ke’s fingertips.
Inside the quiet safe hall of Cellar Four, Lin Ke sat upon the dark rock anvil dais, the heavy iron blast doors deadbolted from within.
Before him rested the two empty ebony boxes from Apothecary He’s vault. The three stalks of northern Thousand-Year Frost-Lotus had already been simmered into a clear, rainbow-bright broth using the closed-loop copper steam cooler, their volatile spiritual essences packed into a single, glowing azure draught.
In traditional training, advancing from Qi Gathering 4 to Qi Gathering 5 was barred by the infamous Marrow-Lock Gate.
To form the fifth spiritual vortex in the lower dantian, the thickness of the circulating essence had to reach a critical high-pressure threshold.
When the dantian tightened to compress the fifth ring, the sudden backing-up pressure didn’t vent into the outer limbs. It reflected inward, surging backward through the nutrient arteries into the core of the long bones.
For a traditional fighter with soft, organic bone marrow, this sudden high-pressure backing-up pressure was total.
The marrow cavities would swell, tearing the delicate blood-vessel networks and causing excruciating bone-hemorrhages that left fighters coughing bloody marrow for months.
Lin Ke uncorked the crystal flask with his thumb.
Traditional fighters treat the marrow as fragile meat, Lin Ke analyzed coldly.
My marrow is no longer meat.
My Haversian canals are lined with high-pulling metal sleeves, anchored directly into an interstitial Ashen Iron Lattice.
What they view as a dangerous backing-up pressure leak... Is an unused high-bandwidth bus.
He closed his eyes.
Tianfu. Branch.
At double test model speed, Lin Ke ran the breakthrough dynamics through the mental sandbox.
In standard test model, the fifth vortex ignited in the dantian.
The crushing pressure spiked by one hundred and eighty percent.
The backing-up pressure hit the entrance of the marrow canals.
Instead of fighting the backing-up pressure—instead of trying to seal the marrow gates to protect the bones—Lin Ke designed an alternate routing table:
Dual-Bus Stonework.
Bus A (Main): The congenital glass spirit veins (Bing-Mai). Sight, non-elastic waveguides conducting tightly packed soliton packets at near-instant speed.
Bus B (Backup Ground): The Ashen Iron Lattice. The porous, metal bone matrix itself!
The Ashen Iron Lattice was thirty percent interstitial iron and carbon. Because of that, it possessed extraordinary natural spark and spiritual flow rate!
When the fifth vortex tightened, the excess high-pressure backing-up pressure wouldn’t be choked off.
It would be routed directly through the nutrient foramina into the Ashen Iron skeleton. It used the entire two hundred and six bones of his body as a massive, parallel backup bus and charge bank!
The bones would absorb the excess pressure, damp the high-pressure blast waves, and store the surplus spiritual charge in the metal lattice!
Lin Ke cut the mental branch.
He opened his physical eyes, pricking his left thumb pad with his iron metal pen.
“Branch checked: main.”
He lifted the crystal flask of Spirit-Marrow Dew to his lips.
He drank.
The liquid was freezing cold. A stream of liquid-oxygen and crushed diamonds that slid down his throat-pipe, numbing his chest in an instant.
The moment the elixir reached his stomach, the dense, pure spiritual essence exploded outward.
It wasn’t the crude, smoky, sulfur-laden energy of coal melted rock waste.
It was the clean, ancient, sub-zero essence of deep-mountain ice-slow veins.
Lin Ke opened the throttle in his lower dantian.
The four vortexes of Yang fire caught the ice-slow essence and ignited with blinding fury.
The four rings spun with terrifying angular speed, pulling the dense blue spiritual fluid into their gravity cores, condensing, compressing, and fusing the energy until the center of his belly began to glow with blazing bright golden-white bright glare.
BZZZZZZT.
The pressure spiked.
The fifth vortex began to form in the center of the dantian. A violent, expanding whirlpool of tightly packed Yang fire that demanded immediate volume to stabilize.
The high-pressure backing-up pressure hit the governing vessel.
Open the marrow gates, Lin Ke commanded his intent. Deploy Bus B.
He unlocked the nutrient foramina along his femurs, humeri, ribs, and spine.
The surging wave of spiritual fire didn’t tear his flesh.
It poured into his bones like liquid silver into cast-iron pipes.
THRRRRRRR!
A deep, ear-splitting, underground hum rang through the vault of Cellar Four.
Lin Ke’s entire skeleton began to vibrate with a pure, metal ringing tone.
The Ashen Iron Lattice absorbed the massive high-pressure surge effortlessly.
The slate-grey bones glowed with a faint, rainbow-bright bronze sheen beneath his pale skin, damping every high-pressure blast wave, grounding the pressure downward through his pelvis into his heels, and storing the excess spiritual charge in the dense metal lattice.
His glass spirit veins, securely mounted upon those unmoving iron heavy beams, carried the main stream with zero drag, zero rough churning, and zero volume spreading.
In his lower dantian, the final contraction occurred.
CLICK.
A clean, crisp, load-bearing lock engaged with the care of a bank vault door swinging shut.
The golden-white fire steadied.
Five distinct, nested, perfectly balanced vortex rings spun smoothly in his lower belly, revolving around a dense, crystal-clear core of purified spiritual mass.
Breakthrough: Qi Gathering 5!
Lin Ke opened his eyes.
The world was quiet.
There was no explosive blast wave, no shattered furniture, no dramatic display of spiritual arrogance.
There was only mass.
Lin Ke stood up from the dark rock anvil dais.
His boots touched the floor, and the flat stone slabs beneath him groaned under a subtle, quiet shift in physical gravity.
His skin was pale and smooth, his jaw carved from cold slate, his dark eyes deep and unblinking as underground pools.
He didn’t feel tense. He felt integrated.
His glass spirit veins conducted tightly packed packets at terrifying speed. At the same time, his Ashen Iron skeleton held the entire living framework with the unbending, shaking-damped permanence of a mountain range.
Across his eyes, the tracking data box updated:
Lin Ke walked to the wooden washstand, dipping a clean linen cloth into cold water and wiping the stone sweat from his face.
He slipped into a fresh clerk tunic of dark indigo hemp, tying his pocket ledger and brass measuring tongs securely to his sash.
He slid his iron metal pen into his right sleeve.
DONG.
Across the mountain valley, a huge bronze bell tolled.
The sound rolled down from the highest peaks of the Azure Cloud Sect, shaking through the pine forests and echoing off the stone foundries.
DONG.
The second toll.
DONG.
The third toll.
The morning gong of the Grand Hall.
The thirty days were over.
The Annual Outer-Sect Check: The Bone-Crushing Gravity Pagoda had officially begun.
Lin Ke walked to the heavy blast door of Cellar Four. He lifted the solid iron deadbolts with a single flick of his slate-grey wrist. Then he pulled the door open into the morning light.
Meng Shan and Shen Yue were waiting on the threshold. Their armor strapped was tight, their eyes burning with quiet, resolute fire.
Lin Ke looked at them. Then he turned his gaze toward the towering nine-story shadow of the Pagoda piercing the morning clouds.
“Formation checked,” Lin Ke said, his voice deep, ringing, and calm.
“Let’s go take the test.”