Past the Sector 1 exit lobby, the corridor opened into a vast underground vault three hundred yards across and four hundred feet tall.
The roof was lost in black shadow, webbed with massive structural steel girders, rusted cable trays, and insulated chiller piping that vanished into the gloom. Down down down beneath the walking level plunged the **Abyssal Void Chasm**—a jagged tectonic trench filled with swirling violet spatial gas and howling downdrafts. Stray chunks of gravel kicked over the lip didn't make a sound when they fell; intermittent purple spatial lightning simply vaporized them fifty feet down into ion smoke.
Spanning the trench was an eighty-foot-long, three-foot-wide suspension bridge.
The walking deck was made of eighty bleached vertebral ribs taken from an ancient primeval dragon. Heavy braided titanium-alloy wire rope laced the bones together, anchored to sheer granite abutments by four five-inch-thick structural steel suspension cables.
Above the entry abutment, an ancient First Epoch warning sign was stamped into the rock with yellow reflective paint:
**[CHAMBER 02: STRUCTURAL GRAVITATIONAL TENSION & ACCELERATION TEST GANTRY]**
Across the Great Yan Empire, sect masters called this crossing the **Abyssal Gravity Bridge of Dragon Bones**.
Monastery steles recorded that the First Gods imbued the span with Nine-Fold Soul-Crushing Celestial Gravity to test the marrow and resolve of mortal seekers. Every ten paces across the dragon ribs, the heavenly gravity multiplied by a full fold.
By the halfway point, a man carried five times his earthly weight. By the final ten steps, he faced a bone-splintering Nine-Fold Gravitational Domain. The greatest feat in imperial history belonged to Patriarch Tiegu of the Iron Bone Sect. A peak Golden Core body-cultivator whose skeleton was tempered in molten spirit-iron, Tiegu spent twenty-one days, four hours, and eighteen minutes crawling across the bridge on his belly. He gained half an inch an hour, coughing mouthfuls of golden essence blood while all two hundred and six of his bones cracked and fractured under the load. Three thousand lesser prodigies had slipped over the centuries, their pulverized remains atomized by the purple lightning below.
Austin stood on the granite abutment, hands on his hips.
He leaned over the edge, squinted into the purple fog, then crouched to inspect the underside of the first dragon bone.
Bolted beneath each bleached vertebra was a cylindrical induction coil wound with heavy copper magnet wire. Armored conduits branched from each coil back to a stepped transformer relay box bolted to the cliff face.
Austin brought up his system HUD, his wire rims catching the green diagnostic glow.
Austin stared at the readout, then let out a dry, rasping snort that echoed across the chasm.
"A tensile fatigue rig," Austin said, shaking his head. "They bolted stepped induction coils under the deck to load-test the suspension cables up to nine Gs to see if the titanium bushings would warp under cyclic dynamic tension. That's all this is. An automated cable stress test. And the local cultivators took one look at an industrial load gantry, threw away the operating manual, and turned it into a twenty-one-day belly crawl for immortality."
He knelt down further, shining his hard hat beam onto the electrical relay on the cliff wall.
"Look at this switchgear," Austin grunted, tapping a corroded conduit with his grease pencil. "Three-phase four-hundred-eighty-volt feeder line tied straight into open-air contactors. No enclosure gaskets. No arc-flash shielding. They didn't even run an equipment grounding conductor down into the rock. The whole circuit is floating twenty thousand volts above ground potential. If the humidity in this cave crept up five percent, this entire bridge would dead-short into a fireball."
Running along the rock wall beside the relay was a sub-zero coolant loop feeding the coil chillers. The raw copper tubing was crusted thick with jagged white frost, weeping drops of icy condensation into the dark.
Pug trotted over to the frosted pipe. His left head sniffed the white frost, curious, and extended a broad pink tongue to give it a lick:
*Sssssht.*
The wet tongue stuck fast to the sub-zero copper. Pug’s eyes went wide. His middle head let out a muffled *whine*, while his right head snapped awake in surprise. Then, with a tiny, warm burp of solar heat from his throat, the frost sizzled, the tongue popped free, and Pug shook all three heads with a wet, flapping rattle. Undeterred, Pug turned his attention to a bundle of weather-beaten black cable ties securing the chiller line to a rusted unistrut bracket. His middle head clamped onto the plastic tails, chewing with happy, rubbery crunches: *crunch, squeak, chomp.*
Austin stood up, rolling his shoulders.
In his dantian, the **Super-Dense Stellar Crucible** burned at seven hundred and fifty thousand Kelvin, packing a mass of two hundred and ten quintillion kilograms.
Because the First Epoch containment mesh leaked zero point zero zero two percent of that mass, Austin’s natural, passive gravitational sphere was locked at an unyielding **Fourteen Times Earth Gravity (14.0G)**.
His HUD ran the vector equations across his retinas.
"Nine Gs of artificial downward draw from the bridge coils," Austin muttered. "Meeting my passive fourteen-G localized field. The magnetic flux phase angle is ninety degrees out of alignment with my internal stellar core."
Basic wave physics took over.
When an external 9.0G magnetic induction field tries to drag down an object generating a localized 14.0G well...
The external field doesn't add weight.
Instead, the clashing wave vectors produce an inverted, high-tension **gravitational counter-buoyancy**.
Austin took a step onto the first bleached vertebra:
*Clomp.*
He took two more strides out onto the narrow dragon bones.
Behind his spectacles, his eyes lit up.
The sluggish fourteen point two percent movement drag—the heavy, sticky floor penalty that had been annoying him ever since Level 38—vanished completely.
The bridge’s artificial magnetic coils pulled upward against his natural downward well, canceling out the excess mass calculation like a pair of opposed pneumatic cylinders. His boots felt light, springy, and energetic, as if someone had fitted him with fresh air-cushioned track spikes.
"Well now," Austin chuckled, bouncing twice on his heels: *Boing, boing.* "The collision friction penalty just dropped to dead zero. Responsive footing. Perfect rebound."
He reached to his tool belt, pulled out a small digital pedometer, and snapped it securely onto the waistband of his dungarees.
He settled his five-foot Stellar-Steel pipe wrench across his right shoulder, squared his hard hat, and turned back to Li Xiaoyao and Pug on the abutment:
"Stay within three paces of my belt," Austin ordered. "My fourteen-G envelope neutralizes the bridge's induction coils. Step outside that three-pace bubble and you'll get pressed into a smear of jam. We're doing a light cardio interval across the span. Match my cadence."
Austin dug the steel toes of his boots into the dragon bone.
Then Austin **jogged**.
*Clomp-clomp-clomp-clomp-clomp!*
At a crisp, steady four-minute-mile pace, Austin’s boots hammered down the dragon vertebral bridge.
Around his shins, the one hundred and twelve orbital particles—granite pebbles, pine needles, lathe filings, and soap bubbles—spun in their four concentric planetary tiers. They whirled with the clean, supersonic whistle of an axial compressor: *WUUURRRRRRR!*
Behind him, Cerberus Pug bounded with joy. All six ruby eyes sparkled; his three tongues hung out sideways, slobbering freely as his three tails whipped the air in a happy blur. An eight-hundred-pound solar hellhound out for a brisk morning run:
*Pant, pant, pant!*
Li Xiaoyao sprinted right in Austin’s wake, white robes snapping in the howling draft. Whenever Xiaoyao dared glance past the three-pace perimeter of Austin’s belt, he saw the cavern air twisting with violent, purple gravitational shear capable of flattening cast iron like pie crust. Yet inside Austin’s wake, the boy felt light as thistle fluff drifting across an autumn meadow. A wild, breathless laugh burst from his chest!
Ten steps: 2G artificial field! Austin stretched his stride, picking up speed!
Thirty steps: 5G field! The titanium suspension cables sang under dynamic tension, but Austin’s breath stayed even!
Sixty steps: 8G field! The air groaned with magnetic flux, but Austin merely tapped the heart rate widget on his HUD: *Seventy-two beats a minute. Resting athletic baseline.*
Eighty steps: 9G peak test threshold!
With a final, clean spring from his back foot, Austin cleared the last vertebra, soaring across the safety gap and landing squarely on the far concrete deck:
*THUMP.*
Austin pulled up into a smooth, easy walk, pressing the split button on his digital pedometer.
Beside him, Pug skidded onto the pad with all four paws, barking a booming triple-bark—*Woof, ruff, bark!*—while Xiaoyao stumbled forward, clutching his knees and laughing hysterically.
On the far rock wall, an ancient First Epoch diagnostic terminal chimed in rapid-fire electronic tones:
*BEEP-BEEP-BEEP-DING!*
Austin pulled a cotton rag from his pocket, wiped a single drop of sweat from his temple, and checked the pedometer screen.
"Forty-eight paces. Twelve point four seconds," Austin said, nodding with quiet professional satisfaction. "Solid aerobic interval. Good calf engagement. Kept the cardiovascular pump primed."
Behind him, Li Xiaoyao collapsed onto his backside on the concrete. He stared back across the yawning void, eyes wide, fingers digging into his hair:
"Twenty-one days..." Xiaoyao choked out, his voice cracked with awe. "Patriarch Tiegu broke two hundred and six bones... dragged himself through his own blood for three whole weeks... and the Patriarch jogged across it in twelve seconds... while monitoring his heart rate..."
Austin pocketed his pedometer, squared his hard hat, and pointed his grease pencil toward the heat-scorched blast door of Sector 3.
From under the warped steel sill, a wall of blistering thermal radiation rolled into the hall, thick with the stench of molten basalt, ozone, and sulfur.
Austin smiled, resting his pipe wrench against his shoulder:
"Chamber Two cleared with an SSS rank," Austin said deadpan. "Now let's see what kind of sequence-breaking we can do on the incinerator flue."