True opportunity is never a gift dropped from the heavens.
It is the ability to hear a hidden door opening—
inside the very sound others mistake for danger.
Scrape… scrape…
The sound crawled along the stone wall.
Like countless tiny claws scratching against solid rock, it echoed through the dead silence of the cave, amplified until it made the scalp prickle.
Jiang Muchen rose slowly to his feet.
The jade flute slid into his palm. A faint cyan glow pulsed along its surface—light and dark breathing together. It was the unique resonance born from the fusion of his chaotic sword intent and the swift wind sword path, subtle but unmistakable in the darkness.
By the campfire, the sleeping disciples woke almost simultaneously.
Lu Hanshan was the first to react, dragging Mountain Splitter into his hands. The blade scraped against stone with a harsh screech. Zhou Xiaohuan hurriedly shoved the half-finished Resource Compendium into her robe, fumbling as she grabbed the crude wooden staff she had carved for emergencies.
More than twenty people gathered quickly, backs pressed together, forming a circle.
It was the Sixfold Defensive Formation—awkward, imperfect, but functional. Three nights of drills had taught them to assemble it within three breaths.
"What the hell is that sound?" Zhao Tiezhu growled, veins bulging as he tightened his grip on a mining pick fashioned from scrap iron.
Jiang Muchen didn't answer.
He lifted the flute to his lips and released a short, clipped note—not music, but a probe.
The sound rippled outward like water, struck the rock ahead, and returned with subtle variations.
Echo-Reading, recorded in the Art of Resonance with All Living Things. Over the past few days underground, he had practiced it relentlessly—learning to read shape, density, and distance from reflected sound alone.
The feedback made his brow tighten.
Not alive—at least not in the usual sense. There was no pulse, no organic rhythm.
But it wasn't loose rubble either.
The sound was too dense.
Too many things moving together.
"Everyone," he said calmly, "step back three paces. Hold formation. Torches forward."
They obeyed instantly.
Firelight trembled in the damp air, barely illuminating twenty feet ahead. Beyond that, darkness thickened like ink.
The scraping sound came from its deepest part.
Then—
It stopped.
Three breaths of silence.
Long enough to feel like an hour.
And then the darkness surged.
A silver-gray tide poured forward.
Thousands—no, tens of thousands—of beetles the size of knuckles flooded into view. Their shells gleamed like cold metal. Fine serrated mandibles jutted forward, catching the firelight with a lethal sheen.
They moved impossibly fast.
In the span of a blink, they crossed ten meters, rushing straight toward the fire.
"Bone-Eaters!" Zhou Xiaohuan cried, her voice shaking. "I've seen them in the Poison Insect Codex! They swarm on corpses and skeletons—when they move in numbers, even late-stage Qi beasts are stripped to bone in ten breaths!"
The swarm was less than five meters away.
Several of the weaker disciples turned deathly pale. Weapons shook in their hands.
This wasn't fear of death.
It was fear of numbers—of endless, crawling inevitability.
And yet—
Jiang Muchen laughed.
The sound was quiet, but in the cave's silence it rang clear.
"This," he said evenly, with a trace of excitement, "is good news."
"G-good news?" Li Hu croaked.
"Bone-Eaters only nest where massive quantities of remains accumulate." Jiang Muchen's gaze pierced through the swarm toward the darkness behind it. He raised the flute, pointing.
"If they came from there, it means the bone deposits beyond far exceed everything we've cleared these past three days."
Before the words finished, he acted.
The flute sang.
Not the calming Clear-Heart Tone.
This melody was fractured—irregular, disruptive. A rhythm born of observation and deduction, refined over three days by watching insects and vermin move within the cave.
It was Repulsion Resonance—not lethal, but destabilizing. A mimicry of a predator's wing-beat frequency, designed to shatter the swarm's collective order.
Within three meters, the beetles faltered.
The front ranks spun in place, disoriented. The rear slammed into them. Mandibles snapped blindly, tearing into their own kind. The silver tide twisted into a chaotic vortex.
"Senior Brother Lu," Jiang Muchen commanded smoothly, never breaking the tune.
"Three people. Use the Earth Pulse from the Thick Earth Art. Low frequency. Deep. Like a heartbeat."
Lu Hanshan hesitated only a heartbeat before acting. Three days of survival had forged instinctive trust.
He chose Li Hu and two others with strong earth-aligned energy.
Together—
They struck.
Sword. Pick. Heel.
Boom. Boom. Boom.
Low, heavy shockwaves rippled across the ground.
Bone-Eaters sensed primarily through vibration. The pulsing tremors shattered their perception entirely. Beetles turned on one another in panic. Dark green ichor burst across the stone.
"Zhao Tiezhu," Jiang Muchen continued, "two people with you. Torches forward—don't burn them. Three feet distance. Threaten only."
Three torches pushed ahead.
The light alone made the swarm recoil.
"Xiaohuan," Jiang Muchen said, turning to the trembling girl, "the repellent powder. The batch you mixed yesterday."
She jolted, then fumbled out several paper packets. Gritting her teeth, she ran forward and hurled the powder into the chaos.
A sharp stench—sulfur and rotting herbs—exploded into the air.
The swarm broke.
They fled screaming back into the darkness, trampling one another, leaving broken shells and viscous remains behind.
From emergence to collapse—
Twenty breaths.
Silence returned.
Zhao Tiezhu stared at the ground, then at his shaking hands.
"Just… like that?"
Jiang Muchen knelt by the branching tunnel, lifting fragments of beetle shell.
"These shells are heavily worn—edges smoothed by long-term friction. They've been moving through narrow, hard passages for years."
He tapped the ground with his toe.
"Notice how they avoided this spot when charging."
The stone there was darker. A hairline fracture barely visible.
"Unstable ground. Hollow beneath." He stood, eyes sharp.
"Bone nests plus unstable geology usually mean one thing—collapsed cavities… or sealed chambers."
"Dig!" Zhao Tiezhu blurted.
"No." Jiang Muchen shook his head. "Mark it. Dawn only. Low light and exhausted reserves invite cave-ins."
He examined the retreat path. Three feet above the ground, a vertical slit barely wide enough for beetles.
Its edges were smooth.
Cut.
Not natural.
"Not a natural formation," he said quietly.
He turned to the faces lit by fire—hope flickering.
"Rest now. Tomorrow, we may have a real surprise."
Morning
They gathered early, alert and eager.
Assignments were swift.
Guarding. Digging. Recording.
Pick struck stone.
Two hours later—
"Stop."
Jiang Muchen pressed his palm to the warm rock and closed his eyes.
Listening.
Feeling.
Then—
"It's hollow behind this," he said softly. "And there's residual earth-aligned spiritual energy. Clean. Refined."
Lu Hanshan stepped forward.
Not force—resonance.
The stone gave way.
Behind it—
A door.
Carved. Smoothed. Marked with ancient protective sigils.
A sealed chamber.
Inside—
A seated skeleton.
A rusted iron box.
And a message carved with the last strength of a dying cultivator.
Beware… the Nether…
The rest was lost.
Jiang Muchen bowed deeply.
Some inherit treasure.
Others inherit warnings.