The monitor died to black.
In the corrugated staging room, nobody spoke. The final transmission had broken off nearly a full minute prior, yet Hayama remained standing before the dark display, his arms folded across his chest webbing, eyes fixed on the empty cathode glass.
The last frame refused to wash out of his mind: two burning red embers, an impossible mass of armored limbs, and behind it, an unblinking crystalline glare.
"Can we patch the frequency back together?" Aizawa asked, the chair beneath him groaning as he leaned over the diagnostics console.
The comms technician rubbed red-rimmed eyes and shook his head. "It didn't drop out from range or battery drain."
Hayama didn't turn around. "What happened to the carrier wave?"
"It collapsed." The tech tapped a blunt finger against the telemetry readout. "The waveform didn't taper off. It hit a brick wall. Complete, instantaneous signal fracture."
"A localized hardware crush?" Mina asked, stepping up to the console with her slate.
"Or whatever was carrying it stopped existing in one piece." The technician swallowed heavily, glancing up at Hayama. "We harvested twenty-three discrete bursts before the line flatlined. Most are fragmentary—two, three seconds of corrupted frames."
"Reconstruct the sequence," Hayama ordered, his tone flat, even, and devoid of tremor. "Stitch the timestamps."
The control room erupted into mechanical haste. Keyboards clattered against metal desks, corrupt packets were stripped of noise, and audio feeds were scrubbed of high-frequency static. One by one, the raw data points locked onto the central monitor.
A patch of dark timber. A man's face smeared with grease. A damp stone tunnel. Blood smeared over ancient flags. A descending staircase. Then, a clean feed.
The camera shook violently with the wearer's heavy, swaggering stride. Three other men in unauthorized tactical gear walked ahead of him, carbines slung loosely over their shoulders.
"Poachers," Mina murmured, leaning close to the glass. Her finger traced the lower corner of the frame. "Look at the serial tag stamped on the camera casing. That's our inventory mark. One of the field loggers stolen from the surface lockers during the spring breach."
"So they trailed our drop," Hayama muttered.
The playback jumped forward.
The four men were moving through Level One's luminescent groves. At first, their movements were tight, tense, and hesitant. But then the lead poacher raised his weapon and put three rounds through the skull of a small arboreal quadruped. The animal dropped without a fight. The men laughed, kicking the carcass into the undergrowth.
Kill, laugh, advance. Another skittish beast gutted on a utility blade. Another boast caught on the mic.
"Amateurs," Hayama said quietly. "They mistook an ecosystem for a shooting gallery."
The recording skipped to Level Three.
The river appeared on screen, followed immediately by chaotic, bouncing footage. The bone-plated boar broke through the brush. Muzzle flashes strobed wildly against the bark. A man went down under crushing hooves with a sickening, splintering snap. The surviving three bolted into the limestone fissure, tumbling headlong down the rock corridor until they hit the anomaly chamber.
The same cavern. The same towering murals.
"Hold the frame there," Mina said sharply.
The tech hit a key. On the screen, the camera swept across the central wall: a colossal, lidless eye carved deep into the basalt, surrounded by rippling waves of chiseled smoke.
Mina split the monitor, pulling up the digital stills from her own slate. "It matches the mural on the upper dais. Different masonry, identical motif."
"And identical orientation," Hayama added, staring at the carved crystal held in the warrior's hand. "Keep playing."
The poachers discovered the staircase. The leader took the descent without hesitation, boots hammering the stone steps. The screen tore with heavy visual static, flickered twice, and stabilized inside a massive subterranean fortress.
Black basalt floors. Rotting, gore-stained banners hanging from pillars that rose into a vaulted void.
"That is well below Level Three," Aizawa breathed, adjusting his spectacles with a trembling hand. "The architecture doesn't belong to any known geological horizon."
On the screen, the poacher leader walked up to a second mural, sneering as he slammed his palm against the crystal relief.
Then the feed warped.
The ambient miasma gauge mounted on the wall began to shriek, the needle pinning against maximum threshold.
"Readings are spiking in sync with the transmitter," Mina warned. "The denser the miasma, the clearer the bandwidth."
On the monitor, shadows tore across the hall. Gunfire rattled through the speakers—frantic, blind bursts into the black. A man shrieked as iron claws dragged him across the flagstones. The camera crashed to the floor, rolling sideways into a puddle of fresh blood.
A massive limb stepped into the frame.
Segmented, chitinous armor coated in viscous black slime. The creature paused, turning slightly toward the fallen lens. Two burning red eyes dominated the screen—not biological organs, but faceted, pulsing stones that glowed with unnatural heat.
Then the monster moved out of view, and the lens caught the wall behind it.
The control room went dead silent.
It was not a carving. Embedded deep into the black basalt was an actual structure—a colossal, lidless Eye fashioned from pure, dark crystal. Its facets caught the dying lamp light, pulsing in a slow, rhythmic cadence that mirrored the spike in atmospheric toxicity.
"That isn't a symbol," Mina whispered, her hand tightening around her slate until the plastic creaked. "It's a generator."
"It's producing the miasma," Hayama said, his voice dropping low. "The staircase doesn't appear by chance. It solidifies whenever that core discharges."
The monitor flickered once more. High above the crystal Eye, partially lost in the gloom, a second colossal structure arched into the dark—a massive, curved bridge of seamless stone and crystal reaching toward a distant abyss.
Then the screen died permanently to gray noise.
"Save the raw telemetry," Hayama said, his voice cutting through the silence of the tent. "Triple-redundant backup on local hard drives. Do not route this through the surface network."
"Understood," the tech muttered, his fingers flying across the keys.
Hayama turned away from the dead terminal and looked out through the reinforced slit of the bunker. Across the river, the unmapped timber of Level Three stood quiet, dark, and motionless under the cavern ceiling.
He pulled a small notebook from his pocket and uncapped his pen. On the bottom of the fresh page, he wrote three unadorned words:
*EYE. GATE. NEST.*
He stared at the ink until it dried.
For three years, the science division had operated under the comfortable delusion that they were the hunters, methodically conquering an underground wild. But as he remembered the cold, faceted glare of those twin red stones, the truth became unavoidable.
They had not discovered the dungeon.
The door had simply been left open for them.
Outside, beyond the river crossing, the black timber swallowed the shadows, and far beneath the cold rock,
the Eye remained awake.