Chapter 19: Descent into a ’Dungeon’

The convoy crossed the bridge in silence.

Behind them, the Rustborn fortress watched. Ahead, the King’s Road stretched into a wall of thick, yellowish fog that seemed to swallow the headlights whole.

The recruits stared at it. Even from fifty meters away, the fog looked wrong. It moved against the wind. It pulsed, faintly, like something breathing.

Darwin didn’t hesitate.

"All trucks, hard right," he ordered over the bracelets. "We’re not taking the main road."

The lead truck veered sharply, its tires crunching off the main road and onto a narrow dirt path that wound downhill through a field of dead, blackened trees. The other two trucks followed.

"Sir?" one of the soldiers asked over the radio. "The map says—"

"Map says King’s Road is direct," Darwin cut in. "Doesn’t say it’s safe. We’ve got the Rustborn’s secondary route... old maintenance tunnels under the ridge. We are going to take those."

Gio leaned forward in his seat. The maintenance tunnels. The Rustborn had offered to sell them a map to those tunnels. Darwin both paid for the toll and bought the intel too.

The dirt path narrowed, winding deeper into the dead forest. The trees pressed in on both sides, their trunks twisted and black, their branches clawing at the sky like the fingers of the buried. The air grew colder. The fog behind them thickened, swallowing the bridge from view.

Ten minutes later, the trucks stopped.

Ahead, half-hidden by a collapsed overpass, was a massive concrete entrance. It looked like the mouth of a subway station, its steel blast doors rusted open just wide enough for a truck to squeeze through. Above the entrance, faded letters read:

SECTOR 67 MAINTENANCE ACCESS - AUTHORIZED PERSONNEL ONLY

"Recruits, dismount," Darwin ordered. "We’re on foot from here. Tunnels are too narrow for the trucks. Soldiers’ll drive ’em to the secondary exit and meet us on the other side."

The recruits climbed down, their boots hitting cracked concrete. The tunnel mouth yawned before them, a black void that swallowed the truck headlights whole.

"Bracelets on scan. Standard formation, recruits in the middle. Nobody strays."

They entered the dark.

---

The tunnels were older than the apocalypse.

The walls were smooth concrete, lined with thick cables and rusted pipes that ran along the ceiling in neat rows. Emergency lights, long dead, hung at intervals. The air was cold and still, carrying the faint smell of oil and something else—something organic, like wet earth and rot.

Every footstep echoed.

"Scanners are going nuts," Reuben whispered, tapping his bracelet. The screen flickered with static, numbers jumping erratically. "Can’t get a stable reading."

"Too much old-world interference," Kojiro murmured. "Or too much bioenergy in the walls. Hard to say which."

Tabitha had gone fully invisible, her form flickering in and out of existence as she scouted ahead. Her electric whip crackled softly in the dark.

"It’s creepy," she whispered. "Like the walls are watching us."

"They’re not," Reuben said. "Probably."

"Probably?"

"Shut up, Tabs."

Gio walked near the front, his plasma handgun raised. His wasp construct hovered above his shoulder, its white glow casting long shadows on the walls. The 5% cost was worth it. In a tunnel this dark, having eyes in the air was the difference between walking blind and walking prepared.

’keep moving,’ he commanded silently.

The wasp darted ahead, its light cutting through the gloom. It swept left, then right, scanning the branching corridors. The tunnel system was massive. A labyrinth of old-world infrastructure, built to service the Sector Cities from beneath.

Most of the branches were collapsed. Blocked by rubble, flooded with stagnant water, or sealed behind rusted blast doors. But the main corridor stretched on, straight and dark, leading deeper beneath the ridge.

The wasp found something at the three-hundred-meter mark.

Movement.

Small. Fast. Multiple signatures.

Gio stopped. "There’s something ahead, three hundred meters. Multiple small targets."

The convoy halted. Soldiers raised their rifles. Darwin stepped forward, his bionic arm humming softly.

"Type?" he asked.

"F-Rank, maybe. Hard to tell with all this interference. They’re moving fast... too fast for the bracelet to lock on."

Darwin nodded. "Recruits, hold position. Soldiers, forward sweep."

The soldiers moved past the recruits, their plasma rifles casting pale blue light down the tunnel. Gio watched them go, his wasp still hovering ahead, tracking the movement.

Then the shooting started.

Short, sharp bursts of plasma fire echoed through the tunnel, followed by a chorus of chittering shrieks. The sound was too high. Too many.

"Contact! Cave dwellers, multiple hostiles!"

Gio ran forward, the recruits close behind.

The soldiers had formed a firing line at a junction. Before them, swarming down the walls and ceiling, were creatures the size of large rats. But they weren’t rats. Their bodies were pale and hairless, their eyes milky white and blind. Their jaws were elongated, filled with needle-thin teeth, and their claws were long and curved, designed for gripping stone.

Cave stalkers. Mutated descendants of something that had once lived in the dark.

"F-Rank! But there’s dozens of ’em!"

The stalkers were fast. They skittered across the walls and ceiling, dropping onto the soldiers from above. Plasma bolts tore through them, burning holes in their pale flesh, but more kept coming.

"Wasps!" Gio commanded.

Two glowing constructs materialized, their wings humming. They dove into the swarm, stingers driving into the stalkers’ flesh. The constructs weren’t strong enough to kill the creatures outright, but they were fast enough to distract them, to draw their attention, to buy the soldiers precious seconds.

A stalker leaped at Melody. She spun, her claws slashing, and tore it in half mid-air. Acidic blood sprayed across her tactical suit, sizzling.

"Damn things are acidic!" she hissed.

"Keep moving! Don’t let ’em surround us!"

The battle was brutal and fast. The stalkers weren’t strong. A single plasma bolt killed them. A solid strike from a mace or a whip crushed them. But they were fast, and there were too many of them.

Kojiro teleported into the middle of the swarm, his katana flashing. He cut down three stalkers in a single spin, then dissolved into smoke as a fourth leaped at him, reappearing behind the firing line.

"Kid, your wasps are buying us time," he called to Gio. "Keep ’em coming!"

Gio gritted his teeth. His Bioenergy was draining.

[Bioenergy: 58%]

He summoned two more wasps. Four total, darting through the tunnel, harassing the stalkers, keeping them off the soldiers’ backs.

The firing line held. Plasma bolts tore through the swarm, burning the pale creatures to ash. The wasps harried them from above, their stingers driving into flesh, forcing the stalkers to split their attention.

And then, as quickly as it had begun, it was over.

The last stalker fell, twitching, its pale body riddled with plasma burns. The tunnel fell silent, broken only by the soldiers’ heavy breathing and the drip of water from the ceiling.

"Clear."

Darwin lowered his rifle. He surveyed the carnage, his expression unreadable.

"Standard cave dwellers. F-Rank. Weak on their own, dangerous in numbers. They’re drawn to heat and bioenergy. We need to move fast. Noise’ll attract more."

The recruits nodded, their faces pale. The battle had been short, but it had been brutal. The tunnel walls were streaked with acidic blood, and the air smelled of burnt flesh and ozone.

Gio dismissed his wasps. The constructs dissolved into white light, and he felt the familiar drain.

[Bioenergy: 54%]

He pulled up his system panel.

[Host: Gio]

[Species: Human Mutant]

[Core: E-Rank]

[Bioenergy: 54%]

[Skills: Command (E-Rank)]

[Bioform Storage: 2/3]

Fifty-four percent. Still enough to summon the bear if he had to. But the drain was adding up. Every battle, every summon, every reconstruction—it all cost him.

’If I run into something bigger down here,’ he thought, ’I’ll need to be smart. Can’t just brute force it.’

The convoy moved on, deeper into the tunnels.

The corridor widened, then narrowed, then branched into a series of massive chambers. The walls were lined with old-world machinery—generators, pumps, filtration systems—all long dead. The air grew colder. The smell of oil and rot grew stronger.

And then the wasp found it.

Something large.

Very large.

The construct hovered at the edge of a massive chamber, its light barely penetrating the gloom. But Gio could see enough.

A shape. Coiled. Massive. Its body was thick as a truck, covered in pale, segmented armor. Its head was elongated, filled with rows of translucent teeth. Its eyes were milky white, blind, but its body was twitching, sensing.

Sensing them.

[System Alert]

[Bioform Detected: E-Rank Mutagenic Tunnel Serpent]

[Threat Level: High]

Gio’s blood went cold.

E-Rank. In a tunnel. In a space too narrow for the bear to maneuver.

"Commander. We’ve got a problem."

Darwin turned. "What is it?"

Gio swallowed. He pointed down the tunnel, toward the chamber his wasp was hovering near.

"Something big. E-Rank. And it knows we’re here."

The tunnel fell silent.

Then, from the darkness ahead, came a sound.

Low. Deep. A rumble that vibrated through the floor, through the walls, through their bones.

The sound of something massive, uncoiling.

Darwin’s expression didn’t change. But his bionic hand clenched into a fist.

"Fall back. Everyone, fall back. Now."