The dungeon entrance was a loading dock.

  Not a converted loading dock, not a ruin repurposed by time and mana into something unrecognizable - an actual, functional loading dock, complete with a rusted roll-up door frozen at three-quarters open, a concrete platform stained with decades of oil and corrosion, and a faded sign bolted to the wall that read **HARKWELL & SONS INDUSTRIAL FABRICATION - RECEIVING** in pre-Unveiling block letters that had survived the centuries better than the civilization that painted them.

  The Boilerworks sat in the eastern margin of the Dungeon Sector, wedged between a potion wholesaler and a decommissioned mana-relay station. From the outside, it looked like what it had been: a factory complex, three connected buildings of reinforced concrete and steel, the kind of brutalist architecture that the old world had built to last. The old world hadn't anticipated mana, of course. But the buildings had soaked it up the way everything else had, and sometime during the Dark Age, the factory's basement levels had cracked open into a Stable Dungeon formation that connected to a pocket of industrial-aspected mana deep beneath New Chicago's foundations.

  Now it was a commercial delve. Entry fee: forty credits per party member. Loot rights: standard split, minus the house's fifteen percent processing fee. Three floors, rated for parties of four at Level 5 through 8. Monsters were industrial-themed - creatures shaped by the mana pocket's resonance with the factory's original purpose. Steam, metal, heat, pressure. The Boilerworks attracted working adventurers who wanted steady income without the volatility of Wild Dungeons, and students who wanted real combat experience without the commute to a frontier Stable.

  Jace counted out a hundred and sixty credits - most of what he'd saved from Corvin's shop, every copper he could spare - and handed them to the bored-looking clerk at the registration desk. The clerk was a heavy woman with [Appraiser] calluses on her fingertips and the thousand-yard stare of someone who'd seen too many under-leveled idiots walk through that loading dock and not enough of them walk back out.

  She glanced at the party registration form. Her eyes moved from line to line with the mechanical efficiency of someone who'd read ten thousand of these.

  "[Vagabond], Level 5. [Brawler], Level 5. [Medic], Level 5. [Scribe], Level 5." She looked up. "All Normal-tier?"

  "Yes ma'am."

  "No Tank class."

  "No ma'am."

  "No dedicated Controller."

  "We manage."

  The clerk's expression didn't change, but something shifted behind her eyes - the slight recalculation of someone adjusting their expectations downward. She stamped the form, slid it back across the counter, and said, "Floor one monsters are Level 4 to 6. Floor two, Level 6 to 8. Floor three is a boss chamber, Level 8. Refresh cycle is forty-eight hours - the floor populations will be at full density. Emergency extraction beacon is on the wall inside the entrance. Pull it and a response team enters within three minutes. Response team deployment costs four hundred credits, deducted from your Guild account or billed to your academy." She paused. "You're academy students?"

  "Ironhold. Sophomore year."

  "Does your academy know you're here?"

  Jace produced the second document - the independent delve authorization that Thresh had signed, grudgingly, after Jace had presented a written operational plan, a risk assessment co-authored by Elara, and a promise that they would pull the extraction beacon at the first sign of a fight they couldn't win.

  The clerk examined the authorization. Held it up to the mana-lamp to check the seal. Set it down.

  "Floor three boss is a Pressure Golem. Semi-sentient construct. Hits hard, absorbs kinetic energy, releases it as steam detonations. If your [Brawler] punches it, the Golem gets stronger. Think about that before you reach the boss room."

  "We will."

  "Infirmary is across the street. They give a ten percent discount to delvers who walk in under their own power." She slid four wristbands across the counter - thin strips of mana-reactive metal that would track their position inside the dungeon for the extraction team's reference. "Good hunting."

  * * *

  The loading dock ramp descended into a receiving warehouse that had been swallowed by the dungeon's formation. The ceiling was high - ten meters of open industrial space supported by I-beam columns wrapped in crystallized mana deposits that pulsed with a dull amber light. The floor was poured concrete, cracked and heaving where mana-growth had pushed through from below, creating ridges and depressions that turned flat ground into broken terrain. The air was hot. Not the humid heat of the Sunken Subway's flooded tunnels - this was dry, radiative heat, the kind that came off forge-fires and smelting furnaces, pressing against exposed skin like an invisible hand.

  The ambient mana here had a *texture* Jace hadn't encountered before. He activated [Mana Sense] and felt it immediately - a dense, pressurized field that tasted of copper and char, vibrating at a frequency that resonated in his molars. Industrial-aspected mana. The dungeon's personality was stamped into every particle: this place had been built to make things, and the mana remembered.

  "Temperature's climbing," Mara said, already unbuttoning her jacket's collar. "Ambient heat plus mana density - dehydration is going to be a factor. Everyone drink now. Torrin, you especially. Your mass means you lose fluid faster."

  This book was originally published on Royal Road. Check it out there for the real experience.

  Torrin took a long pull from his canteen without argument. He'd learned to listen to Mara on medical matters the way she'd learned to listen to Jace on tactical ones - not because rank demanded it, but because competence earned it.

  Elara had her notebook open before they'd gone twenty meters. Her pen moved in quick, precise strokes, mapping the warehouse's layout and annotating mana density readings. "The industrial aspect will influence monster types and behaviors," she said. "Creatures here will be adapted to heat and metal environments. Expect resistances to fire and blunt-force trauma. Vulnerabilities likely skew toward cold, precision damage, and disruption of mana-flow - the same principles that shut down enchanted machinery."

  "Which means my fists might bounce off," Torrin said. He'd left his Iron Crawler Gauntlets in his pack for this run - Elara's pre-delve analysis had flagged the thermal conductivity of bare metal as a liability in a heat-aspected dungeon. Instead, he wore mana-hardened cloth wrappings over his knuckles and forearms, treated with a fire-resistant salve Mara had sourced from the infirmary. Less striking power. Less chance of his hands cooking inside his own gear.

  "Your fists will *always* work on joints, seams, and structural weak points. The carapace - or whatever passes for armor on constructs - will be the problem. Don't hit the thick parts. Hit the connections."

  "I know. I'm saying it out loud so I don't forget when something big is trying to kill me."

  Jace smiled despite himself. Six months ago, Torrin would have charged headfirst and worried about technique after the collision. Now he was pre-planning target selection. The training was sinking in - not replacing his instincts, but *informing* them.

  "Formation," Jace said. "Same as the Subway run. Torrin forward, me on his right flank, Elara and Mara at ten meters. I'll keep [Mana Sense] running in pulses for early detection. Call-outs by hand signal until contact, then voice. Elara - inventory check?"

  "Sixteen rune-strips." She'd been prolific over the break, her access to the Forge Quarter and Corvin's material contacts expanding her production capacity. "Four binding, three flash, three concussive, two thermal-release, two disruption, and two experimental slow-field variants I finished yesterday."

  "Experimental meaning untested?"

  "Experimental meaning theoretically sound but lacking field validation data."

  "So untested."

  "I prefer my phrasing."

  "Noted. Don't use the experimentals unless I call for them." He drew the Subway Fang and felt the familiar weight settle into his grip - light, quick, an extension of his hand rather than a burden on it. The blade's *Vermin Bane* passive wouldn't help against constructs, but the AGI-aligned enchantment would keep his strikes fast and precise. "Let's move."

  They moved.

  * * *

  The first floor of the Boilerworks was a network of factory rooms connected by corridors that followed the original building's layout - production lines, storage bays, and machine shops converted by mana into hunting grounds. The machinery was still here, in mutated form: lathes and presses and cutting tools fused with mana-crystal growth, their metal bodies sprouting impossible geometries of amber and copper-colored crystal that hummed with stored energy. Some of the machines still *moved* - gears turning slowly, pistons cycling with no input, conveyor belts crawling forward carrying nothing, the dungeon's mana animating dead industry like a phantom workforce that had never stopped its shift.

  The first encounter came in a machine shop.

  Three Slag Drones - semi-molten constructs the size of large dogs, their bodies a patchwork of fused metal scraps held together by a core of superheated mana. They moved with a lurching, dripping gait, leaving trails of cooling metal on the concrete behind them. Their attacks were simple: close distance, slam, burn.

  Torrin met the first one with [Immovable Stance] - a technique he'd been developing since the training sessions during break, formalizing the instinct he'd discovered during the Brine Warren into a repeatable defensive posture. Feet planted wide. Weight dropped low. Core braced. When the Slag Drone slammed into him, the force distributed through his legs into the floor the way water dispersed through a delta - everywhere at once, nowhere with enough concentration to move him.

  The Drone's molten surface scorched his wrappings. The heat-resistant treatment absorbed the worst of it, turning lethal burns into uncomfortable warmth. Torrin grunted, grabbed the Drone by its partially solidified neck-joint, and *squeezed*. The wrappings glowed faintly as they took the heat. The joint crumpled. The Drone's core destabilized and it collapsed into a sizzling pile of scrap and dying embers.

  Jace took the second Drone with a combination he'd been drilling for weeks - [Footwork: Evasion] to sidestep the slam, a pivot into the creature's blind flank, and a precision thrust with the Subway Fang into the gap between two fused metal plates where the mana-core pulsed brightest. The blade punched through. The core cracked. The Drone shuddered and went still.

  The third Drone lunged for the backline.

  Elara didn't flinch. She'd positioned herself with clear sightlines to three approach vectors - a habit she'd developed during the Subway and Brine Warren runs, treating the battlefield like a chessboard and herself like a piece that controlled the most squares from the right position. The concussive rune left her hand in a flat arc that struck the charging Drone center-mass. The detonation wasn't fire or light - it was force, a fist-shaped pulse of compressed mana that hit the Drone like a battering ram and knocked it backward three meters, its molten body scattering sparks across the concrete.

  The Drone staggered upright. Elara hit it with a second concussive strip. This time the force cracked the creature's structural integrity - metal plates separating, mana-core exposed. Torrin was already moving. One hammerblow to the exposed core, and it was over.

  "Three for three," Jace said. "No injuries. No healing needed. Time from first contact to last kill?"

  "Twenty-two seconds," Elara said, checking the mana-reactive timer on her wristband. "Down from forty in the Subway."

  "Faster." Torrin examined his wrappings. Singed but intact. "Getting faster."

  They were. And it wasn't just speed - it was *synchronization*. Six months of training together had built something that went beyond hand signals and call-outs. They moved like a system now, each person's actions creating space for the others. Torrin's wall created Jace's flank. Jace's flank created Elara's angle. Elara's control created Mara's safety. The roles were fluid, but the geometry was consistent.

  They cleared three more rooms on the first floor - two Slag Drone packs and a nest of Cinder Mites that Elara handled alone with a single flash rune and a contemptuous look. The Experience accumulated steadily, each kill adding its warm trickle to the slow river flowing toward the next threshold.

  The stairwell to the second floor was a freight elevator shaft, the elevator car long gone, the shaft converted by the dungeon into a vertical passage lined with cooling pipes that radiated waves of heat. They descended on iron rungs welded into the shaft wall, the temperature rising with every meter.