David was halfway through the VIP preparation hall when every light in the Hub turned red.

  Not a gradual shift—an instantaneous state change, as if someone had swapped the rendering palette of the entire environment in a single frame. The warm white fluorescents snapped to emergency crimson, casting every surface in the color of fresh arterial blood.

  Air-raid sirens detonated from speakers he hadn’t noticed existed.

  [SYSTEM FORCED BROADCAST: REST PERIOD TERMINATED.]

  [Detected: Player No. 7749 exceeds peer-group strength parameters by a factor of 47.3.]

  [Initiating Cross-Tier Forced Draft.]

  [Original assignment: 2-Star Dungeon.]

  [Override: Reassigned to 3-Star Dungeon — "The Midnight Express."]

  [Main Quest: Survive until the train reaches the final station.]

  A circle of blackness opened beneath David’s boots—not a hole in the floor, but an absence of floor, as if the rendering engine had simply stopped drawing geometry in that region. The void expanded to swallow him.

  David didn’t resist. Resistance, he’d learned, was a resource expenditure that achieved nothing against System-level operations. He had exactly enough time to touch the storage ring on his finger—confirming the inventory was intact, that the food and water and medical supplies he’d purchased were still there—before the darkness took him.

  His last thought before transit was a programmer’s observation: a system that could override its own assignment algorithm based on player performance wasn’t just running dungeons. It was adaptive. It was learning.

  That was either very good news or catastrophically bad news, and David filed the question for later.

  ——————————

  The sound came first: the rhythmic, metallic heartbeat of steel wheels on steel tracks. Clack-clack. Clack-clack. A frequency so steady it could have been generated by a metronome.

  Then the smell: rust, mildew, old fabric, and underneath it all—faint but unmistakable—the chemical sweetness of formalin. The preservative used to keep dead tissue from rotting.

  David opened his eyes.

  He was lying on a narrow bunk in a sleeper cabin. The space was claustrophobic—two meters wide, maybe three meters long, with four bunks arranged in pairs: upper and lower on each side. A single yellowish wall lamp provided illumination so dim it was more of a suggestion than a light source.

  Lower right bunk: David. His assigned position.

  Lower left bunk: a heavyset teenager in a school uniform, curled on his side, trembling so violently the bed frame rattled. His eyes were squeezed shut, and his lips moved in a continuous, silent prayer. A first-timer. Probably drew a bad lot in the talent lottery.

  Upper left bunk: a bald man with a vertical scar running from his left ear to his jawline, sitting upright, turning a combat knife in his fingers with the practiced ease of someone who’d done it a thousand times. His eyes were hard, calculating. A veteran.

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  Upper right bunk: empty.

  David catalogued the room’s occupants in under three seconds, then turned his attention to the iron door at the foot of the bunks. A yellowed paper was taped to it: the rules.

  He activated True Sight. His pupils flickered gold, and the text on the poster shifted—the clean lines of the original rules separating from the faint, oily smears of polluted overlays like oil separating from water.

  Midnight Express Passenger Rules:

  Rule 1: Stick to your assigned bunk. Do not swap beds. Do not sleep in an empty bed.

  Rule 2: The train stops at dark stations. New passengers will board. Be polite. No matter what food they are carrying and eating, do not stare. Do not show disgust.

  Rule 3: Mental pollution saturates this train. If your vision blurs, or if your cabin mates appear to be growing additional organs, close your eyes immediately and pretend to sleep.

  Rule 4: At 1:00 AM and 3:00 AM, the food cart attendant passes through the corridor. Do not buy any food or water from the cart. Endure the hunger.

  Rule 5: If hungry, eat only food you brought yourself. [TRUE SIGHT: Second clause detected as polluted. Original text redacted. Consuming food offered by entities causes instantaneous cellular mutation.]

  Rule 6: The bathroom at the end of the car operates on a signal system. Enter only when the indicator is GREEN. If the indicator is RED and the door is ajar, do not look inside.

  Rule 7: The bathroom mirror shows no reflection. If a reflection appears, wash your face with cold water until it disappears. Do not leave the bathroom while the reflection is visible.

  Rule 8: The conductor checks tickets before lights out. Show only the front of your ticket. Never let the conductor see the back.

  Rule 9: When the train enters a tunnel and absolute darkness falls outside, do not turn your head toward the window. No matter what is pressed against the glass.

  Rule 10: There is no dining car on this train. If anyone invites you to "Dining Car No. 13," decline.

  David read the rules twice. The architecture was different from the haunted house—more complex, more layered. The haunted house had been a single enclosed environment with one primary entity and one boss-level admin. This was a moving ecosystem: multiple entity types, multiple sub-zones (cabin, corridor, bathroom, stations), each with overlapping rule jurisdictions.

  And the food restriction was the most elegant cruelty. Rule 4 denied the System’s food supply. Rule 5’s polluted clause tried to push players toward entity food. Without external provisions, hunger would degrade mental resistance, and degraded mental resistance would accelerate mutation. A slow, grinding attrition engine designed to break players who couldn’t be killed quickly.

  David touched his storage ring. Fifty cubic meters of preserved food, water, and supplies. In this dungeon, he wasn’t just well-equipped—he was playing a different game entirely.

  The scarred veteran on the upper bunk had been watching David read. "First time on a 3-Star?" he asked, his voice carrying the specific, flat affect of someone who’d already decided the new arrivals were dead weight.

  "First time on a train," David replied, not looking up.

  The veteran snorted. "Name’s Razor. Twenty-three dungeon clears, twelve of them solo. You’ll want to follow my lead if you want to see morning."

  David didn’t respond. He was still analyzing the rules, mapping the dependencies, building a mental flowchart of the dungeon’s logic.

  Then the train’s whistle screamed.

  Not a sound designed for human ears. A frequency that vibrated in the sinuses and the spine and the soft tissue behind the eyes. The whistle of a machine that had been running far longer than any machine should, powered by something that wasn’t coal or electricity.

  The train was slowing down. Outside the window, a thick black fog pressed against the glass like a living membrane.

  They were arriving at a station. The first new passengers were about to board.