Chương 1: The Dungeon Wasn't Here Last Time

The last thing Jack Mercer remembered was walking into a dungeon. There had been nothing unusual about it. No emergency alert. No screaming party member. No Boss waiting on the other side. No mysterious Artifact, impossible Skill activation, or prophetic voice announcing that his life was about to become considerably stranger. Just another A-rank run. Jack had checked his equipment, confirmed the party roster, made sure his consumables were where they belonged, and stepped toward the gate.

Blue light swallowed his vision. Then nothing. Click. Jack opened his eyes. Click. He stared at the ceiling. Click. The ceiling fan above him rotated with a tiny mechanical hitch every third revolution. Jack did not move. He knew that sound. Not approximately. Not because old ceiling fans tended to develop similar problems. He knew that exact click. Jack had spent years listening to it while lying awake in this room. The fan had been replaced twelve years ago. His eyes narrowed. Slowly, Jack turned his head.

The faded poster on the opposite wall was back. The cheap particleboard dresser was back. The old dark-blue curtains his mother had eventually thrown away were back. The charging cable on the nightstand belonged to a phone model that had stopped being manufactured more than a decade ago. Jack sat up. Too quickly. His body moved wrong. Light. Weak. Young. His hand caught the mattress automatically. Jack stared at it. No calluses from fifteen years of sword work. No old scar across the base of his thumb.

No pale line on his wrist from the Glass Widow incident. His hand looked twenty-four. Jack got out of bed and crossed the room. The mirror confirmed the rest. Twenty-four-year-old Jack Mercer stared back at him. Short dark hair. No gray at the temples. No scar beneath his jaw. No accumulated evidence that the Dungeon Era had spent fifteen years repeatedly trying to kill him. Jack put both hands on the dresser.

"Okay." His voice was younger too. That was somehow worse. He reached for the old phone on the nightstand. The screen lit. Jack read the date. Then read it again. Dungeon Day One. Not approximately. Not the same month. Not the week before. The day. The morning the gates first appeared. Jack remained motionless for several seconds. He did not remember dying. That bothered him. His final memory was entering an ordinary A-rank dungeon. He might have died during the transition.

Something inside could have killed him before his memory formed. A Dungeon effect could have triggered. An Artifact. Somebody else's Unique Skill. The Dungeon System itself. There was no evidence. So Jack did not invent an answer. He turned on the television. Every channel had the same story. Blue structures had appeared across the planet. New York. London. Tokyo. Paris. Farms. Roads. Parking lots. Universities. Mountains. City centers. No one knew what they were. Authorities were establishing exclusion zones.

Governments were asking civilians to stay away. Experts were being interviewed despite having approximately the same amount of useful information as everyone watching them. Jack sat on the edge of his bed. Fifteen years. Gone. He had been thirty-nine. Level Eighty-Seven. A-rank. Not S-rank. Not one of the SS- or SSS-rank Delvers who existed in categories of their own, but close to the practical ceiling most ordinary high-level professionals would ever reach. He had money. Good equipment. A reputation.

Access to high-rank Dungeons that would have killed the younger man currently staring at the television. His first life had not been a failure. That made the situation stranger. There was no revenge he desperately needed to take. No ruined life to repair. No great humiliation to undo. Jack had started on Day One knowing absolutely nothing and had still reached Level Eighty-Seven. Now he was back at the beginning with fifteen years of knowledge. Jack looked down at his younger hands.

"There's no reason to stop at eighty-seven this time." Something at the edge of his vision shifted. Jack froze. He focused on the dresser. The familiar sensation answered. Appraisal. Jack stared. His Native Unique Skill. He had possessed it on the original Day One as well. Every human being had manifested a Unique Skill when the gates appeared, though plenty of people took hours or days to realize what theirs actually did. Jack had never needed a dungeon to activate Appraisal. The Skill was his.

The Level-and-Job architecture came later. He focused deliberately on the cheap dresser. A translucent window appeared. WOODEN DRESSER Type: Furniture Material: Particleboard / Laminate Condition: Worn Structural Integrity: Acceptable Jack exhaled.

"Still works." A-rank Appraisal. On Day One, that was absurdly valuable. Fifteen years later, routine identification had become infrastructure. Identification Contacts, public databases, commercial scanners, standardized monster catalogs—most ordinary information could be obtained without an Appraiser. This book was originally published on Royal Road. Check it out there for the real experience. Today, none of that existed. Jack opened the internet. Chaos. Not figurative chaos.

Actual, rapidly updating, multinational chaos. Livestreams. News clips. Conspiracy theories. Emergency broadcasts. People filming gates from apartment windows. People already walking past police barriers because human curiosity remained undefeated by common sense. One phrase appeared repeatedly. IRL MMO? Jack almost laughed. Close enough. This world had MMOs. RPGs. Levels, raids, Tanks, DPS, Healers, loot.

It had never developed the exact Dungeon-build culture Jack knew from the next fifteen years, because that culture had not needed to exist yet. People were reaching for the nearest vocabulary they had. A livestream caught his attention. A man with a rifle was inside a gate. Jack straightened.

"Idiot." The camera bounced as the streamer moved through a rough stone corridor. The chat raced past too quickly to read. Then a goblin appeared. Small. Green-skinned. Primitive weapon. Almost certainly F-rank. The streamer raised his rifle. Jack knew what happened next.

"Stop shooting." The man fired. The goblin was knocked backward. The livestream chat exploded. The creature hit the ground. Then stood back up.

"Stop." More shots. More physical impact. The goblin fell again. Again it rose. The streamer began backing away. Jack watched the distance close. He knew exactly why the bullets were failing. The rest of humanity did not. The goblin rushed. The camera spun. A blur of stone. A scream. The livestream ended. Jack stared at the black player window. Fifteen years ago, thousands of people had needed to learn that lesson. Earth weapons were not all equal under Dungeon rules.

A directly held object could be carried into a person's System interaction strongly enough to hurt low-level Dungeon monsters. A projectile that left the user generally could not. The detailed mechanics would take researchers years to argue about. The Day One version was simpler. Gun bad. Knife good. Another video was already spreading. Different gate. Different people. A handgun failed to put down a small monster. One terrified man dropped it, drew a camping machete, and swung. The blade connected.

The monster dissolved into gray ash. Jack watched the comments explode. BULLET BAD KNIFE GOOD??? There it was. Humanity had begun science. Badly. But it had begun. Jack created a new account. GateGuide He typed: Normal firearms are not dealing meaningful damage. Knockback is not the same thing as killing the target. If you absolutely insist on entering, use handheld melee weapons. Knives, axes, machetes, spears—anything you can keep physical contact with.

Do not assume something is dead because bullets knocked it down. He posted it. The first reply appeared almost instantly. FrostMage92: source? CoinFlipKing: bro made an account 40 minutes after aliens arrived and named himself GateGuide RifleGuy1776:"meaningful damage" bro thinks reality has a combat log Jack smiled faintly. They would learn. His phone rang. Mom. Jack stopped smiling. He answered.

"Hey."

"Jack? Are you home?" Her voice. Younger. Not dramatically. Fifteen years was not enough to make someone unrecognizable over the phone. It was enough for Jack to hear it. His mother had aged well. His father too. They had both been alive yesterday. Yesterday for him. Neither had been sick. Neither needed saving. But Jack had fifteen years of memories with people who currently did not share any of them. Birthdays. Arguments. Dinners. His father's terrible opinions about Dungeon insurance.

His mother's insistence that every high-rank run was "probably unnecessary." All gone from their side.

"Yeah," Jack said after a moment.

"I'm home."

"Good. Stay there. Your father and I are fine. They're showing those blue things everywhere on the news."

"I saw."

"Don't go near one." Jack looked out toward the backyard.

"I won't go looking for one." Technically true. His mother continued talking. Jack listened longer than he normally would have. When the call ended, he stayed seated for another few seconds. Then he went downstairs. The old Mercer house was bigger than one person needed. That had been true at twenty-four too. His parents had moved into a newer house less than an hour away and let Jack stay here rather than immediately sell the old place. Three bedrooms. Basement. Two-car garage. A broad backyard.

And an old storage shed that his father had accumulated too many tools to actually demolish. Jack made coffee. He took a sip too early. Hot. He stared at the mug for a second. No Perfect Temperature. That had belonged to someone else anyway. Jack set the coffee aside. Then blue light flashed across the kitchen wall. He stopped. It vanished. Jack turned toward the window. There. Again. Faint blue illumination from the backyard. Jack moved immediately.

He crossed the kitchen, opened the back door, and stepped outside. The light came from the shed. Jack slowed.

"No." He knew this property. He had known it for decades. There had never been a Dungeon here. Not on Day One. Not one year later. Not fifteen years later. Jack crossed the yard and opened the shed. Blue light filled the interior. A Dungeon Gate stood where an old stack of gardening equipment should have been. Jack stared. The gate did not belong here. That fact mattered more than the gate itself. He activated Appraisal.

LAYERED DUNGEON Status: Unclaimed Current Accessible Layer: 1 Current Threat Rank: F First Clear: Available Known Depth:??? Total Layers:??? Origin: UNKNOWN Jack read the final line twice. Appraisal A did not often answer with UNKNOWN. Not at F-rank. He focused harder. Nothing changed. Layered Dungeon. Rare. Extremely valuable. Not unique, but prized even fifteen years from now because one permanent gate could support Delvers across multiple stages of progression.

The upper Layers might remain F-rank while deeper sections rose to E, D, C, or beyond. One property. One gate. Potentially years of usable Dungeon depth. And this one had not existed in his first life. Jack stepped closer.

"Did you bring me back?" The gate said nothing. No System message. No mysterious voice. No helpful god descending to explain the plot. Just blue light. Jack waited. Nothing.

"Fine." First problem. The light was visible outside. Jack moved. He found an old blackout tarp, boards, tape, and whatever else the shed could provide. He covered the small window first, then the worst gaps in the wooden walls. He stepped outside. Checked the neighboring properties. The road. Upstairs windows. Sightlines. Then went back inside. Much better. Day One had no mature Dungeon property law. Jack knew what the law would eventually become in his original timeline.

That did not mean he intended to bet a private Layered Dungeon on history repeating perfectly. Especially when this gate itself was proof that history already wasn't. For now, nobody needed to know. Jack looked at the portal. Then down at himself. T-shirt. Jeans. Socks.

"Right." He had no equipment. Fifteen years of Dungeon experience had taught Jack many things. One of them was that people greatly overestimated how glamorous beginner equipment needed to be. His garage had no Dungeon sword. No Mana-forged armor. No Life Flasks. It did have tools. Jack changed into work boots, heavy jeans, and a thick jacket. Gloves. Flashlight. Phone. Then weapons. An ordinary kitchen knife would work if he kept physical contact with it.

It would also require him to stand within kitchen-knife distance of a monster. No. Jack found an old wooden tool handle. Carving knife. Hose clamps. Heavy tape. Several minutes later, he held something that technically qualified as a spear if nobody with historical weapons expertise was allowed to inspect it. Jack tested the binding. Again. Then harder. It held.

"Good enough." Not good. Good enough. He enabled recording on his phone. Not for the internet. For himself. If something behaved differently from the first timeline, he wanted evidence. Jack returned to the shed. The gate waited exactly where he'd left it. He took one last look at the ridiculous spear. Then stepped through. The transition lasted less than a second. Blue light. Cold air. Stone beneath his boots. A System window opened immediately.

SYSTEM CONNECTION ESTABLISHED Jack Mercer Level: 1 Life: 61 / 61 STR: 14 DEX: 14 INT: 14 Job: Unassigned Skill Gem Slot: Locked Native Unique Skill: Appraisal — A Jack read it once. Exactly as expected. The connection had not given him Appraisal. It had registered him into the part of the Dungeon System that governed Levels, Life, Attributes, Jobs, and Skill Gems. Another message appeared. LAYER 1 Threat Rank: F Jack looked down the corridor. Rough stone walls. Faint blue illumination without any visible source.

Simple layout. Beginner territory. Jack had fought monsters that could demolish buildings. He had fought Bosses requiring coordinated A-rank parties. He had spent fifteen years learning how to read combat. He took three steps forward. Scratching came from the darkness. Jack raised the spear. A rat the size of a medium dog emerged. Appraisal. BURROW RAT Level: 1 Life: 18 / 18 Damage Type: Physical Threat Assessment: Minimal Jack almost laughed. Then the rat moved. His amusement disappeared. He knew the attack.

The weight shift. The crouch. The exact moment it would jump. Jack stepped aside. Too late. Teeth clipped his forearm. The supernatural protection of Life absorbed the injury before flesh tore, but the impact still hurt. Life: 61 → 55 Jack stared at the number. Then at the rat.

"Right." His mind remembered Level Eighty-Seven. His body was Level One. Knowing an attack was coming meant very little if his legs did not move as far or as fast as his instincts expected. The rat crouched again. This time Jack adjusted. Smaller movement. Earlier start. No attempt to perform the counter his old body could have managed. The rat jumped. Jack moved. The spear thrust. The carving knife entered the creature's chest. The rat collapsed into gray particles.

BURROW RAT DEFEATED Experience Gained A small blue crystal struck the floor. Jack crouched. Picked it up. Appraisal. F-RANK MANA STONE Rarity: Common Type: Material / Energy Source Purity: 68% Mana Capacity: Low Jack turned it between his fingers. There it was. The resource that would rebuild the world. Right now, nobody outside the gates even knew what to call it. Jack put the Stone in his pocket. Then checked his Life. 55 / 61 No Life Flask. No healing Skill. No Portal Scroll.

He could leave whenever he reached the entrance, but that was all. Jack established a rule. Forty. If his Life dropped to forty, he left. No exceptions. No Floor Guardian. No curiosity. Future knowledge did not make bad resource management intelligent. He continued. The second Burrow Rat died without touching him. The third was easier. By then, Jack had begun recalibrating. Fourteen DEX. Fourteen STR. Shorter reach. Slower acceleration. His body was not wrong. It was simply new.

Then something larger stepped into the corridor. SCRAP GOBLIN Level: 2 Life: 31 / 31 Weapon: Scrap Blade Threat Rank: F The goblin rushed him. Jack read the attack perfectly. He moved correctly. Almost. The scrap blade caught the edge of his jacket and slammed into his side. Life: 55 → 49 Jack grunted. Still above forty. The goblin raised its weapon again. Jack shortened his grip on the spear. This time, he stopped trying to fight like the man he had been yesterday. He fought like the body he had now.

The next swing missed. Jack thrust. The goblin staggered. Second thrust. Gray ash. SCRAP GOBLIN DEFEATED Experience Gained Something remained on the floor. Not blue. Metal. Jack stared. A sword. Rust covered much of the blade. The grip was wrapped in cheap dark material. One edge looked like it had spent several years losing arguments with rocks. Jack picked it up. Appraisal. RUSTED SWORD Rarity: Common Item Level: 1 Required Level: 1 Physical Damage: 6–10 Condition: Poor Jack smiled.

"Beautiful." Dungeon junk. Which meant it was better for this purpose than a thousand-dollar Earth-made blade. He tested the balance. Bad. Still better than the spear. Jack looked at the kitchen knife tied to the wooden handle.

"Thank you for your service." He lowered the spear. Then paused. Looked at the dark corridor ahead. Looked back at the spear. Jack picked it up again.

"You're still coming." Reach was reach. He continued carrying both. A few minutes later, the corridor opened into a broader passage. A System message appeared. FIRST CLEAR IN PROGRESS Floor Guardian: Alive Jack stopped. His Life remained: 49 / 61 He looked toward the darkness ahead. Somewhere beyond it was the Floor Guardian. He could probably kill it. Probably. Jack had fifteen years of experience. He had Appraisal. He had a Dungeon sword now.

He also had no healing, no armor worth mentioning, and less than eighty-one percent of his Life remaining. The younger version of Jack Mercer might have interpreted reaching the Boss room as an invitation. The thirty-nine-year-old veteran inside his head interpreted it as information. Jack turned around.

"No." The Floor Guardian would still be here later. And if it wasn't? Then this Dungeon was even stranger than he thought. Either answer was worth surviving to learn. Jack headed back toward the entrance carrying a Mana Stone, an improvised spear, and the worst Dungeon sword he had seen in years. It felt fantastic. Blue light waited at the end of the corridor. Beyond it was his backyard. His old house. A world that still had no idea what had arrived.

Jack stopped before stepping through and looked once at the Mana Stone in his hand. In his first life, he had learned everything the expensive way. Bad purchases. Bad Skills. Bad assumptions. Bad routes. Bad builds. Information paid for in money, blood, and years. He had still reached A-rank. Level Eighty-Seven. This time, the world was on Day One. So was Jack. Only one of them already knew the meta. He stepped through the gate.

"Let's do it properly this time."