The demon lord advanced.

  Each step he took sent a tremor through the chamber, the stone beneath my boots vibrating like it was alive. Heat rolled off his massive frame in suffocating waves, thick enough to make the air shimmer. Any sane person would’ve been frozen in place by now, rooted by fear, crushed under the sheer pressure of his presence.

  But something caught my eye.

  Cracks.

  Thin at first. Hairline fractures spiderwebbing across the dungeon floor, branching outward from the impact points left behind by my slime’s earlier rampage. Where tendrils had punched through stone, where demons had been dragged screaming into the pit, the ground had been weakened, hollowed out and destabilized.

  The demon lord didn’t notice.

  Or didn’t care.

  He raised a clawed hand, molten runes flaring brighter along his skin.

  “You will not escape,” he said calmly.

  I didn’t answer.

  I ran.

  The moment I moved, the demon lord leaned forward, muscles coiling beneath his skin. The pressure skyrocketed as he planted his foot, preparing to leap.

  That was the moment the floor gave way.

  Stone shattered with a deafening crack. The ground beneath his foot collapsed inward, plunging into the pit below. The demon lord roared, the sound shaking loose entire chunks of ceiling as he dropped one leg deep into the fractured floor.

  “Now!” I shouted, more to myself than anyone else.

  The chamber began to crumble.

  The demon lord’s wings snapped open instinctively, vast, leathery things that might have carried him through the sky with ease under normal circumstances.

  But this wasn’t the open air.

  His wings slammed into pillars, tore through chains, smashed into the ceiling. Each impact caused more stone to collapse, more cracks to spread. The structure screamed as if the castle itself were dying.

  Prisoners surged forward, panic turning into desperate momentum. Cages toppled. Iron bars bent. People ran screaming through falling debris, slipping on blood and rubble but refusing to stop.

  I weaved through them, ducking beneath collapsing beams, leaping over fissures opening in the floor.

  Behind me, the demon lord tore himself free, half the chamber coming down with him. His wings snapped back in, molten eyes blazing with fury.

  “You insect!” he roared.

  A blast of heat washed over the hall, turning stone red-hot where it passed. I felt my skin blister, my lungs burn, but I didn’t stop.

  The exit loomed ahead.

  A massive doorway leading deeper into the castle, or out. I didn’t know which. I didn’t care.

  The demon lord slammed his fist into the ground.

  The impact sent a shockwave racing toward me, hurling bodies aside like dolls. I was thrown forward, skidding across stone, my shoulder screaming in protest as I rolled and barely managed to get back to my feet.

  I staggered through the doorway as the chamber behind me collapsed entirely.

  The roar of the demon lord echoed through the ruins, furious and unrestrained.

  I didn’t slow down.

  Didn’t look back.

  Whatever damage I’d caused wouldn’t hurt him. I knew that. A being like him didn’t die to falling stone.

  But it bought time.

  And time was everything.

  As I sprinted through the twisting corridors of the demon castle, one thought repeated in my head, equal parts disbelief and grim satisfaction.

  What a fucking brute.

  ==================

  Izanus watched in silence.

  The demonic mirror hovered before him, its surface rippling like black water as it reflected the chaos unfolding deep within the castle’s chambers. Stone collapsed. Fire flared. Prisoners fled like scattered ants.

  And at the center of it all-

  Colderon roared.

  The lesser demon lord flailed uselessly amid the destruction, wings striking pillars, claws tearing at stone as if brute force alone could correct his own incompetence. The mirror captured every humiliating angle: the collapsed floor, the fractured pillars, the human slipping away while Colderon wrecked his own domain.

  Pathetic.

  Izanus’s expression didn’t change, but the temperature in the throne room dropped noticeably. Flames lining the obsidian walls shrank, bowing away from his presence.

  A demon lord, outplayed by a human.

  Not even a mage.

  Not even a warrior of note.

  Just a powerless insect with sharp instincts.

  Colderon had always been a blunt instrument, useful for destruction, useless for precision. He ruled through fear and overwhelming force, incapable of understanding that intelligence was its own form of power.

  Izanus exhaled slowly.

  The demonic mirror shifted, tracking the human as he fled through collapsing corridors. For a brief moment, Izanus’s eyes narrowed, not in anger, but interest.

  Recording anomalies.

  He could feel it now. A faint distortion clinging to the human’s existence, like a foreign thread woven into the fabric of the world.

  Izanus rose from his throne.

  The obsidian seat cracked beneath the pressure of his aura, thin fractures spreading like veins through the stone floor. His wings unfurled slowly, deliberately, each movement precise and controlled, nothing like Colderon’s clumsy flailing.

  An elderly demon stepped forward from the shadows, his horns dulled with age, robes heavy with ancient sigils.

  “Heading out, my lord?” the elder asked, bowing low.

  Izanus didn’t look at him.

  “There is an eyesore in my domain,” Izanus said calmly. “One that has overstayed its relevance.”

  The demon swallowed.

  “Yes, my lord.”

  Izanus stepped onto the balcony.

  The night beyond stretched endlessly, a sea of ash clouds lit from below by burning cities and flowing magma. He spread his wings once, and vanished in a thunderous crack, leaving the air warped in his wake.

  The hunt had begun.

  By the time my legs finally gave out, I was barely conscious.

  Every breath burned. My vision swam, edges darkening as adrenaline bled out of my system, leaving only pain behind. My ribs ached every time my chest rose, and one of my ankles screamed whenever I put weight on it.

  I couldn’t run anymore.

  So I ducked into the nearest doorway I saw and slammed it shut behind me.

  The room was… useless.

  That was the first thought that crossed my mind as I scanned it in the dim light filtering through a cracked ceiling vent. Broken vases lay scattered across the floor, shattered into jagged porcelain pieces. Old brooms leaned against one wall, their bristles rotted and stiff with age. Crates filled with warped wood scraps, rusted tools, and things I couldn’t even identify were stacked haphazardly around the room.

  A storage room.

  Or a dumping ground.

  Perfect.

  I dragged a crate toward the door, wincing as my muscles protested. Another followed. Then a broken shelf. I stacked everything I could reach, creating a crude barricade just tall enough to crouch behind.

  It wouldn’t stop a demon.

  But it might buy me a second.

  I slid down the wall and sat on the dusty stone floor, my back pressed against the cool surface. My limbs trembled uncontrollably now that I’d stopped moving. Hunger gnawed at my stomach, sharp and persistent, but exhaustion outweighed it.

  I summoned my book and flipped to the slime’s page.

  Status: Dormant (Recovering)

  Not ready yet.

  Figures.

  I exhaled slowly and closed my eyes.

  Just a little time.

  If the slime recovered, I could send it out. Food first. Always food. After that, options. Always options.

  I leaned my head back against the wall.

  That was when the voice spoke.

  Achievement Acquired.

  My eyes snapped open.

  The words didn’t echo in the room, they rang inside my skull, clear and emotionless, like a system notification ripped straight out of a game.

  You have humiliated a Demon Lord.

  Unauthorized use: this story is on Amazon without permission from the author. Report any sightings.

  Rank Increased: Iron 4.

  For a second, I panicked.

  My heart slammed against my ribs as I jerked upright, scanning the room wildly. I pressed a hand against my temple, breathing hard.

  “Okay… okay…” I muttered. “Not a hallucination. Just… the system.”

  Slowly, carefully, I summoned my book again.

  The purple cover shimmered into existence.

  Where there had once been a single iron star, there were now four.

  My breath caught.

  “That’s… a lot,” I whispered.

  Iron rank wasn’t impressive, Giselle alone had silver and gold, but four iron stars meant something very important.

  I flipped to the first page.

  Record Size Limit: 40/10

  Forty points.

  Four times what I’d started with.

  A weak laugh escaped me despite myself.

  “All that trouble… and I get stronger for embarrassing him,” I muttered. “Figures.”

  My thoughts immediately went to slimes.

  They were cheap. Flexible. Ridiculously scalable if handled properly. My first slime had nearly turned into a dungeon boss just by eating corpses for a few hours.

  “Should I just get more slimes?” I murmured.

  The question stuck.

  Could I even do that?

  Did the book allow duplicate records? Multiple instances of the same creature? Or was it one record per concept? One slime only?

  I frowned and rubbed my chin.

  “That’s something I’ll need to ask… if I make it back,” I said quietly.

  The thought sobered me.

  For now, speculation didn’t matter. Survival did.

  I leaned back again, forcing myself to stay awake despite the heaviness creeping into my limbs. Sleep here would be dangerous, but exhaustion won eventually.

  Hunger woke me.

  It wasn’t subtle.

  My stomach cramped violently, a sharp, twisting pain that dragged me out of sleep with a gasp. My mouth was dry, tongue thick, head pounding.

  I groaned and pushed myself upright.

  “How long…?” I muttered.

  The room hadn’t changed. No footsteps. No shouting. No demonic roars shaking the walls.

  Good.

  I summoned my book again.

  The slime’s status had changed.

  Status: Recovered

  Relief hit me hard enough to make my shoulders sag.

  “Alright,” I whispered. “You’re up.”

  The slime emerged from the page silently, already compressing itself down to a small, semi-transparent blob. It pulsed once, like a heartbeat, awaiting instruction.

  “Food,” I said immediately. “Anything edible. Avoid attention. Come back fast.”

  The slime rippled in acknowledgment and slipped beneath the barricade, vanishing into the cracks in the stone floor.

  I waited.

  And waited.

  Hunger made time stretch painfully. Every minute felt like ten. My hands shook, and my thoughts grew sluggish, drifting toward dark places.

  I imagined demons finding me.

  I imagined Izanus landing in front of the door, tearing the room apart with a glance.

  I imagined dying here, alone, starving, forgotten.

  An hour passed.

  Then-

  The slime returned.

  It oozed back into the room and spat something onto the floor.

  A chunk of meat.

  Charred on the outside. Blackened and cracked, still faintly steaming.

  I stared at it for a moment.

  “…I’m not going to ask,” I decided.

  I tore into it with my hands, barely caring about taste or texture. It was tough, bitter, and smoky, but it was food. Warm food.

  I devoured it like an animal.

  When I finished, I leaned back, breathing hard, grease smeared across my hands and face.

  “That helped,” I muttered.

  Strength crept back into my limbs. Not much, but enough.

  I wiped my hands on my clothes and looked at the slime.

  “One more job,” I said quietly.

  The slime tilted slightly, tendrils twitching.

  “I need you to cause problems,” I continued. “Far from here. As much damage as you can. Focus on demons. Reduce their numbers.”

  I hesitated, then added, “Don’t die.”

  The slime pulsed once.

  Then it was gone.

  I slumped back against the wall, heart pounding.

  If this worked… if the slime could draw attention, thin their ranks, create chaos-

  I might actually escape this place.

  And if not…

  I closed my eyes.

  At least I wouldn’t go quietly.

  “You’re a hard man to find.”

  Edwin paused mid-step.

  The polished marble floor of the Cross-world Library reflected the endless shelves rising into impossible heights, each aisle stretching farther than the eye could follow. He straightened slowly and turned, already knowing who he’d find.

  Taric stood at the mouth of the aisle, broad-shouldered and immaculately dressed in a blue three-piece suit that looked more suited for a boardroom than a metaphysical archive. His posture was relaxed, but his eyes were sharp, always sharp.

  “Taric,” Edwin said, lifting his chin slightly. “What brings you skulking through my section, old friend?”

  Taric didn’t smile. “I heard you took in a new bookkeeper.”

  Edwin hummed thoughtfully and closed the ledger he’d been holding, sliding it back into place on the shelf. “Word travels fast. Or maybe the council’s gotten worse at pretending they don’t gossip.”

  “They tend to gossip when you do something unusual,” Taric replied. “And you taking on a recruit is unusual.”

  Edwin turned fully toward him. “I assume you’re not here just to reminisce.”

  “No,” Taric said plainly. “I want to know why.”

  Edwin leaned against a nearby desk, folding his arms. “Why what?”

  “You aren’t known for mentoring,” Taric said. “Especially not bookkeepers who just arrived at the library. Most new arrivals don’t even see you for their first few dives.”

  Edwin shrugged. “The council’s been pressuring me to take responsibility for a recruit for years now. This one was simply… available.”

  Taric’s eyes narrowed. “That’s not an answer.”

  “It’s the only one you’re getting.”

  Taric took a step closer. “You dropped him into a ruined world on his first story dive.”

  Edwin’s expression didn’t change.

  “That,” Taric continued, “isn’t standard practice. Ruined worlds are used for conditioning or punishment. Not introductions.”

  “It builds character,” Edwin replied dryly.

  “Or breaks it,” Taric countered. “You know better than anyone how many bookkeepers lose their will after their first ruined world.”

  Edwin waved a hand dismissively. “If someone’s spirit can be broken by a single dive, they weren’t cut out for the library anyway.”

  “That’s not how you used to think.”

  Edwin’s eyes flickered briefly, something unreadable passing through them before he smoothed it away. “People change.”

  Taric studied him in silence for a moment. Then he sighed. “Either way, nobody expects much from him.”

  That made Edwin pause.

  “Nobody?” he echoed. “No one placed a claim?”

  Taric shook his head. “Not a single one. Everyone’s too busy circling the other new arrivals, high compatibility scores, flashy personalities, obvious talent. Your recruit didn’t even have his handler present during his first dive.”

  Edwin straightened slightly. “No one’s monitoring him?”

  “Not officially,” Taric said. “As far as the library’s concerned, he’s background noise. A nobody thrown into a ruined world to die quietly.”

  Taric turned and began walking toward the exit. “No one’s even watching his progress.”

  Edwin let out a low chuckle.

  “Probably because the kid looks like a thug.”

  Taric stopped mid-step.

  “…Pardon?” He turned back slowly.

  Edwin pushed himself upright with a grunt, adjusting the cuffs of his suit. “Let’s not pretend appearances don’t matter here. The main requirement for being summoned to the library is simple, read obsessively, live in fiction, and don’t be a complete piece of shit.”

  Taric crossed his arms. “And?”

  “And that tends to produce a certain… aesthetic,” Edwin continued. “Skinny. Awkward. More imagination than muscle. And yes, mostly women.”

  Taric raised an eyebrow. “Are you stereotyping right now?”

  Edwin smirked. “Want me to remind you what you looked like when you first arrived?”

  Taric’s jaw tightened.

  “You know I’m right,” Edwin said, stepping past him. “There’s a reason this place doesn’t have a fucking bar.”

  Taric watched him go, shaking his head slowly.

  “Just don’t pretend this is coincidence,” he called after him. “If that kid survives…”

  Edwin didn’t turn back.

  “If he survives,” Edwin said calmly, “he’ll prove why I chose him.”

  And for the first time since taking on a recruit, Edwin smiled, not amused, but intrigued.

  “I didn’t expect much,” I muttered, my voice hoarse even to my own ears, “but I guess I’m dying here.”

  The words felt strangely hollow as they left my mouth, like I’d already said them a hundred times in my head. I slid down the wall until I was sitting on the cold stone floor, my back pressing against damp bricks that smelled faintly of mold and ash. The storage room I’d claimed as my hiding place was barely worthy of the name. Broken crates were stacked against one wall, their splintered wood crawling with dust and insect husks. Cracked ceramic jars lay scattered across the floor, their contents long since spilled or stolen. Rusted tools, hooks, chains, bent blades, hung from pegs or lay half-buried under debris.

  It was quiet.

  Not peaceful quiet. Never that.

  The castle itself groaned constantly, like a massive beast that never slept. Somewhere above me, stone scraped against stone. Far off in the distance, something roared, deep, guttural, angry. Occasionally, the sound of claws on stone echoed through the corridors, followed by harsh laughter or the wet crunch of bone.

  I pulled my knees closer to my chest and exhaled slowly.

  I was tired. Not just physically, though my body ached in places I didn’t even remember injuring. It was the kind of exhaustion that seeped into your thoughts, made every idea feel heavier than the last. Hunger gnawed at my stomach, a dull, persistent ache that had stopped being sharp hours ago and instead settled into something worse, something patient.

  My injuries hadn’t fully healed either. My head still throbbed where I’d been struck, and dried blood flaked from my temple whenever I moved too much. My hands shook faintly, though whether from hunger, adrenaline, or fear, I couldn’t say.

  The only thing keeping me alive was my slime.

  I summoned my book with a thought, the familiar weight settling into my hands. The cover flickered faintly as it materialized, its surface cool beneath my fingers. I flipped to the page without hesitation.

  Slime - Iron Rank

  Rating: 10

  Status: Recovering

  The status text pulsed softly, a slow rhythm that matched my own breathing. Every time the slime was torn apart, burned, crushed, ripped to shreds by claws or magic, it returned here. Not dead. Never dead. Just… withdrawn. Resting. Gathering itself back together within the record.

  That alone felt like cheating death.

  I closed the book and leaned my head back against the wall, eyes drifting shut for a moment.

  Since hiding here, my routine had become painfully simple.

  Wait.

  Summon the slime once it recovered.

  Give it orders, simple ones, as clear as I could make them.

  Watch chaos unfold from afar.

  Wait again.

  Each time, I sent it out through cracks in the walls, through broken vents and collapsed hallways. The slime would flatten itself, stretch thin, or condense into a small sphere, slipping through spaces no human ever could. It would ambush lone demons, collapse ceilings, tear into patrols that strayed too far from the main halls.

  And every time it met something stronger, something too fast, too tough, or too angry, it would be destroyed.

  And every time, it would return.

  At first, I’d thought it was working.

  I’d listened to screams echo through the castle. Felt the vibrations of collapsing corridors. Smelled burning flesh and stone dust drifting through the air. I’d even dared to hope, just a little, that if I kept this up long enough, the demons would thin out.

  That hope didn’t last.

  No matter how many times my slime went out, the number of demons never seemed to drop. If anything, there were more of them now. Or maybe they were just louder. More restless.

  They weren’t smart. That much was obvious.

  The demons of Calderon’s castle were brutes, hulking masses of muscle, claws, horns, and wings. They fought with overwhelming strength and raw instinct, not tactics. I’d heard them arguing constantly. Shouting matches that turned into brawls. Roars of rage followed by wet, meaty sounds that told me someone had lost a limb, or worse.

  More than once, I’d heard a demon die not to my slime, but to another demon.

  They weren’t organized. No formations. No patrol schedules I could rely on. Just chaos layered on top of chaos.

  Which made escaping both easier and harder.

  Easier, because no one was carefully watching every corridor.

  Harder, because there was no predictable gap. No moment of weakness I could exploit.

  I scratched at the floor with a broken shard of ceramic, dragging slow lines through the dust as I thought.

  I had resources.

  Very few, but not none.

  First: the slime. Iron Rank, Rating 10. Intelligent, or at least, intelligent enough to follow intent, not just commands. That alone made it abnormal. Dangerous, even.

  Second: time. As long as I stayed hidden and didn’t draw attention directly to myself, I wasn’t an immediate priority. The demons were too busy fighting each other, repairing damage, or rampaging elsewhere in the castle.

  Third: information. Every time I sent the slime out, I learned more. About the layout. About where demons gathered. About where they dumped corpses and trash.

  That last one was important.

  I opened my eyes and glanced toward the narrow crack in the wall near the ceiling, where faint torchlight flickered. Beyond that passage lay a vertical shaft, the hole where demons threw monster remains, broken weapons, and anything else they deemed worthless.

  The slime had fed well down there.

  Too well.

  I hadn’t checked its updated information yet, but I could feel it. The way the book’s presence felt heavier when I held it. The way the slime stayed recovered longer between summons, as if it was stabilizing at a higher baseline.

  Still not enough.

  Not enough to fight a demon lord.

  I swallowed hard.

  Calderon.

  Even thinking the name sent a chill through me. I hadn’t seen him directly, not up close again, but I’d felt him. The pressure in the air when he moved. The way lesser demons froze or scattered when his presence swept through a corridor.

  He was strong.

  Too strong.

  Which was why my plan didn’t involve fighting him.

  I needed to escape the castle entirely.

  I shifted, wincing as pain flared in my ribs. Slowly, carefully, I reached into my book again and flipped through the pages, reviewing what little I had.

  The slime.

  A few scraps of recorded materials, broken demon claws, fragments of armor, bits of bone. Nothing useful enough to be worth summoning yet.

  My rank: Iron 4.

  Forty record points.

  Still pitiful in the grand scheme of things.

  But more than I’d started with.

  I clenched my fist.

  “I just need one opening,” I whispered to the empty room. “One mistake.”

  As if in response, a deep, thunderous roar echoed through the castle.

  I froze.

  That sound wasn’t like the others.

  It wasn’t the mindless bellow of a rampaging brute or the shriek of a demon dying. It was… controlled. Heavy. The kind of roar that carried authority behind it.

  The air shifted.

  Dust fell from the ceiling in thin streams. The floor vibrated beneath me, subtle but unmistakable. Even from here, I felt it, a pressure pushing down on my chest, making it harder to breathe.

  My slime stirred inside the book, reacting before I did.

  “No,” I breathed.

  Another roar followed, closer this time, and then something else, wings.

  Not the frantic beating of lesser demons, but a single, powerful sweep that displaced air like a storm.

  The demons outside went silent.

  Not gradually. Instantly.

  The constant background noise of fighting, shouting, and destruction cut off as if someone had ripped it away. In its place came a heavy, oppressive quiet that pressed against my ears.

  Footsteps echoed.

  Slow. Deliberate.

  Each step sent a tremor through the stone, not because the floor was weak, but because whatever was walking on it was heavy enough to make the castle itself acknowledge its presence.

  My throat went dry.

  I didn’t need anyone to tell me.

  I knew.

  Izanus.

  The Demon Lord of Calamity had arrived at Calderon’s castle.

  I pressed myself tighter against the wall, barely daring to breathe as the footsteps drew nearer, each one a reminder of just how small I was.

  The game had changed.

  And I was still trapped inside the board.