Chapter — The Threshold of the DepthsArin stepped forward.
The ground beneath his boots felt different here—not softer, not harder… just heavier, as though the earth itself carried memory.
Behind him, the carriage wheels creaked once, then stilled. The driver was already calling out for the return trip, his voice blending into the layered noise of the place.
Arin did not look back.
His gaze moved forward.
And the world unfolded.
The space surrounding the structure was far from empty.
It was alive.
Carriages stood in uneven rows—some freshly arrived, others being loaded with crates, sacks, and reinforced containers stained faintly with things better left unnamed. A few were built sturdier than others, clearly meant for transporting materials rather than people.
Drivers called out destinations. Assistants hauled goods. Adventurers moved in and out with purpose.
Around the circular boundary of the structure, a sprawling outer market had formed—not chaotic, but not orderly either. Functional.
Weapon merchants displayed blades, spears, and shields openly, their metal catching the light. Potion sellers stood behind reinforced counters, their goods locked behind glass or iron grids.
"Low-grade healing—five silver! Don't wait till you're bleeding out!"
"Mid-grade! Fifty silver—last stock!"
The prices alone told the story.
Everything here cost more.
Convenience had a price.
Risk had a price.
And survival—
That had the highest price of all.
Arin's eyes shifted, taking it all in without pause.
Selling here would be quick.
But cheap.
Buying here would be immediate.
But expensive.
…Makes sense.
A system built not on fairness—but on urgency.
Beyond the merchant ring, he noticed other structures.
Taverns. Rougher than those in the city, louder, filled with voices that carried exhaustion, relief, or something darker. A few lodging houses stood nearby, guarded and heavily priced—temporary refuge for those who chose not to return immediately.
And everywhere—
Security.
Knights of the kingdom stood stationed at intervals, their presence unmistakable. Dark coats, marked with insignia that caught the light just enough to remind anyone watching who held authority here.
Some carried swords.
Others, long spears.
A few held coiled weapons at their belts—unfamiliar, but clearly not decorative.
They were not watching idly.
They were monitoring.
This place wasn't lawless.
But it wasn't safe either.
Arin's gaze lifted to the structure as he drew closer, and with each step, its presence seemed to deepen rather than reveal itself. Up close, it did not simply appear large—it felt disproportionate, as though its true scale refused to align with what the eye could measure. The surface bore the quiet marks of age, not worn down by time, but settled into it, as if it had always existed and simply allowed the world to gather around it. There was no grandeur in the way it presented itself, no attempt to impress—only a silent, indifferent permanence that made everything else feel temporary in comparison.
Without hesitation, Arin stepped forward and crossed the threshold.
The moment he stepped inside, something shifted—not in a way that could be seen or heard, but in a way that was felt. The space did not fracture or collapse; it simply unfolded, expanding beyond what should have been possible, as though the boundaries of the structure had quietly ceased to exist.
Arin halted for the briefest moment, not out of hesitation, but because what lay before him defied any expectation he had carried with him. This was not a matter of scale or illusion—it was something deeper, something fundamentally wrong in the way space itself should behave.
The interior space stretched far beyond what the outer structure could contain. Vast, open, and impossibly wide, as though the concept of distance itself had been rewritten within these walls.
Above him, there was no ceiling to contain the space. Endless and open, blue sky stretching into distance where birds moved freely, circling as if this place belonged to them as much as anything else.
The air moved freely through the vast expanse, carrying a natural flow that felt untouched, while light descended in clean, unbroken streams, illuminating everything with a clarity that should have been reassuring. And yet, nothing about it truly was. Every instinct in Arin's body resisted the illusion, warning him that what he stood within was not a natural formation, but something deliberately crafted—shaped with precision, sustained by power far beyond ordinary means. It was not simply a structure; it was a space folded into another, a reality contained within boundaries that should never have held it.
Arin let out a slow breath, his gaze steady as it moved across the impossible vastness before him.
"…So this is it."
—-----
"First time?"
The voice came from his right.
A knight stood there, spear grounded beside him, posture firm but not hostile. His gaze flicked once over Arin's attire, sharp and practiced.
Arin gave a small nod. "Yes."
The knight tilted his head slightly, then gestured forward.
"See that?"
At the center of the vast open ground stood a raised structure—a small, symmetrical pyramid of stone, its form precise and deliberate, with broad steps ascending from every side. It was not imposing in size, yet something about it drew the eye immediately, as though the space itself had been arranged around it.
At its peak, a flame burned.
It did not flicker wildly or waver in the wind. It held its shape with quiet certainty, steady and controlled, and even from a distance, its presence could be felt rather than merely seen.
"Go there first," the knight said, his tone matter-of-fact. "Offer your blood to the eternal flame. The dungeon won't recognize you otherwise."
Arin followed the direction of his gaze.
Beyond the pyramid, further ahead, the true scale of the place revealed itself.
The coliseum stood there—vast, immovable, and absolute. Its curved walls rose with a weight that felt less constructed and more declared, as though permanence itself had taken form in stone. Along the inner face of that enormous structure, openings lined the circumference in precise intervals.
At first, they seemed few.
Then he realised there were too many to count at a glance.
Doors were present, not in dozens but probably in hundreds.
Each one faintly illuminated, their glow subtle yet unmistakable, as though waiting in quiet patience for those willing to step through.
Arin simply moved forward, his focus settling ahead as his steps carried him toward the pyramid.
With each step, a subtle weight seemed to gather—not in his body, but in his mind. It was not pressure, not fear, but a quiet awareness that settled over him, as though something unseen had taken notice. Not eyes, not a presence he could point to—just a sense of being recognized in a way that defied explanation.
He reached the base and began to climb.
Each step was steady, deliberate, measured without haste or hesitation. By the time he reached the top, the flame stood before him, its golden light unwavering, its presence far greater than its size suggested.
He reached to his side and drew the dagger. The blade caught the light for a brief moment before he turned it inward and pressed it gently against his thumb. The cut was shallow and clean, just enough.
A bead of red surfaced.
Then fell.
One drop, then another, then a third—each slipping from his skin and descending into the waiting flame.
And in that instant, everything changed.
The fire reacted the moment his blood touched it. It did not erupt in chaos, nor did it lash out wildly—instead, it surged with sudden intensity, as though something dormant within it had been stirred awake. The golden hue wavered for a brief instant before shifting, deepening into a rich, vivid blue that carried a different kind of life altogether—quieter, yet far more profound.
The change did not go unnoticed.
A few nearby adventurers turned their heads, their attention drawn not by spectacle, but by recognition. Not all of them reacted, but enough did for the moment to ripple outward through the space.
"…New one."
"Another rookie."
"Let's see how long he lasts."
The remarks drifted across the open ground, neither loud nor concealed, spoken with the casual certainty of those who had seen this moment repeat itself countless times before.
Arin remained still, not out of hesitation, but because something within him had shifted the moment the flame changed. It was not a sensation that came from the outside world, nor something he could trace to any physical cause. It rose from within—faint at first, almost imperceptible, like a thread brushing against the edge of his awareness.
Thin. Subtle.
Yet impossible to ignore.
Something had connected.
Deep in his mind, beyond thought and beyond language, there was a quiet recognition—not a voice, not an idea, but a certainty that did not require explanation.
The dungeon… now knew him.
The flame gradually stilled, its movement settling into a quiet, unwavering burn. The deep blue remained, calm and constant, as though the brief reaction had already served its purpose. There was no lingering spectacle to it—only a silent acknowledgment, followed by a quiet indifference, as if whatever needed to be done had already been done.
Arin turned without a word and began his descent, his steps as measured as before.
He had made it halfway down when a voice cut through the air.
"Hey."
It carried a lazy edge, rough and unrefined, the kind that did not bother to mask its intent.
Arin did not slow. He did not turn.
"…You're new, right?"
The man stepped closer, just enough to make his presence known. Lean build. Slightly hunched posture. Eyes that moved too much—always calculating, always looking for opportunity.
"I can guide you," the man said, a crooked grin forming as he stepped slightly closer. "First floor. Safe route. Easy clears."
He let the offer linger for a moment before adding, almost casually, "For a price."
Arin did not acknowledge him. He continued walking as though the words had never reached him at all.
Behind him, the man clicked his tongue—a sharp, irritated sound that cut briefly through the surrounding noise.
"Tch."
He stepped back, the brief interest already fading from his expression.
"Suit yourself," he muttered. "Go get yourself killed."
There was no anger in it. No urgency. Only a flat, practiced indifference—the kind that came from watching too many step forward with confidence, only to disappear just as quietly.
Arin reached the final step and moved past it without pause, his path carrying him forward toward the coliseum.
Toward the doors.
Toward whatever waited beyond them.
He did not look back, nor did he slow his pace.
Because there was nothing left to prepare for.
Only the path ahead—
And the unknown that came with it.
Arin passed beneath the arch of the coliseum.
And the space within revealed itself fully.
The interior was vast—far larger than it had any right to be. At its heart stretched an open field of short, vivid green, a quiet contrast to the stone that surrounded it. The ground was not empty, however.
Adventurers were scattered across it.
Not in formation. Not in order.
Clusters here and there—some standing, some resting, some speaking in low tones. At a glance, there were easily thirty, perhaps forty of them within view alone. Some leaned against pillars, others checked their gear, while a few emerged from glowing doors along the inner walls, carrying the weight of whatever they had faced within.
It was not crowded.
But it was alive.
Arin's gaze moved across the structure, steady and observant.
He had read about this in the book Bestiary of the Known Depths that he had bought a few days back.
The descriptions had been detailed—but even so, they had not captured this scale.
His eyes shifted toward the right.
There it was.
He saw it clearly now.
A pillar stood along the inner curve of the coliseum wall, one among many spaced at measured intervals, each marking a path into the depths. Upon its surface, etched cleanly for all to see, was a single number.
1
And beyond it—further along the curve—other pillars followed, each bearing their own number in quiet sequence, guiding those who entered and those who returned. A simple system, deliberate in its design, ensuring that no adventurer would mistake one floor for another.
Clear.
Efficient.
Unmistakable.
Arin adjusted his direction and began walking toward it, his steps steady and controlled, his focus narrowing as the noise of the coliseum faded into the background.
And then—
A sound tore through the air behind him.
A deep, resonant roar.
Instinct moved faster than thought. Arin turned sharply, stepping back as his body reacted on its own.
And what he saw—
Stopped him.
A massive tiger.
Far larger than any natural beast he had ever seen. Its frame was powerful, its muscles shifting beneath golden-yellow fur marked with dark, clean stripes. Its jaws were slightly parted, breath visible as it let out a low, warning growl.
Its eyes were sharp and unblinking, carrying a clarity that spoke of awareness rather than mere instinct—something intelligent, something deliberate, watching rather than simply reacting.
And atop the beast sat a woman.
She carried herself with effortless control, seated firmly upon a fitted leather saddle secured to the beast. Her presence was striking, not merely in appearance, but in the way she held herself—balanced, composed, entirely at ease atop something that could tear through most men without effort.
Her skin held a warm, brown tone, her dark hair falling freely, and her gaze—when it shifted—was sharp enough to cut through distraction. Twin blades rested along her form, and a longer, curved sword was secured across her back.
An adventurer.
Not a novice.
Not even close.
She reached down, placing a hand on the tiger's head, her fingers pressing lightly into its fur.
"How many times," she said calmly, her voice carrying quiet authority, "do I have to tell you not to growl at strangers?"
The tiger huffed softly, the tension easing from its posture as it turned its head away, the earlier hostility fading as quickly as it had come.
Without another word, she guided it forward right past him.
Arin stood still for a moment longer, his gaze lifting as the pair moved ahead.
Just a brief glance from her side—measured, passing over him—taking in the cloak, the helmet, the stillness.
Then she looked away and guided the beast forward without another word, continuing on as though the moment had never held any significance at all.
Arin let out a slow breath, the tension easing from his shoulders as he watched them pass. The thought that formed in his mind lingered for a moment, unfinished—not because he could not complete it, but because there was no need to.
His gaze followed the tiger for a brief instant longer before drifting away.
I'm jealous.
The realization came quietly, without resistance or denial—simple, honest, and entirely his own.
I've always liked animals...
His gaze lingered briefly on the fading silhouette of golden fur.
...I wish I could've touched it.
A faint, almost amused breath left him.
Or had something like that of my own.
A movement caught his attention again.
From one of the distant doors, a group of adventurers emerged—laughing, talking, carrying gear marked with use. Among them, one rode out atop a horse, guiding it forward with practiced ease as the others walked alongside.
Arin's eyes narrowed slightly as the realization settled into place.
So mounts were allowed inside.
It made sense—the advantages were obvious. Transporting materials, carrying weight, conserving energy over longer runs. In a place like this, efficiency was not a luxury; it was survival.
Another detail, quietly noted and stored away.
He turned back toward the coliseum wall, his focus returning to the path ahead. The pillar marked with 1 stood where he had seen it, the faint glow of the doorway beside it steady and unchanged, as though it had been waiting all along for someone to step through.
Arin moved toward it with steady purpose, his steps measured and unbroken, carrying neither hesitation nor pause as he closed the distance.
The noise of the coliseum faded behind him—not disappearing, but becoming distant, irrelevant.
There was only the door now.
And what lay beyond it.
He raised his foot.
And stepped forward.
The moment his boot touched the surface, it passed through—not like stone, not like air, but like stepping into still water. A faint ripple spread outward from the point of contact, distorting the light for a fraction of a second.
He moved through and disappeared beyond the threshold.