When Ludger reached the Guild Quarter, it was almost disappointingly ordinary at first glance. Wide stone avenues. Clean fences. Three-story guild halls with banners of sword and quill. Lanterns burned soft blue flames along walkways, illuminating polished cobbles that reflected night mist like wet glass.

It could have been any wealthy district in the empire, organized, quiet, respectable.

But Ludger had learned something important over the past year:

The cleaner a place looked, the dirtier it usually was beneath.

He crouched on the ridge of a warehouse roof, cloak folding with him like a second shadow. Below, adventurers moved in and out of buildings with casual ease, laughing, trading, arguing over prices like nothing was wrong.

Some carried runic axes over their shoulders. Others wore gauntlets humming with low mana. A few even strolled with full-body armor pieces that flickered with defensive light.

It made sense, guild members needed gear. But something was off. There were too many runes. Too advanced. Too standardized. Too similar to what pirates used.

Then Ludger’s gaze slid to the corners of the plaza.

And he froze, eyes narrowing behind his helmet’s slit.

Stone figures stood at intervals, shaped like armored warriors holding halberds. Their features were worn, style outdated by decades, maybe centuries. Most people probably assumed they were sculptures from some old war. But Ludger stared longer.

Their joints had faint seams. Mana core engraving lines were hidden beneath moss.

Their feet weren’t embedded in stone, they stood on it. Constructs. Dormant in appearance. Awake in truth. Sentinels.

Ludger felt his pulse settle, brain sharpening like a sword being honed.

If he stepped onto the ground, they might track vibrations. If he used Seismic Sense, his mana pulse would brush against them and they’d feel it instantly, like plucking a string connected to an alarm bell. Smart. Very smart.

Someone didn’t want intruders mapping the area.

He watched one golem carefully. Still as a corpse. But then, when a patrol guard passed, a tiny mana flicker flashed through its runes, like a heartbeat syncing with a nearby beacon. Not enough for a civilian to notice. But Ludger saw it.

Active. Responding to triggers.

He counted them. Six visible in the open plaza. Could be more hidden in alleys, behind gates, inside halls. Each could tear through a squad if awakened.

He shifted lower, shadowing his presence, and studied routes between rooftops, spots where he could descend unseen. Every window, balcony, and gutter pipe became a foothold in his mind.

People chatted in the square, oblivious. Merchants haggled over monster cores under soft lamp-light. A bard played lute music outside a tavern, fingers quick and bright. Normal. Peaceful. Underneath? Possibly storage rooms full of shackles. Slaves with shock collars.

Runic workshops building weapons for war. Ludger’s jaw clenched.

Looks normal, he thought. That’s exactly the problem.

He settled deeper into the shadow of a tile eave, planning the next step.

He couldn’t ping mana widely. Couldn’t use earth magic to sense underground tunnels, not yet. First he needed a blind spot. A dead zone in the sentinels’ perception. Somewhere he could slip inside unnoticed.

His target wasn’t the front gates or the main halls. It was the place nobody watched. Where truth was always hidden. The basements. The back alleys. The cracks between walls where filth gathered.

Ludger took a slow breath, night air heavy with forge-smoke. If he was right, the underworld wasn’t in some shady tavern. It was right under the guild’s nose. And he was about to cut it open.

Ludger didn’t rush.

He stayed crouched among chimneys and fog for several minutes, eyes fixed not on people,  but on stone sentinels that most wouldn’t notice twice. He studied the way their runes dimmed and flared, how their stance never changed, yet their awareness clearly did.

He wanted patterns. Triggers. Weak points. And soon, he found them.

A merchant wagon rolled through the edge of the quarter, wheels clattering, horse panting clouds of vapor. As it passed near one of the stone warriors, a faint ripple of mana pulsed under its surface. Subtle. Barely visible through grime and moss.

But Ludger saw everything. Another golem, opposite side, responded half a heartbeat later, like linked minds passing a whisper.

Then a trio of guild apprentices jogged across the plaza arguing loudly, boots slapping cobblestone. When they stepped within about one hundred meters, the nearest sentinel’s mana signature fluttered again, tiny sparks beneath cracked stone.

And when they stepped beyond that distance, the runes dimmed to near zero.

There. One hundred meters of detection radius.

A perfect circle if all were placed evenly, which they were. In fact, he counted them again. Twelve visible around the perimeter when viewed from different roof angles. Enough to overlap detection fields tightly.

No blind spots. No casual approach. No footsteps without alert.

If Ludger walked inside normally, even invisible, his mana would brush against stone runes like a thumb brushing harp strings, and every sentinel would “hear” him enter.

If he used Seismic Sense, mana would radiate outward and strike all of them at once. An immediate alarm. He leaned forward, mind running.

Below? The sphere of detection likely extended underground. Maybe twenty, maybe thirty meters. Digging a tunnel that deep would work… but cost mana and time, both risky.

Above? A direct rooftop descent. Possibly through a skylight, attic, or balcony. Air approach might avoid ground detection. But…

Guild quarters this wealthy almost certainly had aerial wards, anti-teleport counters, or barrier plates tuned for vertical intrusion. The same old city architects that built labyrinth access points loved redundancy.

Still, air was the best route, as long as he found…

A weak spot. A blind angle. Something overlooked.

He watched longer. A courier passed. No reaction. A patrol captain approached within seventy meters, golems flared again. Ludger tested a theory and tossed a pebble downwind using minimal mana.

The instant it hit ground inside the radius, three sentinels flickered.

Not sound-based, he noted. Mana presence or vibration-based. Maybe both.

This wasn’t simple security. It was smart. Designed by someone paranoid. Which meant there was something to hide.

He felt excitement coil beneath his ribs, the cold, sharp anticipation of a hunter finding the edge of a trail. His new runic armor muffled his presence well, but these sentinels weren’t looking for intruders like casual thieves.

They were built to catch delvers. Assassins. People like him.

Ludger exhaled slowly. He could break one sentinel, quietly. He could disrupt runes with Wordweaver. He could even lock mana inside a shell of earth around its core and suffocate it.

But one golem shutting down might alert the others. He needed to enter the quarter without them noticing his existence.

So he continued to scan rooftops, searching for a building that touched the guild quarter’s inner ring, where sentinel lines overlapped tightly but roof tiles dipped just low enough to slip between detection cones.

A single blind wedge. If it existed, he’d find it. 

Ludger stayed still for a long time. Two hours passed, perhaps more, perception blurred in cold rooftop stillness. The city below changed. Voices faded as taverns closed and drunks staggered home. Lamps dimmed. Patrol routes slowed. Carts ceased rolling. The world held its breath.

The temperature sank. Mist thickened, a creeping blanket rising from sewer vents and river channels, filling alleys and curling around rooftops like ghost fingers. The sky overhead darkened further, bloated with heavy clouds, but no rain came. Just silence and damp air.

Ludger extended his hand, palm facing mist. He wrote a rune under his breath, not a full chant, just a Wordweaver spark shaped with intent. A single glowing character wrote itself into the air like light dancing through fog:

「Mist」

He flicked his wrist and sent it drifting into the city haze like a floating ember. It sank into the fog, pulsed once, then dissolved.

A beat later, mist thickened unnaturally. Not a storm, but a smothering veil. Lamplight blurred to white halos. Rooftops turned to silhouettes. Streets disappeared under rolling gray sheets. It was subtle enough not to trigger runic alarms, but dense enough to swallow sight.

And Ludger slipped into it like an eel into dark water.

He activated Mist Shroud, mana blending into vapor. His presence didn’t vanish, it merged. Instead of repelling detection, he became noise inside noise, humidity inside mist, one more water particle among millions.

Ninety meters away, a sentinel should’ve marked him. It didn’t move. No change. No runic flicker. No alert. Good.

He drifted through fog-shrouded rooftops, barely more than a shadow among other shadows. Step. Pause. Listen. Observe. Every movement slow, controlled. He wasn’t rushing into enemy territory, he was inserting a virus into a fortress.

Through mist, he tracked golem silhouettes, features softened to mossy statues. Their glow dimmed, stance unchanged. But the mist triggered minor behavioral shift, with visibility reduced, they closed formation, drawing nearer to the central guild blocks.

Four moved inward. Two rotated. Gap formed, small, but real.

He memorized every position, mapping detection radii in his head.

70 meters overlap here.

60-meter blind patch behind the east workshop.

A chimney stacks shadow splits detection cones.

A single viable entry point emerged, narrow as a needle. Only possible at rooftop height, through a small ventilation shaft that dropped behind guild hall #3.

Wind shifted and mist roiled thicker. Perfect cover for the next step.

Ludger crouched low, mist swirling around him like a living cloak. He could see faint shimmers of runes on his own armor, layered protections pulsing quietly with his heartbeat.

Before moving further, Ludger tested something.

He extended his palm, condensed mana to the skin surface, and wrote a short rune-string with Wordweaver, letters hanging neon-blue in the mist like a ghost signature:

「10s • Countdown • Electric Shock」

The glyph pulsed once.

Then again.

Then like a rhythm — tick… tick… tick… — dimming brightness each second as mana wound tighter and tighter around the rune, compressing into a bead the size of a grain of rice.

When it hit zero, pain whipped across his palm, a flash of electric mana snapping directly into nerves.

Ludger winced.

Even controlled, it stung deep, enough to tighten fingers and bite the inside of his cheek. His INT and mana sensitivity amplified sensation like raw wire against skin.

He flexed his hand, feeling residual pins and needles crawl across tendons. Good. Perfect, even.

Because now he knew the precise threshold of pain vs. mana output vs. rune stability.

And more importantly, how loud an electric pulse felt in mana terms.

He had watched the golems for hours. Watched who they reacted to. Measured the amount of mana density caused by footsteps, spells, breathing a little too thickly.

The line between reaction and no reaction was razor-thin.

He now knew exactly where that line was.

Ludger inhaled mist, exhaled calculation.

Then, with two fingers, he drew runes in the air. Runes so fine they were almost gossamer threads instead of glowing letters. Words floated silently like faint ink strokes cut from light:

「Short Circuit • Delay 46s」

「Short Circuit • Delay 48s」

「Short Circuit • Delay 51s」

「Short Circuit • Delay 53s」

Each aimed at a golem, spaced to account for distance, visual angle, patrol timing. Countdowns staggered. Because if they all broke at once, someone would notice the synchronized failure. But if they flickered and glitched like old constructs wearing out?

Guards might chalk it up to age. Patrols might assume wear and tear.  Sentinels might enter maintenance mode, lowering perception temporarily.

Ludger’s handwriting shimmered, silent snowfall of glowing script.

Then he tapped each rune with a thread of mana, just enough for flight.

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