In the next morning

  The air on the 10th Floor of the Dungeon was thick with a fine, misty fog that smelled of wet slate and ancient decay. To a normal adventurer, this was the "Mist Barrier," a psychological hazard that preceded the dangerous drop into the Middle Floors. To Nyt, it was merely an aerosolized suspension of water particles and high-density mana.

  "Minerva, recalibrate visual sensors. Shift to infrared-ultraviolet spectrum overlay," Nyt commanded.

  “Recalibrating... Atmospheric interference bypassed. Administrator, I am detecting a sudden increase in seismic vibrations from the floor below. The transition to the 11th Floor is approaching. Reminder: Our primary objective is the acquisition of 'Vitreous Cobalt' and 'Phase-Steel' ore.”

  "Understood," Nyt replied. He checked the seal on his lab coat. His hands were steady, the result of the grueling physical training with Tsubaki. He felt lighter, his muscles responding to his thoughts with a precision that was finally approaching 1:1 synchronization.

  He was currently traversing the final stretch of the Upper Floors, heading toward the Great Falls. The path was narrow, carved into the side of a shimmering blue cavern.

  Suddenly, a series of frantic footsteps echoed from around a jagged limestone pillar.

  "Minerva, analysis."

  [Target Identified: Bell Cranel. Distance: 15 meters. Status: Elevated heart rate, 145 BPM. He is being pursued by a swarm of 'Hard Armored' Beetles, a floor-jump anomaly.]

  Nyt stepped out from the shadows just as Bell came skidding around the corner. The white-haired boy looked exhausted, his Hestia Knife clutched in a white-knuckled grip. Behind him, three massive beetles each the size of a shield and covered in a carapace that looked like hammered copper—clattered across the stone, their mandibles snapping.

  "Nyt-san?!" Bell gasped, nearly tripping over his own feet in surprise. "Run! These things... my knife can't even scratch them!"

  Nyt didn't run. He didn't even draw his dagger. He simply stepped into Bell’s path, his eyes glowing with a cold, calculating blue light behind his monocle.

  "You're attacking the thickest part of their part, Bell," Nyt said, his voice as calm as a lecture hall. "Even a divine blade requires a point of least resistance."

  "But!"

  "Stand back," Nyt commanded.

  He held out his right arm. The First Paradigm gauntlet hissed as its cooling vents opened. "Minerva, identify the resonance frequency of copper-alloy carapaces."

  “Frequency identified: 1.2 Megahertz. Target lock achieved.”

  Nyt didn't use a physical projectile. He tapped into the Mechanical Core in his chest, shunting a precise burst of mana into the gauntlet’s emitters.

  "Acoustic Fracture," Nyt whispered.

  A ripple of distorted air shot from the gauntlet. It wasn't an explosion; it was a focused vibration. When it hit the lead beetle, the creature didn't fly back. Instead, its copper-like shell suddenly turned to powder, shattering into a million tiny fragments as if it had been made of glass. The soft, unprotected flesh of the monster was exposed for a fraction of a second before the internal pressure caused it to burst into ash.

  The other two beetles froze, their primitive instincts screaming at them to retreat.

  "Bell," Nyt said, not looking back. "The joint between the thorax and the abdomen. It’s a 0.5-centimeter gap. Strike there with a vertical thrust."

  Bell, eyes wide with awe, didn't hesitate. He trusted Nyt’s logic. He lunged forward, his speed boosted by his unique growth. Slash Thrust. The Hestia Knife slipped into the gap Nyt had pointed out. The beetle screeched and dissolved. The third one tried to flee, but Bell caught it with a swift horizontal sweep to the legs, following Nyt’s advice to aim for the joints.

  When the dust settled, Bell was panting, looking at the three magic stones on the floor.

  "Nyt-san... that was amazing! How did you do that to the shell?"

  "Resonance physics," Nyt replied, already turning back toward the descent to the 11th Floor. "I didn't break the shell; I convinced its molecules to stop holding onto each other."

  "Are you... heading deeper?" Bell asked, his voice full of concern. "The 11th Floor is where the Middle Floors start. Even Level 2 parties take it seriously."

  "I have a specific material requirement that the Upper Floors cannot satisfy," Nyt said. He paused, looking at Bell. The boy was growing, but he was still raw. "You’ve improved your footwork, Bell. But you’re still breathing too shallowly. Oxygenate your blood, or your reactions will lag by 0.2 seconds and in the Middle Floors, that’s the difference between a kill and a tombstone."

  "0.2 seconds... right! I'll remember that!" Bell bowed deeply. "Thank you again, Nyt-san! Be careful!"

  "Efficiency is my protection, Bell," Nyt said, disappearing into the mist of the descending stairs. "Worry about your own."

  As Nyt stepped onto the 11th Floor, the environment changed. The blue-lit caverns of the Upper Floors were replaced by dark, damp tunnels made of a jagged, obsidian-like rock. The air was colder, and the silence was heavy, broken only by the distant sound of dripping water and the skittering of things that were much larger than Goblins.

  "Minerva, activate full combat HUD. I want a 360-degree acoustic map. We are here for the 'Vitreous Cobalt' veins."

  The author's tale has been misappropriated; report any instances of this story on Amazon.

  [Warning: Multiple high-density lifeforms detected. Species: Needle Rabbits and Large Orcs. Suggesting the use of 'Event Horizon' for crowd control.]

  Nyt didn't have to wait long. From the shadows of a large stalactite, four Needle Rabbits vicious creatures with a single, metallic horn launched themselves at him. They were three times faster than the Almiraj of the 7th Floor.

  Nyt’s eyes tracked them with mechanical precision.

  "Event Horizon: Radial Dilation."

  The space around Nyt didn't just expand; it became "thick." To the rabbits, it felt like they had jumped into a pool of molasses. Their momentum was sapped, their bodies suspended in a distorted pocket of space-time.

  Nyt moved with a grace that would have made Tsubaki proud. He didn't use a sword. He used the First Paradigm. The gauntlet shifted into its "Morphic" state, extending a series of vibrating, needle-thin blades from the knuckles.

  Step. Pivot. Strike.

  He moved through the suspended rabbits like a surgeon. Each strike was a surgical excision of their magic stones. Pop. Pop. Pop. Pop. Four rabbits turned to ash before they even hit the ground.

  [Materials Collected: 4 Small Magic Stones. 2 Rabbit Horns (High Purity). Note: The Mechanical Core's efficiency is at 88%.]

  "Not enough," Nyt muttered. "We need the Cobalt."

  He pushed deeper, into a cavern where the walls shimmered with a faint, violet luminescence. This was the 'Blue Forest' region of the 12th Floor. Here, the Vitreous Cobalt grew in clusters, looking like jagged glass flowers.

  "There," Nyt said, walking toward a particularly dense cluster.

  He pulled a specialized sonic-drill from his Void-Gate, an invention he’d built using the data from the Killer Ants. He began to extract the ore, the high-frequency vibrations shaking the Cobalt loose without shattering the delicate crystals.

  [Scanning... Vitreous Cobalt acquisition: 400 grams. This is sufficient for the 'Mobility' module's capacitors. However…]

  Minerva’s voice cut off as a massive shadow fell over Nyt.

  From the ceiling dropped an Infant Dragon. It wasn't a true dragon, but a Floor Boss-tier mutation that occasionally spawned on the 12th Floor. It was fifteen feet long, covered in scales that mirrored the violet glow of the cobalt, and its eyes were pits of molten gold.

  It roared, a sound that shook the very air and sent a wave of physical pressure through the cavern.

  "Minerva! Analysis!" Nyt shouted, bracing himself.

  [Species: Violet Scale Infant Dragon (Mutation). Hazard Level: High. Its scales are naturally resistant to magical interference and physical impact. Suggesting immediate use of the 'Deus Ex' Overclock.]

  "No," Nyt grunted, his eyes narrowing. "I need to test the 'Event Horizon' in high-stress combat. If I can't beat this without a full burn, I'm not ready for the Deep Floors."

  The dragon lunged, its maw opening to reveal rows of glowing, mana-charged teeth. It fired a burst of "Violet Flame" , a concentrated beam of thermal energy.

  "Event Horizon: Vector Redirection!"

  Nyt held out his hand. The space in front of him folded like a piece of paper. The violet flame didn't hit him; it hit the folded space and was "refracted" 180 degrees, soaring back toward the dragon’s own face.

  The monster shrieked as its own fire scorched its eyes. It thrashed, its massive tail swinging in a wide arc that pulverized the stone walls.

  Nyt jumped. "Minerva, calculate the leap!"

  “Calculated. 12-degree angle. 4.5 meters per second. Now!”

  Nyt used a micro-burst of space magic beneath his boots, effectively "jumping" off the air itself. He soared over the dragon’s tail, landing on its broad, scaled back. The monster roared and began to spin, trying to throw him off.

  "Mechanical Core: Stabilization!"

  Nyt’s boots locked onto the dragon’s scales using localized gravity manipulation. He was standing perpendicular to the floor, defying physics as the dragon spun like a hurricane.

  He reached into the Void-Gate and pulled out a heavy, industrial-grade spike made of black Adamantite.

  "Minerva, find the spinal nerve cluster. Where is the weak point of its nervous system?"

  [Target Acquired: 3 centimeters below the third dorsal plate. High-density mana flow detected. Striking this point will cause total motor-function collapse.]

  Nyt didn't use a hammer. He used Event Horizon to "shorten" the distance between the spike and the dragon’s spine to zero.

  CRACK.

  The spike didn't just hit the dragon; it bypassed the scales entirely, appearing inside the monster’s flesh. Nyt then slammed his gauntlet onto the head of the spike.

  "Acoustic Overload: 100% Output!"

  A massive surge of high-frequency vibration poured through the spike and directly into the dragon’s spine. The creature’s eyes rolled back. Its entire body seized up, every muscle firing at once in a chaotic, uncontrolled spasm.

  With a final, earth-shaking thud, the Infant Dragon collapsed. It lay still for a moment before its massive form began to dissolve into a mountain of black ash.

  Nyt stood in the center of the ash pile, his chest heaving. His mana was at 15%, but his heart rate was being perfectly regulated by the Mechanical Core.

  In the center of the ash sat a Magic Stone the size of a basketball, glowing with an intense violet light. Beside it was a rare drop: a Dragon's Heart-Scale.

  [Materials Collected: High-Grade Dragon Stone. Heart-Scale. Vitreous Cobalt (400g). Phase-Steel Ore (200g).]

  “Administrator, the data gathered from this encounter is invaluable. I have successfully mapped the 'Internal Spatial Bypassing' maneuver. We can now integrate this into your combat sub-routines.”

  "Good," Nyt panted. "But we’re done for today. I’ve reached the limit of my current hardware."

  He began the long walk back to the surface. As he passed through the 10th Floor, he saw a group of Level 2 adventurers, a standard party looking at him with baffled expressions. They saw a lone boy in a tattered lab coat, carrying a bag of materials that looked heavy enough to crush a donkey, walking out of the Middle Floors as if he’d just finished a light stroll in the park.

  "Hey, kid!" one of them called out. "You... you were down there alone?"

  Nyt didn't stop. He didn't even look at them. "The variable of 'Parties' is only necessary when one's individual efficiency is insufficient to cover the error margin of the environment. Good afternoon."

  He left them standing in the mist, scratching their heads.

  Nyt arrived at the Hephaestus forge just as the moon was rising. He didn't go to his room. He went straight to his workbench.

  He laid out the Vitreous Cobalt, the Phase-Steel, and the Dragon’s Heart-Scale.

  "Minerva," Nyt whispered, his eyes bright with the fever of creation. "Let's build the 'Second Paradigm'. We’re moving beyond the gauntlet."

  “Initializing 'Hermes-Module' Blueprints. Primary Function: Spatial Folding Propulsion. Secondary Function: Kinetic Energy Recycling. Administrator... this will allow you to match the speed of the Sword Princess.”

  "That’s the goal," Nyt said, picking up his tools. "Ais Wallenstein moves at Mach 0.8. By the time I’m done with this cobalt, I’ll be moving through the 'Zero-Space' between seconds."

  As he struck the first blow on the Phase-Steel, the Mechanical Core in his chest hummed in perfect harmony. He was no longer just a scientist observing a world of magic. He was the one building the bridge between the two.