The Stitched Guardian did not roar. It didn't possess the vocal cords for it. Instead, the rusted iron gurney frame fused to its right arm scraped against the linoleum with a deafening screech as it charged.
For a creature dragging nearly three hundred kilograms of dead flesh and medical steel, it moved with terrifying acceleration.
Elias didn't retreat. His mind, overclocked by a base Intelligence stat of 20, processed the incoming threat not as a monster, but as a dynamic physics problem. The Guardian was a massive object in motion. According to Newton's First Law, it would remain in motion until acted upon by an unbalanced force.
Elias, weighing barely eighty kilograms, was not that force. If he tried to block the iron slab directly, his bones would shatter instantly.
The Guardian swung its makeshift iron club in a brutal, horizontal sweep aimed at Elias's torso.
Elias dropped his center of gravity, sliding forward and underneath the arc of the swing. The heavy iron passed inches above his head, the displaced air ruffling his dark hair. The creature's massive momentum carried it forward, leaving its left flank exposed for a fraction of a second.
Elias planted his lead foot and thrust the Scholar's Kinetic Hammer upward. He didn't swing it like a bat; he used it like a spear, driving the heavy oxygen tank and its attached scalpels directly into the Guardian's ribcage.
Physics dictated the result. By concentrating the immense mass of the swinging oxygen tank onto the microscopic surface area of the scalpel blades, Elias maximized the pressure of the strike.
P=AF
The blades punched through the creature's thick, leathery skin, and the blunt force of the aluminum tank followed immediately after, shattering three ribs.
[Critical Hit! Bleed effect applied.]
The Guardian staggered, dark blood spraying from the wound, but it didn't fall. Its lack of a central nervous system meant it didn't feel pain the way a living organism would. It simply registered the damage and retaliated.
Before Elias could retract his polearm, the Guardian snapped its left hand out—a massive, bloated fist—and backhanded him across the chest.
Elias couldn't dodge in time. He threw his arms up in a cross-guard, bracing the steel pole against his forearms to absorb the blow.
The impact was like being hit by a compact car. Elias was launched backward, his nursing shoes skidding violently across the floor. He slammed into the heavy wooden counter of the nurses' station, splintering the mahogany trim.
Pain flared in his arms and chest, threatening to collapse his lungs. But at the exact moment of impact, a warm, azure light pulsed through his veins.
[Kinetic Conversion Activated.] [Absorbing 10% of kinetic impact. Mana +15]
Elias hit the ground hard, gasping for air, but his bones were intact. The system skill had acted as an invisible shock absorber, literally bleeding the destructive kinetic energy out of the strike and converting it into pure, usable mana.
He checked his peripheral vision. Mana: 35/20 [Overcharge]
"Elias!" Clara screamed from the medication room doorway.
"Stay back!" Elias coughed, forcing himself to his feet. The Stitched Guardian was already turning around, raising the iron gurney frame high above its head for an executioner's strike.
Elias realized brute force wouldn't win this. The Guardian had too much mass, too much health. He needed to alter the environment. He needed to manipulate the variables of the equation.
"Clara!" Elias shouted, his eyes locked on the Guardian. "The 90% isopropyl alcohol! Throw it on the floor! Now!"
Clara didn't freeze. Terrified as she was, the authoritative bark of the Pflegeassistent triggered her clinical training. She reached into her medical bag, pulled out a large, one-liter plastic bottle of concentrated surgical rubbing alcohol, and hurled it down the corridor.
The bottle hit the linoleum between Elias and the charging Guardian, bouncing once.
Elias didn't wait. He swung his poleaxe, smashing the heavy base of the tank into the plastic bottle. It exploded, coating a three-meter stretch of the polished hospital floor in a slick, highly viscous layer of pure alcohol.
The Guardian stepped onto the puddle.
Friction is the force resisting the relative motion of solid surfaces. The polished linoleum already had a relatively low coefficient of kinetic friction (μk), but the introduction of the surgical liquid dropped it to near zero.
The Guardian, carrying hundreds of kilograms of forward momentum, lost all traction.
Its heavy legs slipped out from underneath it. The creature let out a garbled, wet shriek as its center of mass completely collapsed. Its own massive inertia betrayed it, transforming it into an uncontrollable projectile. The Guardian crashed onto the floor, sliding violently toward Elias on its stomach.
Elias didn't back away. He stepped to the side, letting the heavy iron arm slide past him. As the Guardian's head slid into range, Elias raised the Scholar's Kinetic Hammer high into the air.
He had gravity. He had leverage. He had maximum potential energy.
Ek=21mv2
Elias channeled his overcharged mana into his muscles, artificially increasing his physical Strength stat for a single second. He brought the heavy oxygen tank down like a meteor, aiming specifically for the C1-C2 cervical vertebrae—the axis joint at the base of the skull.
The impact was cataclysmic. The heavy aluminum tank, driven by mathematically perfect leverage and system-enhanced strength, crushed the vertebrae into powder. The surgical scalpels severed the spinal cord completely.
The floor tiles beneath the Guardian's head shattered under the transferred force.
The massive creature spasmed once, its rusted iron arm twitching, before all movement ceased. The crimson glow in its single eye faded to a dull, lifeless gray.
Silence fell over the fourth floor, broken only by the heavy, ragged breathing of the twenty-year-old nursing assistant standing over the corpse.
[Mini-Boss Defeated: Stitched Guardian] [Experience Gained. Massive Contribution Detected.] [Level Up: 3 -> 4] [Level Up: 4 -> 5]
A golden light washed over Elias, erasing the bruises on his forearms and the burning ache in his lungs. Leveling up didn't just grant numbers; it was a total biological reset.
[Attribute Points Unallocated: 4]
Above the ruined corpse of the Guardian, the air shimmered. Unlike the Scavengers, the Mini-Boss had dropped something. A small, geometric crystal the color of dried blood hovered in the air, rotating slowly. Next to it lay a heavy, metallic ring that looked suspiciously like a surgical clamp.
Clara slowly stepped out of the medication room, her eyes wide, staring at the carnage. The hallway looked like a bomb had gone off. Medical carts were overturned, blood painted the walls, and the massive, horrifying Guardian lay dead at the feet of her junior coworker.
"You... you killed it," Clara whispered, her voice trembling with a mix of awe and absolute horror. "With a floor slip and a tank."
"Sir Isaac Newton killed it," Elias said calmly, reaching out to pluck the floating crystal from the air. "I just helped with the math."
He opened his status screen to inspect the loot. The first phase of the tutorial was over, but the descent to the ground floor had only just begun.