The Greater Sewer Lurker was a masterpiece of biological horror. Its flesh was the color of a drowned man's skin, translucent enough to see the sluggish, glowing bile pumping through its veins. It didn't just walk; it flowed, its dozens of vestigial limbs clattering against the damp stone like a thousand skittering insects. The single, pulsating green eye in the center of its mass fixed on Ren with a primitive, unadulterated hunger.
"Ren, look out!" Lia screamed, pressing her back against the moss-covered wall.
The Lurker didn't roar this time. It struck. A thick, muscular tentacle, covered in hooked barbs that dripped with paralytic venom, lashed out with the speed of a whip.
Ren didn't blink. He felt the cold calculation of the System sharpening his reflexes. To him, the tentacle didn't move fast; it moved in a trajectory that the Void already understood. He stepped to the left, the barbs missing his ear by a fraction of an inch, and grabbed the limb with his bare hand.
[Skill Activated: Devourer's Touch]
The moment his skin touched the creature, the Void Orb in his palm flared. The Lurker let out a wet, gurgling shriek as its very life force was ripped from its body. The pale flesh of the tentacle turned grey, then shriveled like a sun-dried fruit.
[Absorbing Essence: High-Grade Bio-Mana]
[Void Points +12]
"You're not the only one who's hungry," Ren hissed.
The creature, sensing a predator far more dangerous than itself, panicked. It reared back, its central maw opening to reveal a spinning vortex of teeth. It sprayed a jet of caustic acid, a green slime that hissed as it ate into the stone floor.
Ren raised his hand. "Event Horizon."
The acid never reached him. It hit the invisible gravitational wall and was compressed, swirling around the black marble in Ren's hand until it was nothing more than a dense, harmless bead of liquid. Ren then flicked his wrist, sending the compressed acid back at the creature's eye with the force of a bullet.
The Lurker's eye exploded in a spray of green ichor. It thrashed wildly, its massive body slamming into the walls of the tunnel, causing chunks of masonry to rain down from the ceiling.
"Lia, get back!" Ren shouted. He could feel the Void in his chest demanding more. The temporary boost he had gained from Captain Magnus was fading, and his mana pool was dangerously low. He needed to finish this, and he needed the "Experience."
He summoned the Void Blade. The dark energy extended from his hand like a jagged shard of obsidian, three feet long and vibrating with a low, humming frequency that made the very air feel heavy.
He lunged.
He didn't aim for the limbs. He dove straight into the creature's open maw.
Lia let out a strangled cry, her hands over her mouth. "Ren!"
Inside the beast, Ren was surrounded by the stench of rot and the crushing pressure of its throat muscles. But he wasn't suffocating. He was feeding. He plunged the Void Blade into the creature's primary mana-core—a glowing, pulsating sac of energy located just behind its brain.
[CRITICAL HIT!]
[Siphoning Core Energy...]
Ren felt a massive surge of power. It was raw, wild, and tasted like stagnant water and ancient earth. His veins felt like they were being filled with liquid lead. His vision turned entirely black, save for the bright, glowing lines of the System's notifications.
[Level Up! 11 -> 13]
[Level Up! 13 -> 15]
[Void Points: 280]
[New Passive Unlocked: Void Senses (Phase 1)]
The Lurker's body went limp. The sound of its thrashing stopped, replaced by the wet thud of its massive corpse collapsing into the sewer sludge. Ren crawled out of the creature's throat, covered in green slime but radiating a terrifying aura of power.
He stood up, his breathing heavy. The swirling nebulae in his eyes were brighter now, casting a faint, ghostly light on the tunnel walls.
Lia approached him tentatively. She didn't hug him. She didn't even touch him. She just looked at him with a mixture of relief and profound sadness. "You... you just ate it from the inside."
"I did what I had to," Ren said, his voice regaining some of its human texture. He looked at his hands; they were no longer trembling. "The System... it tells me we're not alone. The guards are above, but there's something else down here. Something older."
[System Notification: Void Senses Active.]
[Detecting: 3 High-Energy Signatures 200 meters ahead.]
[Type: Ancient Construct.]
"The Undercity isn't just a ruin, Lia," Ren said, looking down the dark passage where the Lurker had emerged. "It's a graveyard. And I think the Empire has been using it as a pantry."
"A pantry?" Lia frowned.
"They don't just get their mana from the Sun-Forge Stone," Ren explained, the realization hitting him as he processed the memories the Void had 'tasted' from the Lurker's mana. "The Stone is a filter. It takes the life force from things down here—monsters, ancient relics, maybe even people—and turns it into the 'Holy Light' everyone worships."
Lia's face went pale. "That... that would mean the entire Empire is built on a lie. The Sun-Priests, the Emperor... they're just glorified parasites."
"Exactly," Ren said. He felt a grim satisfaction. If the Empire was a parasite, then he was the cure. Or perhaps, he was the bigger parasite.
Suddenly, a rhythmic, mechanical clanking echoed from the darkness ahead. It wasn't the sound of boots. It was the sound of metal grinding on metal, accompanied by the hiss of steam.
From the shadows, three massive figures emerged. They were ten feet tall, built of rusted brass and glowing blue crystals. Their heads were simple domes with a single, glowing red slit for an eye. In their hands, they held massive hammers that crackled with a strange, pale electricity.
[Warning: Imperial Sentinel Golems (Level 45)]
[Protocol: Exterminate all unauthorized lifeforms.]
"Ren, those are Ancient-Rank constructs!" Lia hissed, drawing her dagger. "Not even a Master-Knight can take three of them at once!"
Ren looked at the Golems. He looked at the blue crystals embedded in their chests—the very same crystals Malachi had given him to feed his hunger.
"They're not enemies," Ren said, a dark, predatory smile spreading across his face. "They're batteries."
He turned to the System. "Spend 200 Void Points. I need the Gravitic Well upgrade. Now."
[Transaction Confirmed.]
[Skill Evolved: Gravitic Well -> Singularity Point.]
[Effect: Create a localized collapse that pulls all objects and energy toward a single point. Cost: 100 MP.]
The Golems raised their hammers in unison, the steam from their joints hissing like angry vipers. The floor began to shake under their massive weight.
"Lia, hold onto something," Ren warned.
He didn't wait for them to strike. He raised both hands, his palms facing each other. Between them, a speck of darkness appeared—so small it was almost invisible, but so heavy that the very light in the tunnel began to curve toward it.
"Singularity Point!"
The world screamed.
The Golems, each weighing several tons, were lifted off their feet. They didn't just fall toward Ren; they were sucked toward the tiny black speck between his hands. Their brass plating groaned and buckled, the blue crystals in their chests flickering wildly as their mana was forcibly drained into the void.
"Impossible..." Lia whispered, shielding her eyes from the sparks and the distorted air.
The three Golems were crushed together into a ball of scrap metal no larger than a horse. The sound of their destruction was a deafening screech of tortured metal. Then, with a final pop, the singularity vanished, leaving only a pile of crushed brass and three shattered, grey crystals on the floor.
Ren slumped forward, his mana completely depleted. He felt a hollow, aching exhaustion, but his level was climbing again.
[Level Up! 15 -> 18]
[Void Points: 130]
"We're getting close," Ren panted, looking at the door the Golems had been guarding. It wasn't made of wood or iron. It was made of pure, translucent crystal, and behind it, a soft, golden light pulsed.
"What is that?" Lia asked, her voice filled with wonder.
"That," Ren said, standing up and wiping the sweat from his brow, "is the source. The reason my father was killed."
He walked toward the door, but before he could touch it, the System issued a final, chilling warning.
[WARNING: Boss Entity Detected behind the door.]
[Name: The Sun-Forge Avatar.]
[Threat Level: FATAL.]