The basement level of the Sunken Mall was a grave.
The water was waist-deep, a thick, oily sludge that smelled of diesel and dead fish. Ren moved slowly, the silence broken only by the rhythmic drip... drip... drip of condensation falling from the exposed pipes.
"Ren," Gluttony's voice was uncharacteristically tight. "Stop."
"I see a chest," Ren whispered, pointing to a mound of debris in the center of the flooded atrium. "There's something glowing on top of it."
"Ignore the shiny object. Turn around. Slowly."
Ren paused. [Constitution: 11] allowed him to feel the vibration in the water before he heard the sound. Something massive was displacing the sludge.
The water ten feet to his left exploded.
It wasn't a splash; it was an eruption. A wall of muscle and scales the size of a minivan breached the surface.
Ren reacted on pure instinct.
[Flash Step]
ZHOOM.
He vanished, reappearing on top of a rusted HVAC unit five meters away.
Where he had been standing a microsecond ago, massive jaws slammed shut with the force of a hydraulic press. CLANG. The teeth caught a steel support pillar and sheared it in half like a twig.
Ren stared, his blood turning to ice.
It was an alligator, but twisted by the dungeon's corruption. It was thirty feet long. Its scales weren't just skin; they were encrusted with rusted car doors, rebar, and street signs, fused to its body over years of dwelling in the scrap. Its eyes burned with a radioactive green light.
[Boss Detected: Titan-Scale Crocodile]
[Rank: D (Mutant)]
[Warning: Armor Rating exceeds user's damage output by 400%.]
"That's not a lizard," Ren hissed. "That's a tank."
"Run," Gluttony commanded. "You cannot eat this. It will eat you."
But Ren, high on the victory against the wolves and the mannequin, hesitated. "It's big, but it's slow. If I can get to the soft spot behind the neck..."
He extended his bone claws. He leaped.
It was a mistake.
The Crocodile didn't even turn around. It just whipped its tail.
The motion was a blur. The massive tail, studded with rusted spikes, slammed into Ren in mid-air.
CRACK.
The sound of his ribs breaking was louder than the splash.
Ren was launched across the room. He smashed through a glass storefront, tumbling through a display of rotted clothes, and slammed into a concrete wall.
[HP: 45 / 130]
[Critical Injury: Rib Fractures (x3). Internal Bleeding.]
Ren gasped, spitting a mouthful of blood. He tried to stand, but his legs wobbled. The pain was blinding.
"Okay," Ren wheezed. "Running is good."
The Crocodile was coming. It crawled out of the water, its claws gouging the concrete. It wasn't rushing. It was stalking.
Ren scrambled backward, crawling over the broken glass. He looked for an exit, but the creature was blocking the way back to the escalator.
He was trapped in the loading bay.
"The vent!" Gluttony screamed. "Above the loading dock!"
Ren looked up. Twenty feet up. He couldn't jump that high with broken ribs.
The Crocodile hissed, a sound like a leaking steam valve. It opened its jaws.
Ren looked around frantically. His eyes landed on the "mound" the creature had been guarding. It wasn't just debris. It was a nest.
And sitting in the center of the nest, pulsing with a deep, violet light, was a canister. It looked like military-grade hazardous waste, cracked open and leaking a thick, glowing fluid.
The Crocodile wasn't just living here. It was feeding on that.
[Item Detected: Mutagen Source - Class B]
[Analysis: Highly volatile evolutionary catalyst.]
An insane idea formed in Ren's mind.
"If I can't kill it," Ren panted, "I'm at least taking its dessert."
He stood up, swaying. He picked up a metal mannequin stand.
"Hey! Ugly!"
Ren threw the metal pole. It clattered uselessly against the creature's armored snout.
The Crocodile roared and charged.
Ren waited. He waited until he could smell the rot on its breath. He waited until the jaws opened to snap him in half.
[Flash Step]
He didn't teleport away. He teleported past the monster, directly into the nest.
He landed in the mud. He grabbed the leaking canister. It burned his hand, the violet fluid sizzling against his skin.
[Warning: Toxic energy detected.]
The Crocodile realized it had been tricked. It tried to turn, its claws scrabbling on the slick floor, but its massive size worked against it. It crashed into the wall Ren had just left, bringing down a shower of concrete.
Ren didn't wait to see the damage. He shoved the burning canister into his pouch.
He saw a service ladder leading up to a catwalk.
He sprinted. Every step was agony. His ribs ground together.
The Crocodile freed itself. It whipped around and lunged at the ladder.
Ren scrambled up. He felt the wind of the jaws snapping shut inches below his boots. The creature's snout smashed into the ladder, bending the metal.
Ren lost his footing. He hung by one hand, dangling over the open maw.
He looked down. He looked directly into the radioactive green eyes of the Titan.
"Not today," Ren gritted out.
He swung himself up, hauling his broken body onto the catwalk.
The Crocodile roared below him, thrashing, trying to climb the wall, but it was too heavy. It snapped its jaws, furious, watching its prize—and its thief—get away.
Ren didn't stop. He limped along the catwalk, blood dripping from his mouth, clutching his side. He reached the emergency exit door. He shoved it open and stumbled into the stairwell.
Only when the heavy steel door slammed shut, muffling the roars of the beast, did Ren collapse.
He slid down the wall, clutching his chest. He was shaking.
[HP: 38 / 130]
[Status: Surviving.]
"That," Gluttony whispered, "was incredibly stupid. And surprisingly entertaining."
Ren reached into his pouch. He pulled out the canister. It was small, made of reinforced glass, filled with a swirling purple liquid that seemed to move on its own.
[Item: Abyssal Mutagen (Sample)]
[Description: Pure concentrated corruption. Ingestion will trigger a forced, chaotic evolution.]
[Requirement: Body Condition 100%. Current Condition: Critical.]
Ren stared at the glowing liquid.
"I couldn't scratch it," Ren whispered. "My claws... they bounced off like plastic."
"You are a hatchling, Ren. That was an elder. Do not be ashamed of running. The mouse does not fight the hawk."
Ren clenched his fist around the canister. His eyes hardened.
"I'm keeping this," Ren said. "I'm going to heal. I'm going to evolve. And then..."
He looked back at the door.
"...I'm coming back to turn that lizard into a pair of boots."
Ren stood up, using the railing for support. He began the slow, painful climb to the surface. He was leaving the dungeon with broken ribs and no boss kill.
But he was leaving with the key to his next form.