The transition was complete, but the cost was etched into every line of Mike’s face. He remained on his knees for several minutes, fingers tracing the hard, textured ridges of the chitin that had erupted from his forearms. It felt entirely alien, a parasitic growth that had become permanent, yet there was an undeniable sense of security in the new weight of his limbs. He could feel the strength of the centipedes now residing within his own cellular structure, a biological theft that made him feel more like a monster than a man.

  "The evolution of your physical form is successful," Valerius noted.

  The entity’s holographic form flickered in the corner of Mike’s eye, suffering from a strange static distortion that made his silver robes look as though they were dissolving into digital rain. The voice was losing some of its usual imperious edge, sounding strained and distant, as if broadcasting from the far side of a mountain range.

  "My own internal systems are flagging," the entity confessed, his image glitching. "My database has been heavily damaged by the recent glitches and the lack of a proper interface. Large sectors of my memory are currently inaccessible due to a lack of refined energy. Biomass is sufficient for your biological needs, Michael, but it cannot fix the degradation of my core logic. I need a concentrated power source."

  Mike wiped yellow ichor from his mouth with the back of his hand, tasting the bitterness of the insect. He looked at the flickering image of the entity and then down at the fresh, grey armor covering his limbs. The hunger in his chest had been silenced for the moment, replaced by a cold, analytical clarity that he suspected was another gift from the System.

  "And if you do not get this power source," Mike asked, "what happens then?"

  "Then the knowledge you need to truly dismantle Rigg remains locked away," Valerius replied. The static in his voice buzzed louder now, like a swarm of angry hornets. "You are becoming strong, but you are still little more than a child swinging a stick in the dark. You need the history of the Higher System if you hope to survive a direct confrontation with a man like Rigg. Without my archives, you are flying blind into a storm you cannot possibly understand."

  Valerius turned his flickering, translucent gaze toward Grim. The rat was busy cleaning his paws with his tongue, seemingly unbothered by the recent violence, but his black eyes remained sharp, watching the dark path ahead. A thin, blue beam of light swept out from the entity’s hand, scanning the rat’s body with a rhythmic, pulsing light.

  "This is most interesting," Valerius murmured.

  "What is it?" Mike asked, pushing himself to his feet. The new armor added a strange, heavy weight to his limbs, but it felt right. It felt safe, like a shield he had finally earned from the dirt.

  "Subject Grim possesses a dormant mutation gene of the Warlord class," Valerius said, tilting his head. "It is a rare occurrence in this sector. He is not just a companion or a simple pet, Michael. He is an Apex variant in waiting. Given enough biomass and the correct biological catalyst, he will not just follow your commands. He will begin to issue his own commands to the lesser vermin of the Heap. He will become a general of the swarm."

  The story has been illicitly taken; should you find it on Amazon, report the infringement.

  Mike looked down at Grim. The rat chuffed softly and stepped forward to nudge Mike’s hand with his cold, wet nose. To the rest of the world, Grim was a monster and a carrier of disease. But here in the dark, covered in the blood of their enemies, he was the only thing in Mike's life that made sense. He reached down and scratched the rat behind his scarred ears, feeling the powerful muscles beneath the fur.

  I didn't realize he had that kind of potential, Mike thought.

  "The potential of the pack is limited only by the quality of the leadership," Valerius lectured, the static momentarily clearing. "You are no longer just a Sifter, Michael. You are becoming a Sovereign of the Rot. But a Sovereign without a throne is just a target. We must secure the power source located in the lower vaults. It is a concentrated fuel cell, abandoned during the initial collapse of the sector. It contains enough refined energy to stabilize my systems and unlock the next tier of your evolution."

  Mike nodded, a grim resolve settling over him. He looked down the length of the service tunnel, where the darkness seemed to stretch on forever. He could feel the Weaver and the Spitter waiting for his signal, their simple minds focused entirely on his will. They were a part of him now, a living extension of his desire to survive.

  "How far is the vault?" Mike asked.

  "Three miles through the sub-levels," Valerius replied. "The path is occupied by a variety of territorial predators that have made their homes in the heat of the lower pipes. You will need to utilize every doctrine I have taught you. There is no room for error."

  Mike looked at the grey plates on his arms, then at the massive rat standing by his side. They had started with nothing but a cough and a handful of scrap metal, and now they were carving a path through the belly of the world.

  "Let us go then," Mike said, his voice echoing with new strength. "We have a power source to find."

  They moved forward into the darkness, a small and lethal pack cutting through the shadows. Mike navigated the narrow passages with a new confidence, senses heightened by the chemicals flooding his system. He heard the drip of water from a pipe fifty feet away, the scuttle of a beetle in the rafters above. The tactical overlay continued to guide him, highlighting safe paths and advantageous positions.

  As they descended deeper into the sub-levels, the temperature began to rise. The air became thick with the scent of grease and ancient machinery. Mike felt the vibration of heavy equipment somewhere far below, a rhythmic thrumming that felt like the heartbeat of the sector. They were leaving the familiar ruins of the surface behind and entering the true heart of the Heap.

  "Keep your eyes open," Valerius warned. "The shadows here are deeper than you know."

  Mike didn't need the warning. He could already feel the eyes of the darkness watching them. But for the first time in his life, he wasn't afraid. He had his pack, he had his armor, and he had a purpose greater than his next meal.

  He moved with a heavy, rhythmic stride, the clack of his armored boots against the stone sounding like a countdown. Behind him, the Spitter and the Weaver followed in perfect silence, while Grim led the way with the confidence of a general. They were no longer running from the world. They were coming to claim it.