The transmutation of the Geometric Hounds had provided Aris with exactly 1,422 pounds of raw, inert marble aggregate and 318 pounds of crystallized, high-alkaline glass.
In the sterile vacuum of Aris's eternal wakefulness, these were not the remains of monsters; they were the first shipment of a supply chain. He stood at the center of his black-stone circle, his spherical perception locked onto the piles of debris Elia was dragging toward the perimeter.
The Echo's movements were rhythmic and pained. Her ashen skin scraped against the floor, leaving trails of silver dust that Aris's sanctuary immediately stabilized. She was a biological machine approaching a state of critical wear. Her "fuel"—the lingering memories of her previous life—was being consumed by the sheer physical effort of labor.
"Efficiency is dropping," Aris observed. His synthesized voice vibrated through the silver lattice of his chest. "At interval 1,200, your movement speed has decelerated by 14.3 percent. Internal oxidation is increasing."
Elia paused, leaning a heavy shard of marble against her porous knee. She wiped a smudge of silver-gray dust from her brow. "The weight... it is different here, Sovereign. The stone doesn't want to be moved. It feels like it is trying to root itself back into the floor."
"Correct," Aris replied, his purple core pulsing with a cold, steady light. "The Cathedral possesses a high degree of structural memory. It seeks to reintegrate its own matter. To build a wall that the Cathedral cannot reclaim, we must rewrite the stoichiometry of the bonding agent. We do not just stack the stones; we must fuse them at a molecular level."
Aris knelt before the pile of crystallized glass—the remains of the first hound's neutralized throat. He extended a silver-threaded arm, the fractal patterns on his skin glowing as he pulled the ambient, copper-tasting particulate from the air.
He did not possess a furnace. He was the furnace.
He introduced a high-frequency vibration into his silver fingers, touching a shard of the glass. The kinetic energy transformed into localized thermal energy. The glass shrieked, then softened, turning into a glowing, viscous liquid that resembled molten mercury.
Experiment 001: The Mortar of Void.
Aris began to mix. He introduced a measured amount of Elia's "wept" silver dust into the molten glass. The reaction was violent. The silver dust acted as a stabilizer, binding the Cathedral's alkaline glass to Aris's own synthesized energy.
The result was a thick, shimmering sludge that defied the Cathedral's upward-falling rain. It was a substance that possessed "negative weight"—it didn't just sit on the floor; it pushed back against the atmospheric pressure of the void.
"Elia. Position the aggregate."
The Echo moved with sudden, renewed purpose, driven by the absolute authority in Aris's voice. She began to stack the dull gray marble shards along the southern edge of the ten-foot circle. She built with the desperate precision of a prisoner carving a key.
Aris followed behind her. With each stone she placed, he applied a layer of the shimmering, mercury-like mortar. He didn't use a trowel; he wove the mortar with his silver threads, stitching the stones together.
As the first layer of the wall rose, the Cathedral groaned.
It was a structural sound—a deep, tectonic protest. The endless halls surrounding the courtyard seemed to tighten. The shadows in the vaulted ceilings churned, elongating into jagged shapes that watched but did not strike. Aris's constant, 360-degree observation acted as a sensory lock. He was staring the Cathedral into submission.
But as the wall reached the height of Elia's waist, Aris's hyper-focused mind registered a new variable.
Among the shards of the shattered Geometric Hounds, he found something that did not belong. It was a small, calcified object, buried deep within the marble heart of what had been the hound's chest.
He picked it up.
It was a locket. Or rather, the Cathedral's version of one. It was carved from the same bone-white marble as the pillars, but it possessed an intricate, Gothic detail that was almost too fine to see. It wasn't a monster's part; it was a "fossil" of a human memory that the Cathedral had swallowed and repurposed as a kinetic core for its hounds.
Aris held the object. His sensors picked up a faint, residual frequency—a haunting, melodic vibration.
Data point: The Cathedral does not create its guardians from nothing. It uses the "unbecoming" remains of previous explorers as the foundation for its antibodies.
"Sovereign?" Elia whispered, stopping her labor to look at the object in Aris's silver palm. "That... I recognize the pattern on the metal. That belonged to the Captain. The one who led us into the gold-and-purple sky."
"This is no longer your Captain," Aris stated, his voice flat and clinical. "This is a discarded variable. A failed synthesis. Its primary function now is to provide a concentrated source of high-density memories for our mortar."
"You... you would use his soul to glue the rocks?" Elia's voice was a barely audible rasp of clay.
Aris turned his spherical perception toward her. His translucent purple core flared with a cold, blinding intensity. "A chemist does not see a soul, Elia. I see a source of concentrated, stable energy that can prevent the Cathedral from reclaiming these walls while you sleep. To preserve the living, we must utilize the dead."
He did not wait for her consent. He crushed the marble locket in his silver-threaded hand.
The melodic frequency shattered into a scream of silver dust. Aris immediately channeled the energy into his vat of molten glass. The shimmering sludge turned a deep, royal violet, pulsing with the rhythmic "thrum" of the Captain's dying memories.
He applied the new, soul-infused mortar to the next layer of stones.
The effect was instantaneous. As the violet mortar touched the inert marble, the wall didn't just solidify; it anchored. The black stone floor beneath them surged upward, merging with the wall. The two materials fused into a single, seamless rampart of black, silver-veined obsidian.
The sanctuary was no longer just a circle on the floor. It was becoming a room. A laboratory.
But as the first wall stood complete, Aris felt the first "blur" in his data.
Even with his traded rest, his mind was a processor running at 100 percent for too long. The Captain's memories, now bonded to the very walls of his sanctuary, began to bleed into Aris's hyper-focused perception. He didn't see visions, but he felt the ghost of a feeling—a sudden, irrational surge of duty. A phantom weight of a cape he didn't wear.
He logged the anomaly. Contamination of the subject's logical baseline by external mnemonic artifacts.
He looked at the wall. It was beautiful. It was Mushoku-Gothic in its ornate, dark complexity—a black obsidian barrier shot through with glowing silver veins and pulsing with the purple light of a dead man's honor.
It was the first piece of his kingdom. And it was made of the very thing he was losing: a human history.
"The first wall is set," Aris declared, his synthesized voice echoing off the black stone. "At this rate of synthesis, we will have a fully enclosed laboratory by Volume 1, Chapter 10."
Elia sank to her knees against the new wall, her ashen body drawing warmth from the pulsing violet mortar. She looked at Aris, her white-stone eyes filled with a terrifying, religious awe.
"You are building a grave for the world, Sovereign," she whispered.
"No," Aris replied, his unblinking gaze returning to the endless, hostile hallways of the Cathedral. "I am building a crucible. And in a crucible, everything eventually changes its state."
The Unbecoming was no longer just a personal tragedy. It was now an architectural fact.