Yuan stood at the chamber entrance for a full minute before approaching.
He'd already determined through Mana Sense that the room contained one signature aside from the artifact itself, dormant and low, consistent with something in a resting state rather than an active patrol. The minute was for something else. The artifact had a quality that made the approach feel like a decision rather than a movement, like the space between it and him was asking him to be certain before he closed it.
He crossed the chamber.
Up close, the facets were more defined, irregular, natural rather than cut, like a crystal grown under pressure rather than shaped by tools. The surface was dark in the way that deep water was dark, not the absence of light but the presence of something too dense for light to pass through comfortably. It rotated on its impossible axis with a patience that implied it had been doing this for a very long time and expected to continue.
The slow pulse beat once while he was looking at it.
The spatial crack above it widened by a millimeter and returned to a width that was one millimeter larger than it had been before.
He reached out and touched it.
---
The chamber disappeared.
Not darkness, the opposite of darkness, everything at once, a volume of information that had no interest in arriving sequentially. He was aware of his body distantly, crouched on a stone floor in a chamber three levels below an academy main hall, and simultaneously aware of something much larger that contained that body and that chamber and everything above them as a small component of a much more complex structure.
The dungeon.
Not as a location. As a thing, a living system, mana-structured and self-maintaining, built during what his mind translated as the Great Integration with the deliberate architecture of something meant to persist. He didn't have vocabulary for most of what the vision was showing him. He caught fragments: the dungeon had been designed to contain and cycle ambient mana, drawing it from the surrounding area, processing it through a tiered monster ecosystem, and returning it to the surface in a stable, usable form.
The core was the center of it. The core regulated everything, threat level, monster generation, spatial stability. The core was what made an F-rank dungeon stay F-rank instead of bleeding into whatever the surrounding geology wanted it to become.
The core was fractured.
He saw that clearly, the way you see something you've already understood intellectually but haven't yet felt: the fracture wasn't new. It had been propagating slowly for months, probably, a structural failure in the dungeon's foundational mana architecture. The spatial anomaly wasn't a sudden event. It was a threshold being crossed, the point where slow deterioration became rapid collapse.
And rapid collapse, for a dungeon built under an academy, embedded in the mana geology of an entire district.
The vision ended.
He was back in the chamber, on one knee, right hand pressed flat against the stone where he'd caught himself. His nose was bleeding. His Mana Sense was screaming a sustained input that took him several seconds to resolve into something coherent.
The dormant signature in the chamber was no longer dormant.
[Ding!]
[Mana Core Fragment analyzed. Dungeon Origin Insight gained.]
[Warning: Dungeon Core destabilizing. Cataclysmic collapse imminent if not stabilized.]
[Objective Updated: Stabilize or destroy the Dungeon Core before critical threshold.]
[Warning: 31 minutes to critical threshold.]
He processed that in the time it took to get back to his feet, which was approximately three seconds, and then the Mana Golem finished waking up and he stopped processing anything that wasn't immediately relevant to staying alive.
---
It assembled itself from the chamber floor.
That was the only way to describe the process, the stone tiles under the artifact's hovering position cracked upward, and the mana that had been latent in the rock cycled into the structure rapidly, building a form that was roughly bipedal and roughly two meters tall and composed of compressed rock threaded through with active mana channels that Yuan could track clearly with his Sense. The channels were its vascular system, cut them and the form destabilized. They ran along the inner surface of each limb, converging in the chest cavity.
C-rank, guardian type. It had been sleeping in the floor, presumably, for however long the fragment had been sitting here.
It oriented toward him and raised one arm.
Yuan activated Shadow Step.
The arm came down on empty floor. He was already at the Golem's left flank, inside the swing radius, and drove two fingers into the mana channel running along the inner forearm. Not a punch, targeted pressure, precise, the way you'd press a bruise if you wanted to understand exactly where it was. The channel spiked and destabilized for a fraction of a second and the Golem's left arm lost coherence at the elbow, the structural mana flickering.
Then Shadow Step dropped him back out and he was across the chamber, cooldown running.
Nine and a half seconds.
He used them.
The Golem's architecture was simpler than the Gargoyle King's, less biological, more mechanical, which meant its weaknesses were engineering problems rather than anatomical ones. The mana channels were load-bearing. Interrupt enough of them simultaneously and the form couldn't maintain cohesion. He needed to hit the convergence point in the chest, but the chest was the most heavily reinforced section, the channels there triple-layered, and getting to it meant getting through the outer limb defenses first.
Stony Skin meant he could absorb one solid hit.
Probably.
Shadow Step came off cooldown.
He went in twice more in quick succession, right flank, then immediately left, shorter repositioning distances to keep the cooldown windows tighter. The right-flank strike took out another forearm channel. The left-flank strike caught the knee joint and he felt the impact transmit back through his hand harder than expected, the Golem's composition denser than the outer surface suggested, and Stony Skin absorbed the feedback and kept his wrist functional.
The Golem swung wide on the third pass and caught him across the shoulder.
He went into the wall. Stony Skin took the impact, he felt it as distributed pressure rather than concentrated force, the difference between being hit and being leaned on very hard. He came off the wall already moving and Shadow Step pulled him to the chamber's far side.
[Ding!]
[HP: 71/100]
Twenty-four points through Stony Skin's mitigation. Without the passive, that hit would have been significantly worse. He filed that with genuine appreciation and kept moving.
The Golem was slower now, the knee joint strike had compromised its tracking, the left side of its body running behind the right. He circled right, exploiting the lag, and on the fourth pass he went for the chest.
Shadow Step put him directly in front of it, inside both arms, close enough that normal combat logic said this was the worst possible position. He drove the heel of his right palm into the chest convergence point with everything his Strength stat and body weight could produce.
The mana channels spiked simultaneously.
The Golem made a sound like a sustained high note played on stone and then the form came apart from the inside out, the structural mana losing coherence in sequence from the chest cavity outward, and then it was rubble and residue and Yuan was standing in the middle of it with his palm still extended.
He extracted what was left of the core on instinct. Smaller than the others, almost vestigial, the Golem having been more construct than creature, but it was there, and his talent took it regardless.
[Ding!]
[C-Rank Mana Golem defeated. Experience +150]
[Ding!]
[Level Up! You have reached Level 2.]
[Available Stat Points: 5]
He stood very still for a moment.
Then he opened the full status window and looked at the five unallocated points sitting next to his stats, each one a question about what came next and what he expected to need and which deficiencies were going to matter most when he reached the bottom of a dungeon that was collapsing under an occupied building with twenty-nine minutes left on the timer.
Strength eleven. Agility twelve. Sense eleven. Vitality twelve. Intelligence ten.
Five points. He had to think about this correctly.
He looked at the fragment, still rotating, still pulsing, the crack above it still incrementally widening with every beat.
Then he looked at his right hand, and thought about the vision, and thought about stabilize or destroy, and thought about what the dungeon core was going to look like when he reached it and what he was going to have to do when he got there.