I began the compression on Day 39.
What it felt like: every cell in my body receiving a very specific instruction to be smaller and denser, and having extremely mixed feelings about this. The Library's speed-of-thought enhancement rendered each individual protest at high resolution, which was the opposite of useful but was apparently unavoidable.
What it actually was: a controlled collapse inward, held stable by eight elemental channels running simultaneously, each one contributing to the load distribution in a specific way. Fire managed the heat of compression. Water managed the pressure differential in the fluid systems. Earth managed the structural bracing. Air managed the atmospheric pressure in the lung tissue. Lightning managed the neural transmission speed so I could keep processing through the noise.
Light managed the information — keeping a running record of the compression state so I could detect deviations before they became failures.
Time and Space, incomplete as they were, contributed something I hadn't expected: a reference point. The Time seed's capacity to hold the record of change meant it could show me the difference between the architecture's current state and its recent past in real time, which was the most useful diagnostic tool available. The Space channel's dimensional perception meant I could feel the geometry of the compression — the shape of the collapse — in three dimensions.
I ran it at fifteen percent intensity for the first three days. Daily operations continued. The sensitives sessions continued. I neutralized the first relay station on Day 41 — a Water-aspect structural degradation applied to the receiver components during a scheduled maintenance window that Nassiri arranged without asking too many questions. The second station went on Day 43.
On Day 44, the compression was at thirty percent intensity.
My mana capacity was at 3,100 units and rising. The Earth-lattice was doing significant work holding the truss against the compression gradient. The cooling channels were running continuously.
On Day 45, I was in a session with the latest group of sensitives — seven people, a mix from Zone Four and the northern sector — when the left hand did something unexpected.
**Earth: Day 45, Hour 14**
The session was routine. I was demonstrating the baseline Earth-sense technique to a Zone Four structural engineer named Pita who had been running the perception accidentally for three weeks without knowing it, using it to assess building stability before declaring them safe for civilian occupation.
She had saved, by conservative estimate, forty-seven lives this way, operating on instinct and a vague feeling about what felt right or wrong about a building's load distribution. Giving her the framework was going to make her significantly more precise and significantly safer.
I was showing her how to distinguish between the near-field substrate reading — the building she was standing in — and the background noise of deeper geological structure, when the compression gradient did something the Stone had not flagged as a risk.
The truss system had been distributing compression force across the architecture in a pattern built around the Dead Zone's position. For forty-five days on Earth and most of the sprint on Avulum, the pattern had been: force routes away from the Dead Zone, around the obsidian tissue, into the Earth-lattice bracing and the Air-bypass circuits that ran along the bone structure in the left arm.
What I had not fully accounted for: the bypass circuits ran through the bones, not around them. The Air-aspect mana channels followed the nerve pathway geometry, which in the left arm meant they ran directly adjacent to the ulna and radius.
At thirty percent compression, the force distribution through the truss was applying lateral stress to those bones.
The ulna in my left forearm developed a hairline fracture at 14:22.
I felt it. Not pain — the Dead Zone had no pain receptors. I felt it as an interruption in the Air-bypass circuit, a 0.04-second gap in the left-side processing that the Stone registered as a structural integrity alert.
I completed the sentence I was saying to Pita. Kept my expression level. Finished the demonstration.
Then I excused myself, citing a maintenance check, and went to find somewhere quiet to run the damage assessment.
The fracture was minor. Hairline. In a normal bone with normal healing rates, it would repair itself within days. The Earth-lattice's structural memory function could accelerate the process significantly — the same technique I'd used on Dani's hand, applied to my own architecture.
The problem was not the fracture itself.
The problem was what the fracture indicated about the truss geometry.
I ran the structural analysis in the Library, projecting the compression at current and planned intensity levels against the identified stress point. The fracture was not a random failure. It was the first sign of a systematic flaw in the load distribution — the bypass circuits were being compressed against the bone structure, and at higher intensities, the stress was going to increase.
At fifty percent compression: probable further fractures.
At seventy percent: possible structural failure of the left forearm.
At full compression required for Tier 4 transition: the model produced outcomes I was not going to let happen.
The Architect's truss design had not accounted for this. Or rather — I ran the message again, looking for what I'd missed — it had, but obliquely.