Soren looked at the far wall. Then at Clyde. Then at the blade.
"Crescent Severance," he said quietly, as though confirming something to himself. "First phase. Scales with total resonance and Lunar Ichor volume." A pause. "You understand that most Ichorborn at your phase require several additional weeks before the wave stabilizes sufficiently for ranged output."
"Is that a problem?"
Soren adjusted his glasses with one finger. "It's a data point," he said. "One I'll be thinking about."
He picked up his own blade and returned it to its sheath with the unhurried motion of someone concluding a demonstration that has served its purpose.
"Practice the internal layering tonight before you sleep," he said. "Not the external extension — not the blade, not the release. Only the internal wave. Familiarize yourself with the feeling of it holding steady under different conditions. Walking. Sitting. When your breathing changes. When your attention is divided." He looked at Clyde directly. "And read the warnings in the back section of the manual before you practice anything unsupervised."
"I already found some of them."
Something moved in Soren's expression — brief, precise, the outer surface of his composure adjusting by a fraction before resettling.
"All of them," he said. "Not some."
The next morning, Clyde returned to his class.
The Academy's corridors received him with their familiar morning quality — the lamplight finding its customary corners, the stone floors carrying the accumulated cold of the night through their surface, the ambient sound of an institution in the process of assembling itself for the day gradually filling the halls as students arrived from the city's various districts and faculty members moved between rooms with the purposeful rhythm of people whose schedule has been established long enough to have become reflexive.
He taught the morning's first session without incident.
Pre-Cataclysm history — the period before the sun's cessation, the Egyptian-era civilization that had organized its entire relationship with time around a star that no longer existed. He moved through the material with the steady, measured fluency of someone who has taught a subject long enough to have found the most effective path through it, his voice carrying the particular authority of genuine familiarity rather than performed confidence. Names. Dates. The fragmented accounts of a civilization mid-transition between shadow-based timekeeping and the pendulum mechanisms that had begun supplementing it in the years immediately before the Cataclysm, frozen at that midpoint by an event that made the question of time-measurement briefly irrelevant and permanently altered.
The students listened. Took notes. Occasionally asked questions that suggested they were genuinely engaged rather than performing engagement. The session moved at the pace of material that has been taught well — unhurried, because unhurried is not slow when the material is dense enough to warrant the attention.
The second session began the same way.
Clyde was mid-sentence — the chalk completing the latter portion of a timeline along the board, his voice carrying the last clause of an explanation of the pre-Cataclysm trade networks — when the pressure arrived.
It arrived the way certain things arrive that are significant — not dramatically, not with the theatrical announcement of something performing its own importance, but with the quiet, comprehensive quality of a physical fact asserting itself. A density in the air at the corridor-facing wall of the classroom. A weight that pressed against the back of his awareness with the patient insistence of something that was simply present and was prepared to remain present for as long as it needed to.
His chalk continued moving.
His voice continued.
The students noticed nothing — which told him something immediately. Whatever was in the corridor beyond the classroom door was operating with a level of ichor concealment that made the average student's perceptual range entirely insufficient for detection. This was not the ambient, unmanaged presence of something that had wandered into proximity. This was the deliberate, practiced concealment of something that understood exactly how much of itself to suppress and had suppressed precisely that amount, leaving only what it chose to leave — the residual pressure that reached Clyde not through any ordinary sensory channel but through the Hollow Star, which was sensitive to lunar ichor in ways that no other phase-one ability was equipped to be.
His Astral Card pulsed once — a single, brief intensification of the rhythm behind his sternum, the card's version of an alert, the Hollow Star communicating what his conscious perception had not yet fully assembled into a conclusion.
Something in that corridor was extraordinary.
Not in the way that Aldric was extraordinary — the deep, weathered density of someone whose Abyss Ichor had been recalibrated over decades, the power of long mastery expressed as a settled, structural quality. This was different. This carried the particular character of ichor that had been developed to a phase so far beyond his own that the gap between them registered as a physical property of the air — the way altitude registers as pressure against the eardrums, not through any specific stimulus but through the simple, accumulated fact of the difference in elevation.
He dismissed the class early.
He did it with the composed, unhurried delivery of someone who has a plausible reason and is presenting it plausibly — a scheduling adjustment, a rescheduled faculty meeting, the lesson to be continued tomorrow. Chairs scraped. Students gathered their materials. Footsteps filled the corridor briefly as the class dispersed into the Academy's morning flow, the particular social energy of students released early carrying them away from the classroom door and down the hall.
The corridor fell quiet.