Gellan’s palms told him before his eyes did.

Three hundred meters below the garrison level, in corridors that had been Pallid living space before the war and were now archive access tunnels reinforced with Dominion stonesteel bracing, the stone changed temperature overnight. A subtle shift — surface people would dismiss it as ambient variance. But Gellan was not a surface person, and the stone spoke to Pallid hands the way sheet music spoke to trained musicians: in increments so small they were meaningless except to someone who had spent their life calibrating their skin to the language of rock.

Two degrees. Maybe three. The usual baseline in the deep corridors was consistent — stone at that depth held its temperature the way a bell held its tone, steady and absolute, changing only when the geothermal vents shifted or the seasonal water table pressed against the lower fault lines. Neither had changed. The vents were stable. The water table was where it belonged.

The stone was warm because something underneath it was warm.

He knelt in the corridor and placed both palms flat against the floor. The stone-tap exercise — the Pallid practice of reading geological information through direct physical contact — was not magical. It was trained sensitivity. A Pallid stone-speaker could detect vibration patterns, temperature gradients, density variations, and moisture content through sustained palm contact at ranges of up to thirty meters in good substrate. Gellan’s range was better than most. The archive tablets he’d retrieved during the siege had been located through stone-tap, identified by density before he’d ever seen them.

The floor was warm. Warm the way a living body was warm — the heat distributed evenly across a forty-meter radius that had, twelve hours earlier, been exactly the same temperature as every other corridor on this level. No forge-platform heat, no localised industrial source.

Within that radius, the fungi were dead.

The bioluminescent growths that the Pallid used for corridor lighting — cultures maintained across generations, seeded on specific substrate patches where the mineral content supported their metabolism — covered the walls and ceiling in irregular patches of soft blue-green light. In the forty-meter radius around the warm zone, every patch was dark. Dead, all of them. The fungi had released their substrate bonds and sloughed off the stone in thin translucent sheets that crumbled when touched. The stuff underfoot felt like wet paper.

Gellan counted the dead patches. Fourteen. The furthest was thirty-eight meters from the temperature epicentre. The closest was directly overhead, in a ceiling patch that had been the brightest in the section twelve hours ago.

Forty meters. The first pulse — the one he’d sensed during the Sorrath siege, logged in his archive notes alongside the description "single heartbeat, below" — had affected a radius of roughly twelve meters. Measurable only through stone-tap, invisible to anyone without trained Pallid sensitivity.

This one was three times larger. And visible.

He pulled his hands from the floor and stood.

"Stone-Speaker?"

The voice came from behind him. Corporal Soren Hald — a human, Dominion garrison, twenty-six years old, assigned to the Morreth deep-patrol rotation eight months ago. Hald was the liaison the garrison commander had assigned to Gellan’s archive team — a bureaucratic appointment that served the dual purpose of providing security to the Pallid archive and giving the garrison a set of eyes in the deep levels where Dominion soldiers historically did not go.

Hald was also learning stone-tap.

By curiosity, not assignment. He’d watched Gellan read the corridors during the first month of his posting, asked questions, and received the Pallid response to curious outsiders: silence, followed by a demonstration, followed by daily practice sessions that Gellan administered without explanation because Gellan did not explain things, he showed them, and the showing was the explanation.

Hald was not good at stone-tap. He would never be good at stone-tap — his hands lacked the subcutaneous nerve density that Pallid physiology developed in the first years of underground life. But he could detect temperature shifts through direct contact, and he could, with concentration, distinguish between three categories of vibration: structural (stable), seismic (moving), and biological (living).

He was standing six meters back, behind the edge of the dead-fungi radius, looking at the darkened corridor with the expression of someone who understood they were seeing something but not what.

"The light’s out," he said.

"The fungi are dead."

"All of them?"

"In this radius. Forty meters."

Hald processed this. "Is this — the same as last time? During the siege?"

"Larger."

Gellan did what he always did. He recorded.

The archive tablet he’d carried for three years — a flat piece of local slate, smaller than the historical tablets, personal-use format — accepted the stone-tap notation with the efficiency of a tool designed for one purpose. Temperature. Radius. Fungi death pattern. Timestamp (estimated: between the eighteenth bell and the fourth bell, overnight, while the deep corridors were unmanned). Depth: three hundred and ten meters below garrison level.

He did not write a conclusion. He did not speculate. Gellan’s archive methodology was descriptive, not interpretive — the same principle that had guided the Pallid stone-speakers for the uncounted generations before the Dominion had arrived and added names to the practice.

But the pattern was plain.

Two pulses. The second was larger than the first. The interval: fifteen years. The depth: the same. The signature: thermal, biological in its regularity, rhythmic in the way that things with metabolisms were rhythmic.

A heartbeat.

Slow. Vast. Measured not in seconds but in years.

Halric received the report through the whisper-quartz relay at the fourteenth bell. Standard format — sensor report, deep corridors, attached observation from the Stone-Speaker, priority notation: medium.

Gellan had not flagged it as urgent. Because it wasn’t. The entity — whatever it was — was not threatening. It was not moving. It was not approaching the garrison. It was lying beneath hundreds of meters of solid rock in a geological formation that had been stable since before the Pallid arrived, and it was doing what it had always done: existing, slowly, with a pulse rate measured in decades.

Halric forwarded the report to the southern relay station for transmission to Neth’s intelligence office.

Neth received it at the seventeenth bell. Alongside seventeen other dispatches. He cross-referenced the thermal signature against the Morreth deep-survey anomaly log — Year 382 AF, siege period, filed under anomaly — unclassified, single occurrence.

Single occurrence was no longer accurate.

He re-filed it. New classification: pattern — unclassified, two confirmed occurrences, interval ~15 years, scale increasing.

He wrote one note at the bottom of the cross-reference log: Pattern, not anomaly. Watching brief assigned. No action recommended at current assessment level.

Filed it. Moved to the next dispatch.

In the deep corridor, Gellan knelt again. Hald stood behind him, watching.

Gellan placed his palm flat on the warm stone. The heat was already dissipating — the pulse’s thermal signature fading at the rate of rock cooling, which meant the heat source was deep enough that the surface temperature was residual, not sustained. Whatever had pulsed was already quiet again. Resting. Waiting.

He tapped the stone once with his right hand — the Pallid notation for acknowledge, the way a stone-speaker greeted a formation they’d identified. Recognition, not communication.

Then he tapped a second sequence. Four strikes. A word in Pallid stone-tap that Hald had never heard before.

Hald frowned. "What was that?"

Gellan looked at him. Yellow-white eyes, filmed with the deep-dark adaptation that Pallid stone-speakers developed after decades underground.

He did not translate.

"An old word," he said. "For something none of us have been close enough to name."

He withdrew his hand. Stood. Walked back toward the archive corridor, the dead fungi crunching softly underfoot in the darkness.

Hald stood alone in the warm corridor for another thirty seconds, trying to feel through the soles of his boots what Gellan had felt through the palms of his hands. He felt warmth. Nothing more. The language was not his — not yet, maybe not ever — but the warmth was real, and the dead fungi were real, and the word Gellan had not translated hung in the air like a name that had been spoken for the first time in a very long time.

He followed Gellan back toward the light.