Pressure Spikes and Cold Iron

The vibration started in my boot soles before the pressure gauge even twitched.

Down in the lower gantry, forty feet below the primary lantern room, eighty-five pounds of live steam hammered against a sticky bypass valve. If that valve seized completely, the main boiler manifold would split like an overcooked sausage. That meant no beacon, no void-skiff navigation, and a very short conversation with Murchadh that ended with me getting tossed off the edge of the Shard without a parachute harness.

I slung my heavy canvas tool roll over one shoulder and grabbed the handrail.

The iron stairs leading down through the gantry were slick with condensate. Every breath tasted of boiled copper and sulphur. The beacon's light above carved long, blinding spokes through the mist, turning the surrounding fog into a churning kaleidoscope.

"Just a stuck float," I told myself, checking the safety clip on my belt. "Tap the housing, tighten the packing gland, go back upstairs."

I reached the bottom landing where the secondary steam lines branched into the condenser array. The air was thick and hot enough to wilt cabbage. Right in front of me, the bypass valve was rattling violently in its brass saddle, screeching like an angry kettle.

I unclipped my fourteen-inch steel spanner.

The tool felt solid, cold, and reassuringly dull in my leather palm. I wedged the jaw against the valve's stuck stem and leaned my weight into it. Metal groaned. The valve budged an eighth of an inch, venting a sharp hiss of white vapor across the catwalk grating.

Then the reflection on the polished brass dome warped.

The shape carried no human cheekbones or neat hair. Long, needle-thin limbs folded behind the curve of the metal, and two milky, unblinking eyes stared out from the bronze patina.

My stomach dropped straight into my boots.

The brass dome bulged outward. The surface rippled like cold oil under a torch flame, and then the creature tore through the metal surface with a sound like shattering ice.

It dropped onto the gantry four paces in front of me.

The grating clanged under its landing weight. The thing stood crouched, taller than a man, its flesh a translucent mosaic of fractured silver and smoky glass. Frost crunched along its joints, reacting against the scalding steam in the room. It had no lips, only a maw packed with serrated crystal teeth that dripped gray, foul-smelling ichor onto the steel plates.

Starving.

The word hit me like a psychic slap, raw and frantic, radiating from the creature's shattered aura.

The beast lunged.

I did not stop to file an incident report. I swung the fourteen-inch spanner with both hands.

The heavy steel slammed into the creature's cheek with a wet, ringing crunch.

The blow sent fractured shards of glass spraying across the deck. The monster shrieked—a high, glass-grating wail that made my molars ache—and staggered sideways into the safety railing. Black, tar-like blood smeared across the iron rungs.

"Physical," I grunted, stepping back into a defensive crouch. "Good to know."

The specter shook its head, glass clicking against glass. It hissed, its jagged claws raking sparks from the grating as it sprang again, aiming straight for my throat.

I ducked beneath the sweep of its left claw. The razor edge clipped my leather collar, shearing clean through two layers of cowhide and nicking the skin at my collarbone. Pain flared, hot and sharp, but I had already dropped low.

I hooked my boot behind the valve's manual purge lever.

"Drink this," I snapped, and kicked the lever flat.

The bypass line blew wide open.

A jet of superheated, four-hundred-degree steam erupted from the blowdown nozzle in a deafening roar. The plume caught the feral beast square in its crystalline chest.

Live steam collided with the beast's sub-zero glass flesh. Spiderweb fractures ripped across its torso with rapid-fire pops, sounding like a sack of light bulbs under a sledgehammer. The creature howled, thrashing blindly in the scalding cloud as its limbs fractured into useless shards of cloudy quartz.

It scrambled backward on broken elbows, scrabbling desperately at the slick grating.

I did not give it room to regroup. I stepped through the mist and brought the flat of my heavy spanner down across its neck.

The crystalline spine snapped with a sharp crack.

The monster's body dissolved into a shower of harmless, fine silver sand that sifted through the iron grating, tumbling down into the bottomless void below.

Silence rushed back into the gantry, broken only by the steady hiss of the cleared bypass valve.

I leaned against the handrail, panting hard. My heart was hammering a furious rhythm against my ribs, and the cut on my collarbone stung with caustic vapor, but my hands were completely steady as I hauled the purge valve back into its locked position.

The boiler pressure needle dropped smoothly back into the black notch.

"Well," I muttered, wiping the spanner clean on my trouser leg. "That takes care of the vibration."

A soft chime of laughing glass sounded from the catwalk above.

I snapped my head up.

There, perched inside the cracked convex glass of the secondary pressure gauge, was Tighearnan's silhouette. He sat cross-legged within the silvering, resting his chin on one hand, his dark eyes wide with predatory amusement.

"You hit hard for a meat-sack," his voice echoed softly from the gauge.

"Get out of my glass," I said, pointing the greasy end of my spanner at him.

Tighearnan did not flinch. His smile faded, replaced by a dark, assessing look that swept over the silver sand still clinging to my boots.

"That was Oighrig's scout," he said, the teasing edge gone from his tone. "Her faction is starving faster than mine. They are done waiting behind the silvering."

He leaned closer to the inner surface of the gauge, his hand pressing flat against the glass from inside.

"The next ones won't come alone, glazier. And they won't stop at the lower valves."