The double’s face shifted.
The calm, reasonable expression vanished like grease wiped from an iron griddle. Its jaw tightened, its lips pressed into a thin, bloodless line. Its flat hazel eyes seemed to lose whatever faint imitation of humanity they had held. The transformation was instant, silent, and chillingly clockwork.
“Claimant reconciliation rejected,” the double said. The voice was still Len’s. But the inflection had flattened into an emotionless drone, like a self-running dispatch announcer reading train schedules at an empty station. “Activating Section Nine: Administrative Resolution by Mortality.”
“Here it comes!” Doma roared.
The double didn’t gather its weight to jump. It didn’t crouch or push off with its calves. With the impossible gaining speed of Burdenless Step, it simply slid across the floor, its boots skimming over the stone flags as if gravity had been abolished beneath its soles.
It covered the six feet between the pantry threshold and Doma’s iron poker in less than half a second.
In the training rings of the Northern Postal Guild, instructors spent three years drilling young couriers in the physics of footwork. A man who weighed one hundred and sixty pounds couldn’t alter his direction without pressing fifty pounds of reactive force against the earth through the ball of his pivot foot. When an apprentice lunged, his hip dipped, his hamstring bunched, and his boot leather groaned against the floorboards. The eye of an opponent tracked that muscular wind-up to predict the line of attack.
The double offered no such test signals. It didn’t sink into its hips. It didn’t dig its heels into the mortar seams. It was as though the creature were suspended from an invisible overhead frame trolley rolling along an overhead rail, drawn forward by a clockwork balance weight that removed the friction of the stone floor. The air around its body didn’t churn with the displaced wake of a charging man. It moved through the rotten-egg gloom with the terrible, silent speed of a shadow cast across a sundial.
Doma swung the heavy fire-poker in a level strike aimed squarely at the creature’s neck. The iron bar whistled through the green light. It was driven by forty pounds of muscular force and twenty years of bitter experience fighting in the town militia.
The double didn’t duck. It didn’t try to block with a weapon.
With terrifying care, its left hand shot out and caught the flying iron bar two inches below the tip.
The impact made a wet, heavy crack that echoed off the vaulted ceiling like a gunshot. The force of Doma’s blow was enough to fracture an ordinary man’s wrist. But the double’s arm barely shifted. Burdenless Step instantly scattered the moving shock laterally through its frame, shunting forty foot-pounds of dynamic energy into the air without displacing its feet by a single inch.
Doma gasped, her shoulders wrenched forward by the sudden dead stop.
The double twisted its wrist with clockwork leverage. The iron bar wrenched out of Doma’s calloused grip. It tore the skin along her thumb, and clattered harmlessly against the stone hearth. In the same fluid motion, the copy stepped past her guard, its right shoulder driving into her chest with the driving force of a runaway coal cart.
Doma flew backward, slamming hard against the heavy oak worktable. The impact overturned a rack of glass measuring pipettes and two clay pot medicine jars. It sent shards of green glass and amber syrup splashing across the zinc surface. Doma collapsed onto the stone floor, gasping for breath, her hands clutching her bruised ribs.
“Doma!” Len yelled, lunging forward with his sounding pole.
He had no combat training. The Northern Postal Guild taught couriers how to run, how to ford swollen streams, and how to balance heavy packages on narrow ledge trails. But it didn’t teach them how to fight a duplicate of themselves that felt no pain and weighed nothing on its feet.
Len drove the iron-shod tip of the sounding pole toward the double’s chest, aiming for the polished lead badge pinned to its lapel.
The double reacted with Len’s own reflexes, moving with the agile sidestep of Surefoot. It slipped inside the thrust of the wooden pole. That let the iron tip graze harmlessly past its left rib. Then he brought its right hand up in an open-palm strike aimed at Len’s chin.
Len threw his head back just in time. The heel of the double’s hand clipped his collarbone, the blunt force numbing his shoulder and knocking him off balance.
The blunt impact numbed the entire left side of Len’s upper torso. It sent a shower of bright red sparks through his vision. He staggered backward, his boots sliding across the slick flat stone slabs. Shards of broken medicine phials crunched beneath his heels, grinding into the leather welt. But his Surefoot baseline responded with instant, gut corrections. The tendons in his ankles adjusted their tension in fractions of an inch, biting into the wet grout between the limestone slabs, keeping his torso upright where an untrained man would have pitched backward into the shattered glass.
The air in the kitchen was now heavy with the choking reek of spilled harsh cleaning acid and boiling pea mash. The fumes stung Len’s nostrils and burned the back of his throat. But his Long Breath perk filtered the intake. It packed his chest muscle to draw clean air from the lower drafts near the floorboards. Yet even with five claimed levels running at peak smooth speed, the disparity was terrifying. Every movement Len made cost him body-energy fuel. His heart was hammering at one hundred and forty beats a minute. His lungs were burned, and cold sweat was stinging his eyes.
The double showed neither breathlessness nor sweat. Its skin remained as smooth and dry as polished soapstone. Its pupils were locked in the fixed, dilated stare of a taxidermist’s glass eyes.
Behind the double, in the unlit mouth of the pantry, the upright shadow channel flared with sudden, pulsing life.
Len caught a glimpse of it past the creature’s shoulder. The darkness behind the wooden stairs was no longer just an empty storage room. It had opened downward into a vast, terrifying deep pit. A tube-shaped shaft lined with heavy cast-iron channel rings. It dropped into the underground depths of the city like the bore of a huge cannon.
Deep inside the shaft, hundreds of feet below the kitchen floor, cold blue lightning flickered through heavy-duty cables. A dull, rhythmic throbbing shook through the air. The sound of a huge magnetic dynamo spinning in a sealed chamber, pumping millions of foot-pounds of tightly packed power into the town grid.
The double was not running on its own internal stamina. It was tethered to that shaft. Every step it took was energized by the high-voltage return current surging through the channel beneath the floor.
The ozone smell pouring from the upright shaft was so dense that Len could taste copper on the fillings of his back teeth. It was a high, shaking hum that seemed to bypass the eardrum entirely, resonating directly through the bones of the skull. This was the true engine of Rookvale. Not the coal-fired boilers or the steam hoists advertised on town posters. But an underground blood-flow system that fed upon the stolen thresholds of travelers. It drew the harvested potential of thousands of claimed milestones into sealed dynamos to keep the valley’s artificial canopy suspended against the sky.
“Ivara!” Len shouted, stumbling backward across the broken glass. His boots scrambled for purchase on the slippery stones. “The switch! Kill the circuit!”
Ivara didn’t touch the switch.
“Not the switch!” the land-mapper cried, her voice ringing out over the hiss of the copper lamps. “The switch only cuts the overhead lamps! It’s drawing from the main feeder! Get to the bench! Cut the channel braid!”
The double turned its head toward Ivara, its flat eyes cataloging the threat in a heartbeat. It realized instantly that the land-mapper was the only person in the room who understood the shape of its anchor line.
It abandoned Len.
With a low, dry hiss escaping its teeth, the double pivoted on its zero-drag heels. That turned toward the oak workbench where Ivara stood alone. Her single hand reached for the heavy tin shears.
“Tavi!” Doma wheezed from the floor, coughing up flecks of bloody foam as she struggled to rise. “Drop it! Drop the iron!”
From high in the dark rafters, thirty feet above the kitchen floor, a shrill yell ripped through the gloom.
Tavi dropped from his perch on the channel girder. He wasn’t dropping a loose bolt. The boy was falling with forty pounds of iron ballast clasped to his chest, hurtling down through the green cone of the center lantern like a falling gargoyle.
He aimed directly for the back of the double’s neck.
The double heard the rush of air. With unnatural speed, it began to twist its torso upward, raising its arms to deflect the falling weight.
“Now, Len!” Ivara screamed, grabbing the tin shears with her teeth, pulling them free from the leather sword sheath, and thrusting her sound right hand into the handle loops. “Hold the line!”
Len didn’t hesitate. Forgetting the pain in his bruised shoulder, he dropped the sounding pole, lunged across the hearth. Then he threw his entire body weight into a low courier tackle, aiming straight for the double’s knees.