Jean did not linger. The hinges of the heavy door rattled in their frame as she pulled on her gauntlets and strode into the corridor, her orders barking against the stone walls. Squad Four to the east gate. The explosive-handling team to the Whispering Woods with shovels and sand carts. If the rain came before they dug out the twelve boxes, the northern trench would become a lake of red fire.
Her footsteps faded down the spiral staircase, swallowed by the shouting in the lower yard.
Silence filled the Acting Grand Master’s office again. It was a thick, stagnant quiet, disturbed only by the distant clatter of wagon axles on cobblestone.
Albedo did not move toward the door. He did not look at the maps on the wall, nor did he watch the street where the vanguard was assembling. Instead, he reached into his vest, pulling out a brass spindle identical to the broken one hidden in Klee's sleeve.
He laid it on the desk blotter.
The metal caught the pale noon sun. It was pristine. The teeth of its internal gears were cut with razor-thin tolerances, free from the grease and pit-corrosion that covered Klee’s own component. It possessed the same squared axle, the same triple-grooved balance wheel, and the same central bore designed to take a high-density abyssal drive-pin.
Klee kept her hands in her lap. The skin under her left gauntlet went cold.
"Where did you find that?" she asked.
"I did not find it," Albedo said. "I machined it."
He stepped closer to the desk, resting the tips of his gloved fingers on the polished wood. His voice was level. It lacked the alarm that had tightened Jean’s shoulders.
"Three nights ago, an anomalous core dropped out of a dormant Ruin Grader near the Falcon Coast," he said. "Its architecture did not match the standard Khaenri'ahn field engines cataloged by the Ordo. The internal drive was calibrated to an inverted gravitational axis. When I disassembled the casing, I found the schematic for this regulator etched into the ceramic stator."
He pushed the spindle toward the edge of the desk.
"I spent forty hours at the lathe cutting the gears from bell-metal brass," he continued. "I finished the casing at dawn. I have not yet cut the balance spring, because I lacked the correct tensile steel. Yet here you are, carrying the completed assembly."
Klee’s jaw tightened. She reached inside her cuff. Her fingers gripped the battered cylinder, feeling the jagged edge where she had forced the lock-pin through the housing. She pulled it out and set it beside his.
The contrast was brutal. Hers was blackened by fire, the brass dulled to the color of wet mud. The balance wheel was canted sideways, jammed by the rough steel pin she had hammered through the housing to stop the gear-train from turning. Where Albedo’s piece was an instrument of immaculate craft, hers looked like an artifact dragged out of a collapsed chimney.
The moment the two spindles sat within six inches of one another, the air between them grew thin.
A faint, high-pitched whine rose from the desk. It was not a sound heard with the ears. It vibrated directly behind the bridge of Klee's nose, setting off a sharp pulse of nausea. The jammed balance wheel inside her broken spindle gave a wet, metallic shudder.
Albedo looked down at the twin objects. His eyes widened a fraction of a millimeter.
"The resonance," he whispered.
"Pick it up," Klee said. Her voice was flat. "Move it away."
"Why?"
"Because when the two rotors align, the field collapses inward." She leaned forward, the iron plates on her boot-soles scraping the floorboards. "You think you made the first one. You didn't. You made a copy of something that fell out of the sky six hundred years ago, and that thing only fell because you built this one today."
Albedo did not reach for the brass. He tilted his head, regarding her with that terrible, dissecting calm she remembered from long nights at the laboratory bench on Dragonspine.
"A closed loop," he said. "An effect masquerading as its own cause. That would explain the temporal displacement reported at the Temple. If the spindle functions as an anchor, the iron ring is not rising from the past. It is falling from your present."
"It's not falling," Klee said. "It's drilling."
Outside, a gray sheet of cloud rolled over the sun. The warm light vanished from the desk, replaced by the dull, leaden hue of an impending storm. The first fat drop of water struck the diamond pane of the window, leaving a crooked smear across the glass.
Klee counted the seconds. One. Two.
The Whispering Woods were three miles away. If Jean’s sappers took the road, they would need twenty minutes to clear the gate and reach the hollow tree. The paraffin seals on the twelve charges were three years old in her memory, but here they were fresh—pressed yesterday, sweating raw sulfur through their seams. If the ditch filled with water before the knights lifted the crates, the mercury caps would float.
Once they floated, the striker pins dropped.
"Jean will not reach the cache in time," Albedo said, following her gaze to the window. "The rain is coming from the north. The lower hollows will flood within ten minutes."
"I know," Klee said.
"You gave her the location to remove her from the city."
Klee looked up at him. She did not blink. The salt-scars across her cheeks pulled tight.
"I gave her the location because I didn't want the road blown to gravel," she said. "The wagon trains need that road. If the trade route collapses, the south gate starves by midwinter."
"Mondstadt has three years of grain stored in the cathedral vaults," Albedo replied smoothly. "We do not starve."
"You did," she snapped.
The words were out before she could catch them. They hung between them like smoke from an unvented forge.
Albedo did not argue. He reached out and picked up her ruined spindle.
The moment his fingers touched the scorched brass, the broken balance wheel violently kicked. The lock-pin Klee had wedged into the housing sheared off with a dry snap. The freed gears shrieked, spinning on their bearings at blinding speed, shedding flecks of dried graphite across his pale palm.
A wave of heat washed across the blotter.
Albedo dropped the spindle. It hit the wood, spinning like a top, gouging a spiral groove into the dark oak. Beside it, the clean spindle he had made began to rotate in the opposite direction, drawn by an invisible magnetic drag.
The air in the room dropped ten degrees.
Klee drew her knife. The blade was short, ground down from a broken leaf-spring, its edge serrated to cut through hemp and damp fuse-cord. She brought the pommel down hard on the spinning balance wheel.
The iron hit the brass with a dull clank. The shriek died.
The gears stripped under the blow, spitting teeth across the desktop. One of the brass fragments nicked Albedo's cheek. A thin line of crimson beaded against his chalky skin. He did not wipe it away.
He looked down at the blood on his finger, then at the shattered mechanism beneath Klee’s knife.
"The alloy," he said softly. "It is not brass."
"It’s river-iron and dross," Klee said, her breath coming hard. "You melted down your own alembics when the supply lines broke. You had nothing else to pour into the molds."
Albedo looked at her face. For the first time, the detached scholar vanished from his eyes. What replaced it was something cold and heavy, a realization that settled into his features like frost on stone.
"What became of me?" he asked.
The cathedral bells began to ring again. It was not the slow five-o'clock strike. This was the rapid, uneven clanging of the alarm bell—the iron clapper striking the lip twice with every swing.
Fire in the valley.
The mercury had shorted.
Klee looked down at the desk. The twelve crates were gone now. The hollow tree was a hole in the earth, and the road to Springvale was choked with burning mud and broken pine trunks. Jean was out there in the rain, surrounded by steam and shattered stone, trying to understand how a stranger had known the exact yield of the blast.
"You stopped asking questions," Klee told him.
She pulled the knife back, wiping the blade on her dun trousers. The sheared spindle was completely dead now, its internal springs ruined, its casing cracked down the center line like a split walnut.
Albedo touched the cut on his cheek. His finger came away red. He looked at the smear, then wiped it against his linen cuff, leaving a dark rust-colored streak on the pristine white cloth.
"The girl downstairs," he said. His voice was lower now, quiet enough that the clanging from the belfry nearly buried it. "She spent the morning crying because she dropped her sketchbook into the fountain. She cannot sleep without a candle by her cot."
Klee did not answer. She felt the heavy, dead weight of her Vision against her ribs. The ember inside remained cold, drowned under layers of grey ash that no amount of breath could stir.
A thump sounded from the floorboards directly beneath their feet.
It was not the vibration of the distant blast. It was a rhythmic, impatient knocking from the lower annex. Someone down there was kicking the ironwood door with the heel of a soft red calfskin boot, demanding to be let out into the rain.
The lock-pin had snapped, the cache was gone, and the rain was falling harder against the glass, drumming a steady, hollow beat that sounded like thousands of tiny hammers striking an empty shell.
Albedo looked at the door, then down at the stripped gears scattered across Jean's desk.
"You should not have come back," he said.
Klee reached down and gathered the broken pieces of brass into her scarred palm, closing her fist until the sharp teeth dug through her callous and touched the meat beneath.
"I didn't have a choice," she said. "The sky opened."