Falling Stone

How much weight could a corroded iron grate bear before the bronze bolts sheared out of the brickwork? Xie Yunshan had his shoulder pressed hard against the underside of the flue cover, his boots slipping on greasy kiln-soot while the chimney below them vibrated like the skin of a war drum.

"Two inches to the left," Tan Fenglan said from the narrow rung beneath him. She held her bent bronze sounding rod against the masonry, her knuckles white with brick dust. "The mortar in the collar has already pulverized. Strike the hinge pin, not the plate."

Yunshan did not waste breath answering. He set the tip of his sapper pick against the swollen iron rivet and brought his hammer down with a short, brutal swing. Orange sparks flew into the humid draft. The rivet head snapped, bouncing down the vertical shaft into the blackness where Bai Tingxu clung to the lowest ladder rungs. With a violent heave of his back, Yunshan forced the square grate upward.

It slammed back onto the flagstones above with a hollow clang. Heat and the stench of scorched chaff washed down into the flue.

Yunshan scrambled through the opening, caught the Conservator by the wrist, and hauled her onto the floor of the Fourth Tier vault. Tingxu followed a heartbeat later, hauling himself over the lip with a butcher's heavy agility, his canvas sack of harvested chitin rattling against his ribs.

A hundred conscripts from the lower distribution shifts were crowding the northern gangways, screaming against locked descent grates. Sacks of raw barley had burst across the floor, forming treacherous golden dunes that shifted under rushing feet. Torches mounted along the square stone pillars smoked wildly in an unnatural updraft roaring up from the central grain chutes.

Yunshan froze, pressing the sole of his boot flat against the flagstones. The harmonic vibration traveled up through his shin, grinding forty paces to the east before tilting sharply toward the central bins.

"Get back to the piers!" he shouted, shoving Fenglan toward a square masonry column.

A heartbeat later, the center of the vault tore open.

The flagstones did not merely crack; they erupted skyward in a geyser of pulverized mudbrick and golden grain. From the dark cavity surged a segmented mass thicker than a siege tower, its hide encrusted with calcified barley hulls and ancient grey slag. It had no eyes, only an undulating ring of hooked feeding plates that expanded and contracted in rhythmic, wet gasps. Sacks of grain burst like dried bladders around them, showering the tier with stinging kernels.

"The Alpha," Tingxu yelled over the roaring air, backing toward a square pillar with his notched cleaver raised. "It tracks the stampede. It feels the conscripts running."

The great beast swung its blunt, armored head. A cedar support piling twenty paces wide took the impact. The timber groaned, split down its vertical grain with a sound like catapult fire, and rained heavy splinters across the fleeing workers. Three conscripts vanished beneath the sliding avalanche of crushed brick and writhing flesh.

"Archers, hold the hoist line!" a harsh, familiar voice bellowed from the upper gallery.

On the iron walkway twenty cubits above, Captain Qiu Mengze leaned over the bronze railing, his dark cloak pinned back by his sword belt. Beside him, Han Ba and a dozen garrison archers were already notching heavy bronze-tipped arrows wrapped in pitch-soaked flax.

"Loose!" Mengze commanded.

A volley of fiery streaks plunged through the vault. The arrows struck the creature's broad dorsal mantle, but the heavy ironwood shafts shattered or deflected off the thick, grain-hardened casing. Sparks skittered across the beast's back without piercing the shell. The fire did nothing except illuminate the immense ridges of pale chitin protecting its spine.

The Alpha recoiled from the light, thrashing its tail against the western load-bearing columns. Another arch cracked. Limestone dust rained down in thick sheets, blinding the conscripts on the gangway.

"Aim lower!" Yunshan screamed at the gallery, cupping his hands against the din. "The mantle is four inches of solid slag! You cannot pierce the spine!"

Mengze looked down through the rising smoke, his eyes narrowing as his gaze locked onto the Granary Mistress and her ragged companions amid the ruined bins.

"Then where do you want these arrows, sapper?" the captain shouted back.

"The lateral spiracles!" Yunshan roared, gesturing toward the beast's lower flank. "The breathing slits beneath the third ridge! When it expands to draw breath, the inner membrane is exposed!"

"Listen to the sapper!" Fenglan called out, raising her bent sounding rod toward the seam.

The Alpha reared, its blunt head scraping the vaulted ceiling seventy cubits above. As its chest plates expanded to hiss at the heat, six fleshy, valve-like slits opened along its pale underbelly, venting hot, sulfurous vapor into the grain dust.

"You heard them," Mengze barked at his line. "Spiracles! Three fingers below the ridge seam! Loose on my mark!"

Yunshan did not wait for the volley. He drew the cord-wrapped chitin dagger from his belt. The blade caught the torchlight with the oily, translucent sheen of hardened horn. Keeping low against the sliding drift of spilled barley, he darted along the blind side of the beast's flank, using the fallen cedar timbers for cover.

The creature slammed its bulk down once more, crushing a stone ration trough into powder. The shockwave traveled through the flagstones, numbing Yunshan's shins. As the beast drew in its next shuddering intake of air, the nearest breathing slit flared wide, five paces from where he crouched.

Yunshan lunged forward across the grain. He drove the chitin blade into the pulsing gap between the plates with both hands, throwing his entire weight behind the thrust.

The glass-hard dagger sank clean to its cord-wrapped hilt.

A thick, yellowish ichor spurted across Yunshan's forearms, smoking as it touched the cold air. The Alpha let out a high-pitched, wet whistle that shook the marrow in Yunshan's teeth. The surrounding muscle convulsed, snapping the dagger's grip and hurling Yunshan backward into a heap of barley sacks.

From above, Mengze's archers released their second volley.

Six flaming arrows plunged directly into the ruptured, steaming breathing port. The pitch ignited the pressurized vapor inside the spiracle. A muffled subterranean thump echoed within the creature's ribcage, followed by a gout of black, greasy fire that belched from its breathing vents.

The Alpha went wild. It coiled upon itself, thrashing against the remaining cedar pilings in an agony of burning tissue. The creature's blind bulk slammed into the southern support column, shearing the iron brackets and snapping the cross-braces like dry twigs. Then, unable to draw air through its scorched spiracles, the beast plunged headfirst into the central grain chute, its massive coils dragging tons of barley and fractured stone down into the dark abyss.

The roar of its descent faded down the vertical shaft, swallowed by the subterranean depths.

A heavy silence descended over the Fourth Tier, broken only by the crackle of burning grain bags and the ragged coughing of surviving conscripts.

Mengze descended the hoist ladder three rungs at a time, his boots hitting the flagstones with a dull thud. Han Ba followed close behind, his hand resting on the hilt of his short sword. The captain kicked aside a smoldering barley sack and stopped five paces from Fenglan, his gaze flicking from her soot-streaked face to the nomad sapper covered in yellow ichor.

"You keep strange company for a Granary Mistress," Mengze said dryly, sheathing his dagger. "And you have made an absolute mess of my grain bins."

"At least burning barley smells better than rotting ox blood," Yunshan muttered, wiping yellow slime from his wrists.

"Give it ten minutes," Mengze replied without looking at him. "The smoke will cure the meat."

"The grain bins are the least of your concerns, Captain," Fenglan said. She wiped a smear of grey dust from her cheek, her hands steady despite the tremor running through the floor. "Look at the southern array."

Yunshan got to his feet, shaking barley kernels from his hair, and walked to the edge of the chasm where the Alpha had breached.

The destruction was absolute. Two of the main cedar pilings that bore the weight of the upper four tiers had been sheared cleanly in two, their jagged stumps jutting out into empty air. The foundational limestone footing beneath them had dissolved into piles of fractured gravel.

Beneath their boots, the stone floor of the Fourth Tier had settled at a visible downward angle. A steady trickle of grain was already hissing over the fractured ledge, pouring like liquid gold into an eighty-cubit drop of hollow ruins. The entire mid-section of the High Silo was hanging by a handful of strained iron ties over an empty grave.