The shadow belonged only to an evening delivery mule, its pack frame empty, drifting past the doorway in search of stray mash. Cui Heng let out a shuddering sigh, his fingers unknotting from his stained burlap apron. "Don't stand there gaping at a pack beast," Su Linyin whispered, her sleeves rustling as she pulled the door shut and slid the iron bolt home. She set a bare training blade of plain folded iron onto the workbench. "Help me steady the vise. A batch like this doesn't wait for your nerves to settle. The primal vitality in the pigment will curdle into sludge within an hour if it is not anchored to steel." Cui Heng clamped both hands onto the wooden screw, turning until the vise creaked and held the practice blade rigid. "Linyin, please. Hide the vial. If Overseer Yaoquan returns with the inner compound bailiffs, they'll say I stole sect cinnabar. They'll whip the skin off my back and throw me down the gorge." "Overseer Yaoquan currently lacks both eyebrows and trousers, and is presently sprinting toward the river infirmary," Su Linyin countered smoothly. She dipped the tip of a slender wolf-hair brush into the obsidian fluid. The ink clung to the bristles like liquid night, utterly absent of the harsh, throat-scorching reek common to Crimson Venom. Instead, it smelled faintly of wet slate and high cliff rain. "Besides, you didn't steal anything. He ordered you to tend the ninth boiler. The boiler produced this. By the craft-laws carved above the main sluice gate, the stirrer holds salvage rights to any uncataloged sediment." "The craft-laws were written by men who died four centuries ago," Cui Heng muttered, keeping his head down. "Living elders have much heavier sticks." *He lacks all backbone,* a voice drawled directly behind Cui Heng's ear. Baozong was curled atop an inverted resin tub, washing one rust-colored paw with meticulous, rhythmic swipes of his pink tongue. *A toad has more ambition. A toad at least puffs its belly when an ox steps near. You, boy, would apologize to the hoof for bruising it.* "I just want to survive my apprenticeship," Cui Heng muttered back under his breath. *Quiet. The woman is actually doing something respectable for once.* Su Linyin breathed out, steadying her wrist. The wolf-hair tip touched the cold steel. Where ordinary resin-washes sizzled and bit into the metal with corrosive smoke, this dark glaze sank into the grain as smoothly as water soaking into parched silk. She traced the three strokes of the River-Calming Glyph down the fuller. The black pigment flared with an inner sheen of silver, the room cooling by several degrees as the air answered the stroke. Resonance hummed through the iron—clean, sharp, without the jagged, toxic vibration that usually sickened anyone standing within five paces of freshly finished steel. She lifted the brush, her hand trembling slightly from the strain. "Look at it. A standard practice saber, yet the glaze alone elevates it to the third tier of Mystic-Grade. Cui Heng, do you understand what this means? You are no longer a mere laborer. If we bring this to the Pavilion of Inscriptions, they will grant you a junior artisan's sash. You can leave the boilers forever." "No," Cui Heng said immediately, backing away from the bench until his shoulder hit the damp brick wall. "No sashes. No Pavilion. If they notice me, they’ll ask how I survived the fume flux. Then they’ll inspect my hands, they’ll inspect my station, and then they'll find..." He glanced down at Baozong. *They will find a magnificent divine beast who will gladly curse their ancestors with boils,* Baozong grunted, though his whiskers twitched with annoyance. Then the river-cat stopped mid-groom. His ears flattened entirely against his skull, the copper-colored scales along his spine bristling into sharp, rigid plates. "Baozong?" Cui Heng asked, his voice dropping. *The air,* the cat hissed into his mind, the grumpy tone vanishing beneath an ancient, predatory disgust. *Do you smell it, boy? Sniff the drafts coming through the stone flues.* Cui Heng inhaled cautiously through his nose. Beneath the vinegar smell of drying tree-sap and the sulfur of the cooling furnaces, a sickening sweetness lingered—like pond weeds rotting beneath thick ice, mingled with the heavy, iron tang of slaughterhouse runoff. "I smell it too," Su Linyin said, her gaze darting toward the floor grating where the drain flues emptied into the gorge's lower channels. She wiped her brush clean with a scrap of oiled silk. "For the past three fortnights, the muster rolls in the lower tier yards have been thinning. At first I thought disciples were fleeing down-mountain to escape the work quotas. But the third-tier stirrers... seven vanished from the yellow-pitch yards last week. Five more from the copper vats two nights ago." "They probably ran," Cui Heng whispered hopefully. "The work destroys your lungs. Anyone with half their wits runs if they can climb the perimeter wall." *Nobody slips through three ward-barriers and four packs of tracking hounds on half-melted feet,* Baozong growled, leaping down from the tub with a soft thud. *That sweetness is stale marrow. Someone is rendering cultivators. Cheap ones, but cultivators nonetheless. The vermin elders of this heap are cooking forbidden muck, and weeds are not what they put in the pot.* Su Linyin looked between Cui Heng and the cat, who was now pacing near the small service grate at the back of the chamber. "The upper ledgers are kept in the Eastern Scriptoria. The muster records never lie; even if people disappear, the storehouse accounts must balance the ounces of spiritual matter against the barrels produced. If we can reach the records before the midnight watch shifts, we can see where those names were transferred." "Break into the Scriptoria?" Cui Heng’s stomach twisted into knots. "That’s an execution offense. They feed trespassers to the furnace turtles!" *Then do not get caught, spineless one,* Baozong said, nudging Cui Heng’s ankle with a scale-sheathed flank that felt like cold river stone. *Besides, if you stay here like a fat carp waiting for the net, you will be in the boiling pot by week's end anyway. Move your feet. I smell old parchment and dried rat meat up the flue. Lead on, or I will make your left sandal unbind every ten steps for a month.* Cui Heng swallowed hard, but the cold finality in the beast's mind left no room for retreat. Cautiously, guided by Su Linyin's knowledge of the compound's shadow corridors, they wound their way along the stepped shelves of the waterfall cliff, avoiding the glow of the elder lanterns. The Eastern Scriptoria sat wedged between two massive aqueducts, its timber lattice slick with perpetual spray. The outer door was secured by a heavy copper padlock shaped like a coiled viper. Su Linyin reached for a hairpin, but Baozong merely sauntered forward, brushed his tail across the keyhole, and sneezed. A sharp *clack* echoed as the interior tumblers sheared clean off, dropping the lock open onto the mossy threshold. Cui Heng pushed the door inward, wincing at every dry scrape of wood on stone. Inside, rows of cedar shelves reached into the gloom, heavy with thousands of bound bamboo scrolls and ledger sheets stiffened with beeswax. The air was thick with the dust of ground mineral pigments. Su Linyin moved swiftly down the central aisle, running her fingers along the cedar tags marked with seasonal dates. "Here. Month of the Frost Descent. Requisitions for the Grand Craft Festival." She slid a thick, scarlet-sealed roll from its cradle and unrolled it across an angled reading desk. Cui Heng held a hooded candle close, keeping the flame low. The brushwork on the scroll was not the upright, balanced script taught to the outer students. It was written in jagged, needle-thin strokes of dark brownish-red ink. Column after column detailed the distribution of supplies: *Nine hundred catties of bone-ash. Forty jars of mountain cinnabar.* And beneath them, listed not as names, but as measures of volume: *Vat-Stirrers, Fourth Rank: Eighty-four units. Third Rank: One hundred twelve units.* "Units?" Cui Heng muttered, his brow furrowing as he leaned closer. "Why are the apprentices written as units?" Su Linyin's fingers tightened on the edge of the parchment, her knuckles bleaching white against the wood. "They are not transferring workers to the festival grounds. Look at the formula header. 'The Dragon-Vein Crimson Glaze. To be steeped during the midnight eclipse, utilizing the resonant vitality of two hundred living vessels whose meridians are already saturated with toxic base-varnish.'" She looked up, her voice nearly breaking in the dim light. "They let the apprentices absorb the poison through their bare skin for years on purpose. It tempers the blood. They aren't going to let anyone open a workshop, Cui Heng. They are boiling the entire lower yard to paint the Grand Elder's festival halberd." Cui Heng stood rigid, the cedar smell suddenly replaced in his throat by the phantom taste of the very glazes he had stirred since childhood. Every blister, every yellow chemical burn on his forearms—none of it had been an accident of neglect. It had been preparation. *Disgusting,* Baozong spat, his tail thrashing. *Lazy butchers. Real ink requires patience, not butcher-tricks. We leave. We find the fat Overseer and we—* A heavy wind battered the exterior lattice, extinguishing the hooded candle in a sudden downdraft. Outside the window, a pale shape eclipsed the waterfall spray. A massive white crane, its feathers as sharp as iron needles and its eyes glowing with the cruel, milky light of an Elder's tracking enchantment, slammed its talons onto the cedar sill. Its long beak parted, and a shrill, piercing shriek tore through the silence of the archive, setting the bronze warning bells across the gorge-side sect clanging into the night.

The Brush-Wielder's Secret