The iron rung of the upkeep ladder dug into Arthur’s palm as he dropped into the academy’s abandoned boiler sub-vault. Under his left arm, bundled against his chest inside a stiff work smock, the dying hound weighed no more than an empty knapsack. The animal’s ribs swelled and hitched in rapid, shallow bursts, each breath rattling through its narrow throat pipe like dry gravel shaken in a tin.
The air twenty feet below the kennel foundations was four degrees warmer, thick with coal soot, heavy grease, and the dull, lingering heat of the central steam headers. Decades of heavy lime deposits coated the vaulted brickwork in ghostly white streaks, and water dripped from the ceiling into stale iron drain pits with a slow, hollow rhythm.
Arthur laid the dog down on a pitted zinc workbench in the center of the forgotten work room. The hound’s hind leg dragged limply across the zinc, the swollen ankle joint purple and hot with inflammation. Its single unclouded amber eye watched Arthur’s hands without blinking. There was no defensive growl now, only an exhausted tremor that shook its spine from back of the skull to pelvis.
“Hold on,” Arthur murmured, keeping his voice at a steady, rhythmic murmur. “We have two hours before your heart sac drowns your ventricle. First, we stop the pain.”
He moved with the practiced economy of a surgeon who had logged four thousand hours in metropolitan trauma centers. On Earth, Fang Ran had operated on snow leopards with shattered hip bones, Siberian tigers caught in wire snares, and wolves crippled by illegal poacher traps. The living stonework of mammalian carnivores was burned into his muscle memory down to the tiny cellular layer.
From his work trousers, he retrieved three glass ampoules scavenged from the disposal crates behind the academy medicine room. Low-grade procaine-salts, distilled saline. A vial of steadied ice-cold well tar discarded after an elemental alchemy lecture. In a corner bin beneath a leaking steam pipe rim, he scraped two hundred grams of porous melted rock waste iron sponge and a handful of wild umbral lichen clinging to the damp mortar joints.
He lit a small brass kerosene burner. The blue flame hissed against the damp air. It cast long, wavering shadows against the boiler plates.
Arthur drew five drops of clear procaine solution into his brass needle syringe. His thumb checked the hound’s lower-back spine, finding the space between the fifth and sixth lower-back bones. The needle slipped smoothly through the tough spine cord into the spinal channel. As the fluid entered the space, the hound’s rigid hindquarters relaxed. The violent shivering in its flank ceased within twenty heartbeats.
“Local block complete,” Arthur whispered, resting his fingertips against the dog’s ribs. “Your sense nerves are quiet from the pelvis down, little brother. Now let’s fix your jaw.”
The hound’s lower jaw bone had been jammed laterally, knocked out of its time fossa during an old beating in the drainage pens. For two months, the beast had been unable to grind food, starving on thin slop while its stomach tract withered. Arthur stepped behind the dog’s head, placed both thumbs along the lower premolars. Then he wrapped his fingers beneath the lower edge of the jawbone.
With a firm, downward traction followed by a sharp posterior levering motion, Arthur applied eighteen pounds of force.
A clean, hollow snap echoed off the damp stonework.
The jaw hinge slid back into its joint socket with a dull clack. The hound’s jaw clicked shut cleanly, the blackened upper and lower canines meeting in a natural scissor bite for the first time in months. The dog let out a shuddering, reflex sigh of pressure drop, its dry tongue flicking out to touch Arthur’s thumb.
“Good boy,” Arthur whispered. “Now the chest.”
He took a sixteen-gauge hypodermic needle and attached it to a thirty-drop glass syringe. Palpating the left fifth rib gap just behind the breastbone, Arthur located the spot where the heartbeat hit hardest. The fluid buildup was severe. Every beat was muffled and thready. He angled the needle toward the opposite shoulder and advanced it carefully through the rib muscle.
The plunger pushed back under deep water pressure.
Dark, non-clotting bloody fluid flooded the barrel of the syringe. Arthur drew out fifteen drops of trapped fluid from the heart sac. As the crushing pressure lifted from the heart wall, the hound’s pulse transformed beneath Arthur’s fingers. It jumped from a faint, rapid flutter to a strong, rhythmic thud.
The dog’s clouded amber eye cleared noticeably. A soft, relaxed breath whistled through its nostrils.
A fresh line of amber text flickered across Arthur’s optic field:
Arthur crushed the umbral lichen in an iron mortar, grinding the damp gray moss into the ice-cold tar until the mixture turned a rainbow-bright, oily black. He added the crushed melted rock waste iron dust. Over the kerosene burner, the mid-air began to simmer, venting a sharp aroma of burnt sulfur, damp loam, and cold metal iron.
He pulled his heavy dark metal-blade razor knife from his breast pocket. The metal gleamed coldly beneath the animal fat lamp.
With two swift, decisive strokes, Arthur opened the skin along the lateral aspect of the fractured left thigh bone. The under-skin muscle tissue was pale and blood-starved. But the bone itself was astonishing: beneath the crude stringy callus of the break, the bone-skin didn’t look like mammal bone. It looked like porous, unpolished graphite, its tiny canals pulsing with faint, rhythmic gravity suction.
“Not crushed-star,” Arthur muttered, his fingers working with clean, steady care. “Dormant. Your marrow was trying to pull heavy minerals from your blood. When it found none, your own skeleton starved itself to death.”
He cleared the stringy scar tissue with a bone scoop. He set two salvaged silver-steel pins across the fracture site, realigning the thigh shaft until the outer-brain margins locked together like linked stonework.
He drew the boiling black catalytic broth into a heavy glass beast-doctor hollow tube.
The mixture was thirty-nine degrees—the exact heat threshold shown on the type-list slate. Arthur set the needle against the exposed distal marrow canal and pressed the brass plunger.
The black fluid surged into the spongy bone core.
For three seconds, nothing happened. The boiler room was motionless save for the hiss of the steam pipe and the quiet dripping of water.
Then the hound’s amber eye dilated until the pupil swallowed the iris.
A deep, sub-heard shaking hummed through the zinc slab. The kerosene flame bent horizontally, drawn toward the dog’s pelvis by a sudden vortex of sky thickness. The patchy, mange-eaten gray fur across the hound’s flanks began to singe and smoke. It curled away into fine gray ash that drifted across the table like chimney soot.
Beneath the exposed clean cut, the porous graphite bone turned jet-black. The silver-steel pins groaned under a massive crushing load as the bone margins fused with a row of sharp, violent snaps. Dense jet-black bone webs bridged the gap within seconds. It rebuilt the cortex until the fracture line vanished entirely beneath a smooth, mirror-polished black ridge.
The dog’s ribs swelled by three inches. The chest deep bruise was drawn directly into the blood-vessel stream by the huge osmotic pressure of the newly activated marrow.
A second status slate blossomed in crisp, glowing runes across Arthur’s vision:
Arthur wiped the cold sweat from his forehead with the back of his blood-stained wrist. His own spine twitched with a sympathetic electric current—the first fine-tuning of the soul-sync channel binding his central nervous system to the hound’s core.
The creature on the table was no longer an eighteen-two-pound gutter stray. Its mass had more than doubled, its skeletal frame stretching into long, corded muscles wrapped in dense, midnight-black coat fur that drank the lamplight. Its jaw was broad, deep-set, and heavy by heavy cheekbones that could anchor high-pressure crushing forces.
The hound pushed its forepaws against the zinc slab and sat up.
Its left hind leg bore full weight without a tremor. The animal lowered its massive head, sniffed Arthur’s bloodied fingers, and then, with slow, deliberate pressure, rested its broad black jaw across Arthur’s right knee. A deep, chest-rumbling chuff shook through Arthur’s leg bones—a sound not of domestic obedience, but of a lethal hunting beast acknowledging its pack commander.
“Grimm,” Arthur said softly, his fingers burying into the thick, coarse fur behind the dog’s unclipped right ear. “Your name is Grimm.”
Grimm gave a single, firm nod of his head. His tail swept across the zinc slab with a heavy thud.
Above them, through the iron floor grating, a heavy iron bell began to toll.
Three slow, ear-splitting strikes. The dawn muster bell.
Heavy combat boots thudded against the iron narrow high walkways above the sub-vault. The harsh, amplified voice of an academy court guard echoed down the air-flow shafts:
“All cadets report to the Grand Coliseum for Stage I test. Defaulting debtors report right away to the punishment dock.”
Arthur stood up, picked up his stained smock. Then he wrapped it across Grimm’s back like a rough burlap mantle to hide the freshly molded jet-black coat from premature check. Grimm rose smoothly to his feet, silent as a cast shadow, his molten amber eyes fixed on the rusted iron stairs.
“Let’s go, Grimm,” Arthur said. “Our creditors are waiting.”