The cut wolf head hung on the abatis stake until sunrise, its crystal-clear blue horn humming like a dead hornet.
Giles Croft stood on the narrow high walkway with his drafting board balanced on the rail, looking past the frozen trophy toward the northern timberline.
The wind was dead calm. But the air felt heavy, dense with the metal tang of approaching cryo-mana.
Kenneth Drake leaned beside him, his recurve bow unstrung across his back, his fingers tracing the notch of an iron-tipped broadhead.
“They’re gathering at the three-mile line, Lord Giles,” Kenneth said, his voice dropping low. “Maeve says the pack has swollen to five hundred.
Our arrow count is twelve hundred. If each archer lands every shaft with fifty percent lethality, we still have two hundred and fifty wounded beasts hitting the wooden wall.”
“Arrows are single-target moving interceptors,” Giles replied, sharpening his graphite pencil with a pocketknife. “Against swarm-thickness mob pathfinding, single-target projectiles suffer severe throughput bottlenecks.
What we need is an asymmetric area-denial point-defense weapon.”
Kenneth blinked through the freezing mist. “An area-denial weapon?”
“Aimed fragmentation,” Giles said. “A shaped antipersonnel mine. The concept has been standard combat building since the twentieth century.”
Giles unrolled a sheet of drafting thick parchment across the rail, weighting the corners with brass nuts.
Kenneth squinted at the sharp-angled cross-section. “It looks like a curved wooden bread-trough.”
“It’s an explosive speed amplifier,” Giles said. “When an explosive charge detonates unconfined in open air, ninety percent of the striking force dissipates radially in a ball-shaped blast wave.
It makes a tremendous noise, generates a useless crater in the dirt, and throws pellets in random directions. To defeat an armored living charge, you must shape the blast.”
Down in the carpenter’s shop, Giles gathered Master Caleb, Borin Bronze-Lung, and Captain Kroll around the main worktable.
“A curved convex wooden backplate,” Giles explained, pointing with his wooden ruler. “Carved from seasoned two-inch white oak.
Behind the wood, a three-inch tamping block of dense river clay to act as a heavy rush mass. In front of the plate, two and a half pounds of Borin’s sulfur-charcoal propellant.”
Borin leaned over the drawing, his copper-braided beard bristling. He adjusted his sight fire gauge on his belt and squinted at the powder chamber.
“Black powder in an open wooden box?” Borin rumbled. “Giles, black powder generates three crushing deep-sea pressure of explosive spreading pressure in five split seconds.
If you don’t contain it in a bronze cannon barrel, it will blow the back out of the wood and kill the crew standing behind it.”
“Force follows the vector of least physical pushback, Borin,” Giles said calmly. “The dense clay tamping block behind the oak plate weighs twelve pounds.
The projectile load in front weighs only four pounds. Because the rear heavy rush mass is three times heavier than the projectile payload, the spreading blast wave accelerates forward along the level axis.”
Borin’s small, dark eyes widened as he grasped the physics. “The clay holds the back... While the powder spits the face.”
“Exactly,” Giles said. “And to control the scattering angle, we forge a convex wrought-iron deflector dish, curved on a twelve-inch level radius.
Embedded in a layer of rendered beef animal fat across the face of the dish... Eight hundred chilled pig-iron pellets.”
Lady Millicent arrived with her tally-book, peering over Giles’s shoulder.
“The propellant mixture,” Millicent noted, dipping her pen. “Seventy-five parts potassium nitrate, fifteen parts clamp charcoal, ten parts refined sulfur.
Borin’s boys have spent two weeks scraping saltpeter from the old sheep pens. We have fifty pounds of powder in the dry cellar. At two and a half pounds per unit, that allows twenty warheads.”
“Twelve units for the north ditch,” Giles instructed. “Eight in tactical reserve.
A defensive weapon that exhausts its ammunition pool during the first raid wave is an office failure.”
Caleb Thorne-Wood touched the sketch, his sawdust-stained fingers tracing the curved arc. “Eight hundred iron balls? In a single blast?”
“Eight hundred,” Giles confirmed. “When the charge fires, the convex iron dish spreads the pellets outward in a sixty-degree level fan, three feet high and forty yards wide.
It produces a dense, lethal cloud of faster-than-sound shrapnel that sweeps the approach hall clean.”
Captain Kroll ran a calloused finger over the drawing, his breath whistling through his teeth. “By the Throne.
A weapon that sleeps in the dirt until an army walks into its gaze. It’s the art of the old Void-Generals.”
“It’s basic explosive projectiles, Captain,” Giles said dryly. “Now, we need a prototype. Borin, cast the deflector dish. Caleb, carve the backplate.”
Kenneth Drake leaned over the assembly bench, picking up the small brass trigger box. He turned the gearwork in his fingers, testing the release sear with his thumbnail.
“A tripwire release,” Kenneth said. “At Dun-Krag, the tunnel diggers used spring-guns in the countermine saps. But if the wire is too loose, the rats trip it. If it’s too tight, the morning frost snaps the cord.”
“The release sear is tuned to five pounds of tension,” Giles explained. He pointed with a steel metal pen. “A field mouse or a hare lacks the mass to overcome the shear spring. An eight-hundred-pound dire-wolf striking the wire at twenty miles an hour exerts fifty foot-pounds of lateral striking force. The sear trips instantly, driving a spring-loaded steel striker into the copper friction quill.”
“And the friction quill ignites the main powder charge?”
“Right away,” Giles said. “The copper tube contains potassium chlorate and antimony sulfide, sealed with beeswax. Clockwork friction generates a starting flash of two thousand degrees in under two split seconds. No flint spark, no match cord to blow out in the wind.”
* * *
The first prototype fabrication revealed an immediate load-bearing flaw.
Down in the sawpit shed, Caleb shaped the curved oak backplate with an adze, smoothing the inside curve with a compass plane.
Borin forged the convex iron face-plate from a scrap wagon wheel rim. He hammered the curve over a hollow granite anvil.
Toby Karr and Dob carefully packed the animal fat and iron pellets onto the face, sealing the assembly with melted beeswax to keep moisture out of the powder.
Across the top of the wooden faceplate, Giles took a horsehair brush and a pot of black walnut ink, carefully painting four words in bold town block letters:
[FRONT TOWARD MONSTER]
Dob paused with his animal fat ladle. He stared at the painted letters with wide, superstitious eyes.
“Front toward monster,” Dob murmured, touching the rough oak with a trembling fingertip. “A binding decree.
The Lord Master builder has named its purpose. The beast that looks upon that script is looking into its own grave.”
“It’s an orientation indicator, Dob,” Giles said, wiping ink from his thumb. “If a conscript places the mine backward during a night deployment, the backblast will ventilate our own guard post.
The label prevents worker orientation error.”
“Aye,” Dob nodded solemnly, unconvinced. “A sacred binding.”
Then came the static stress test.
Giles placed the prototype into a heavy bench vise to test the crushing force pin on the tripwire release gearwork.
Caleb applied thirty pounds of tension to the trigger lever with an iron torque wrench. Then, a sharp crack split the quiet of the shop.
The oak backplate had snapped straight down the center grain.
Caleb swore, dropping his wrench. “Grain split. The wood couldn’t take the lateral clamp pressure.”
“Outward pulling failure,” Giles noted, inspecting the fractured wood with his magnifying lens. “Seasoned oak has high crushing strength, but low tangential shear pushback.
If the casing split under thirty pounds of clamp tension, the explosive blast wave would have burst the backplate before the pellets cleared the face.”
“Can we cast the whole box out of bronze?” Borin asked, scratching his bald head.
“Too heavy and consumes scarce copper,” Giles said. “We retain the oak, but we forge two half-inch wrought-iron reinforcement hoops around the outer rim.
The iron hoops absorb the hoop stress, keeping the wood under triaxial squeezing. Borin, heat two iron bands. Caleb, cut a fresh oak blank.”
The walk to the old quarry ravine took fifteen minutes through knee-deep snow.
Bram and two High Timber sawyers hauled the twenty pine dark shape targets on a timber sledge. Meanwhile, Borin carried the heavy prototype in a padded leather sling.
Toby Karr walked beside Giles. He carried the target stakes and a bundle of red land-mapper’s pegs.
“The sound signed name in the gorge will be significant,” Giles remarked as they entered the rock cut. “Granite cliff faces have a sound glow multiplier of point nine eight. The sound wave will echo north toward the timberline.”
“Let them hear it,” Kenneth said, unbuckling his bow case. “A pack that hears thunder knows there’s iron waiting behind the wall.”
“A sound signed name is merely tactical tracking data,” Giles said. “What matters is whether the fragmentation pattern matches the sharp-angled math.”
* * *
By late afternoon, the heavy prototype stood ready on the assembly bench.
Two glowing red iron bands were shrunk onto the oak backplate. It hissed wildly as Toby cooled them with cold river water.
The iron tightened as it cooled, locking the split-resistant oak into a dense, rigid capsule.
Inside, two and a half pounds of dry sulfur-charcoal propellant sat tamped behind the clay block, primed with a copper friction quill connected to an eighteen-inch tripwire spring.
The face was packed with eight hundred chilled iron pellets, gleaming dark beneath their beeswax coating.
Sister Teresa arrived at the shop door with a basket of dry animal fat rags. She stopped, staring down at the wooden mine with narrowed eyes.
“You have bound iron and fire inside the heart of an oak box, Lord Giles,” Teresa said softly. “The folk in the bunkhouses are whispering that this weapon drinks the wrath of the earth itself.”
“The weapon converts chemical potential energy into moving projectile speed, Teresa,” Giles replied. He tightened a brass screw on the faceplate. “There’s no spirit entity inside the box. Only physics, metalworking, and basic town pest management.”
Teresa smiled serenely. “Physics is merely the handwriting of the Almighty upon the dust, my lord.”
Giles lifted the twenty-pound device, testing its balance.
“Clockwork strength restored,” Giles said, sliding the brass safety cotter-pin through the release sear. “The hoop reinforcement increases casing burst pressure by three hundred percent.
Now we need hands-on high-speed data.”
Kenneth Drake picked up a coil of copper wire and an entrenching tool. “Where do we test it, my lord?
If this thing explodes with the force of fifty bows, we can’t fire it in the yard.”
“The old quarry ravine,” Giles said, heading for the south gate. “Two hundred yards south, shielded by stone bluffs.
Caleb, bring twenty pine dark shape targets. We’re going to map the scattering pattern.”