The forge hummed and rumbled.

  A deep vibration rolled through Emberleaf’s Great Forge like a heartbeat, the clang of hammers its pulse, the hiss of bellows its breath.

  Heat shimmered through the rafters where containment runes crawled like fireflies, while molten mana glowed beneath the floor grates in steady orange veins.

  Kael stood at a reinforced iron table in the center ring, a soot-stained sketch spread flat beneath his gloved hand.

  The design wasn’t a sword.

  It was something stranger: a compact iron frame etched for stability, a rune-barrel spiraled to tame raw force, and a chamber meant to drink mana crystals and spit them back as bolts. A crude trigger path of glyphs ran along the side like veins, as though it were a body waiting to be given blood.

  A magical gun, Kael thought. The kind of thing that shouldn’t exist here. The kind of thing that could hand fire to hands that were never meant to hold it.

  “Looks like a fire-wand that stubbed its toe,” said a gravelly voice at his shoulder.

  Marrun Emberpick leaned in, thick goggles reflecting the sketch. He wasn’t Emberleaf-born—Kael had invited him from Runebrick Hold, a dwarven forge-city known for producing weapons that outlived their wielders.

  Marrun was stocky, broad-shouldered, his gloves scorched, and one edge of his beard permanently singed from too many experiments gone wrong.

  He lacked the grace of a palace artisan, but his work had a different kind of beauty: it never failed.

  “Sturdy bones,” Marrun said at last, running a callused thumb along the sketched barrel. “But this design’s half theory and half hope.”

  “I am not hope,” Rimuru declared, springing onto the table and plopping down a puddle of gel beside the firing mechanism. “I am science. Slime science. You’ll thank me when this doesn’t break your shoulder.”

  Kael smirked faintly, his eyes locked on the charcoal lines. he thought,

  Nanari leaned against a nearby support pillar, arms crossed, smirk tugging at her mouth. Her sleeves were rolled up from morning drills, soot streaking her cheek like warpaint.

  “You’re planning to hand this to farmers and goblins?” Nanari asked, arms crossed. “Then you’d better make it foolproof. Otherwise, your grand invention’s just going to explode in somebody’s face.”

  Kael kept his eyes fixed on the etched chamber and the crude crystal slots. To him, this was the great equalizer. While the high-born and the gifted hoarded their secrets, this device would place that same authority into every common hand. It would finally pull the world onto level ground.

  Aloud, he said, “If we make weapons only the gifted can wield, then we lose every battle we never get to fight.”

  Rimuru perked up immediately, oozing onto the edge of the table. “And when it does explode, I call dibs on licking the pieces.”

  Marrun snorted, adjusting the strap of his singed apron. “Aye, but you’ll need more than lofty speeches to keep goblins’ hands attached. Core chamber’s too raw. Crystals’ll buck like a mule if you don’t brace them with dusksteel.”

  Kael finally lifted his eyes, meeting the dwarf’s through the glow of the forge. “Can you stabilize it?”

  Marrun grinned, teeth flashing beneath the soot. “Lad, if it can be broken, I can build it to last. But don’t mistake durability for elegance. This thing’ll be ugly.”

  “Ugly’s fine,” Kael said. His gaze flicked back to the sketch, the runes etched like veins. “Ugly still kills.”

  

  Kael’s jaw tightened. Five wasn’t enough. But it was a start.

  Marrun’s knuckles struck the table with the heavy, rhythmic crack of a hammer on stone. “Then let’s see if the bones of this beast can hold.”

  Around them, the forge shifted. Dwarves tightened their gloves. Goblins scrambled up ladders with ore buckets balanced on their backs. A demi-human smith muttered a chant to keep the bellows rhythm steady, each gust feeding fire into the runed grates below.

  Rimuru puffed herself up and declared, “This is history, by the way. First magical boomstick ever. Somebody write that down.”

  Kael allowed himself a brief smile before pulling the sketch closer. History, he thought. Or a mistake they’ll curse my name for.

  Kael tapped the crystal chamber sketched on the page. “We start here,” he said. “Fire core first. If the runes hold for that, the rest can follow.”

  Marrun grunted. “Fire’s the simplest. If it can’t handle that, it’s nothing but scrap.” He gestured for a goblin apprentice to bring the ore. “We’ll forge the frame in dusksteel. Lighter than pure iron, tougher than steel. Might keep the barrel from splitting when it screams.”

  The forge roared as the apprentices fed the crucibles, molten light spilling across the grates like living veins. Kael rolled up his sleeves and gripped the tongs himself, lowering the first ingot into the heart of the flame.

  I wonder if America would be proud, he thought wryly, watching sparks leap from the molten metal. The first magical gun. A weapon built not for kings or Scourges—but for anyone willing to lift it

  The heat hit him like a wall, sweat already beading on his brow as the ingot sank into white flame. The metal howled as it softened, edges bleeding into liquid fire.

  Marrun barked instructions, his voice steady over the roar. “Slow rotation. Keep the slag moving or the runes won’t bite.”

  Kael obeyed, muscles straining as he turned the tongs. The molten glow reflected in his eyes, bright enough that he saw not just steel—he saw possibility.

  Farmers standing shoulder to shoulder with soldiers. Goblins gripping more than spears. A weapon that didn’t ask for pedigree, only resolve.

  Rimuru perched on the table, humming like a kettle, tendrils waving dramatically. “History’s happening right now. Do you think we should sign it? ‘Made by Kael and Rimuru, patent pending.’”

  Kael smirked faintly, not looking up. “If it explodes, you can take the credit.”

  “Deal.”

  The forge roared higher, and the first sparks of the Runegun’s birth spat upward, searing the air like a promise.

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  The molten ingot hissed as it sank deeper into the forge, heat bending the air until the runes along the crucible pulsed red. Marrun barked an order, and two apprentices swung the bellows in rhythm, feeding the flame until it roared like a beast straining against its chains.

  Kael kept his grip steady on the tongs, shoulders tight with the weight of it. This wasn’t like holding Blazebinder, where the weapon whispered back. This was raw, silent, waiting to be given a voice.

  

  Kael’s jaw tightened. “We’ve got about twenty seconds before the forge destabilizes,” he said, already moving. “If the rune doesn’t go in clean, the whole thing collapses.”

  Rimuru floated closer, her glow flickering orange in the heat. “Then don’t miss.”

  Marrun slammed a heavy chisel onto the anvil, sparks showering his beard as he shouted over the roar of the flame. “Rune groove first! If you etch after tempering, the damn barrel will cry apart the first time it sees a crystal.”

  Kael nodded, already moving. He pressed the half-shaped metal against the glowing rune plate, dragging it in slow, steady arcs. The grooves drank in heat, carving spirals that would later guide mana like rails for lightning.

  He could almost picture it—the shot igniting, surging through the lines, flying true instead of wild. A weapon that didn’t care about bloodlines. All it required was aim. All it needed was will.

  Rimuru bobbed smugly near his elbow. “You’re basically making angry plumbing.”

  Kael exhaled through his nose. “Plumbing that bites back.”

  By the time the barrel cooled to a dull red, Marrun was already inspecting it with a smith’s suspicion. He held it up to the forge light, squinting through his soot-smeared goggles. “Grooves are clean. Lines are true. Not bad for a boy who thinks fire listens to feelings.”

  Kael flexed his raw hands, the ache settling deep into his knuckles. “Feelings forged this city. Let’s see if they can forge a weapon.”

  Marrun snorted, but there was the faintest glint of approval in his eyes. “We’ll see. Load the chamber next. If it can hold a crystal without whining, we’re halfway to not dying.”

  Kael wiped the sweat from his brow and reached for the first fire crystal—small, pulsing like a heartbeat in stone.

  For a second, he just held it, feeling the heat against his palm. This was it. The piece that would decide whether the Runegun was a dream… or a death sentence.

  He slid the crystal carefully into the chamber. The etched runes along the barrel flickered faintly, catching the glow, then steadied into a dim pulse. There was no sparks or cracks.

  Rimuru leaned so close her slime almost touched the frame. “It’s humming. That’s either good… or really, really bad.”

  Marrun bent closer too, beard nearly brushing the barrel. “Humming’s fine. Screaming’s the problem.”

  Kael let out the breath he’d been holding. For the first time since sketching the design, the Runegun didn’t feel like theory. It felt real. Alive.

  Kael lifted it, testing the weight. It wasn’t elegant—closer to a musket’s bulk than a wand’s grace—but it balanced better than he’d expected. Heavy enough to anchor, light enough to swing.

  He aimed at the far dummy across the forge yard, the one Marrun had reinforced with plates of dusksteel just in case.

  His thumb brushed the rune-trigger. The etched glyphs lit faint red, heat curling faintly through the frame.

  Rimuru whispered, “Moment of truth. Please don’t explode.”

  The runes along the barrel flared. A coil of fire twisted tight, then released with a thundercrack.

  The shot streaked forward like a condensed flame-bolt, smashing into the dummy’s chest. The steel plate dented, smoking as sparks scattered across the floor. The recoil shoved Kael’s arm back, but not enough to throw him off balance.

  For a heartbeat, the forge fell silent. Then goblins cheered, hammering anvils with their tools. Marrun just crossed his arms, grunting. “It spits fire. That’s a start.”

  The Runegun hissed in Kael’s grip, heat surging into the casing. A back crystal cracked with a sharp pop, spitting a tongue of flame sideways across the testing yard.

  Kael cursed under his breath and dropped the weapon before it burned through his glove. Rimuru dove instantly, slurping the Runegun into her slime form like a protective bubble. She burbled for a moment, then spat it back onto the dirt with a hiss of steam.

  “Okay,” she said flatly, goo dripping. “Mark One needs a serious timeout.”

  They ran four more trials before the sun dipped low.

  Mark Two fired clean, but the recoil shattered the grip straight out of the stock.

  Mark Three refused to fire at all—until Rimuru poked it, which nearly lit a training tent on fire.

  Mark Four detonated backward into the chamber, sending Marrun swearing about “goblin finger removers” loud enough for half the forge to hear.

  But then came Mark Five.

  Mark Five was different.

  Kael had Marrun rework the barrel with new stabilizing runes, reinforced by dusksteel strips hammered so thin they gleamed like veins.

  Rimuru infused the core slots with a balanced gel that hummed faintly when it stabilized, and the goblin apprentices etched the spiral runes tighter along the barrel to force the mana into a bullet-line instead of a flare.

  When Kael lifted it, the weight felt right. It felt rugged and functional. It was balanced—the kind of tool meant for use rather than worship. He loaded a single fire crystal, snapped the chamber shut, and leveled the weapon at the scorched dummy across the range.

  Mana trickled through the etched grooves, glowing faintly as it built. Kael steadied his stance, exhaled, and pulled the trigger.

  The rune-barrel lit, and a bolt of flame screamed across the field. It struck the dummy square in the chest—no wild flare, no backfire, no explosion—just a clean shot that left the wood smoldering.

  For a heartbeat, no one spoke.

  Then Marrun let out a low whistle. “Straight as a hammer’s arc.”

  Rimuru bounced twice, her gel rippling in excitement. “We just made history! Also, I demand naming rights. I vote for Boomstick Junior.”

  Kael lowered the weapon, heat still buzzing in his palms. His lips curved faintly. “No. This one already has a name.”

  He turned the frame in his hands so the runes caught the forge-light, the spirals still glowing faintly from the shot.

  “Runegun,” Kael said at last. The word felt heavy, final—like it belonged here. “A weapon not for crowns or Scourges. For everyone else.”

  Marrun grunted his approval.

  Rimuru made a disappointed squelch. “Fine. But I’m still calling it Boomstick Junior in private.”

  The forge quieted after the last trial, only the crackle of coals and the hiss of cooling metal breaking the air.

  Apprentices filed out with tired grins, some still whispering about the blast that had nearly knocked a target wall flat.

  Kael stayed behind, the Runegun resting across his knees as he sat on a low stone bench. It wasn’t elegant yet. It wasn’t safe yet. But it was real—iron, rune, and fire bound together into something that could change who held power tomorrow.

  

  Kael looked down at the weapon. For the first time, he felt like he wasn’t holding just a tool. He was holding a choice.

  Rimuru floated into view, helmet still tilted sideways from the tests. She squished down beside him and gave the Runegun a cautious poke.

  “So,” she said, her voice smug but quieter than usual, “we just made history… or we just made the world’s most dramatic paperweight.”

  Kael exhaled through his nose, half a smile tugging at his mouth. “If it’s both, I’ll take it.”

  Rimuru tilted, puzzled. “That’s very human of you.”

  He didn’t correct her. He only tightened his grip on the weapon, the weight of it heavier than metal.

  The forge quieted around them, the last embers dimming as workers packed away tools and banked fires.

  Marrun barked a few final orders to his apprentices before stomping off toward the side halls, muttering something about “redesigning the damned rune grooves.”

  Kael stayed where he was, seated on the overlook with the Runegun across his lap.

  Below, Emberleaf pulsed with its usual life—lanterns glowing, laughter echoing faintly from the square, Nyaro pacing the shadows like a watchful flame-eyed sentinel.

  For the first time that day, Kael let the tension ease from his shoulders. The Runegun wasn’t perfect. But it was real. And that was enough.

  Rimuru floated up beside him, still wearing her miniature helmet at a jaunty angle. “So,” she said, tilting toward the Runegun, “do we celebrate because it works… or mourn because you just invented something that’s going to make nobles lose their collective minds?”

  Kael chuckled under his breath. “Maybe both.” He turned the weapon slightly, watching the runes flicker faintly in the dusk. “It’s not just a tool. It’s a choice. And choices scare them more than fire ever will.”

  Marrun stomped over, still wiping soot from his gloves. “Careful, lad. You’ve taken the first step toward changing how wars are fought. Once this thing leaves Emberleaf, you won’t be able to shove it back in the forge.”

  Kael met Marrun’s steady gaze and nodded. “Then the first hands to hold it will be ours.” He slung the Runegun across his back, the weight strange but certain. “If the world chooses to fear it, let them. We’ll build with it first.”

  Rimuru bobbed at his shoulder, humming smugly. “So it’s official? Our little forge-baby’s first name day?”

  “It’s not a child, Rimuru,” Kael said, lips twitching into the faintest smile. “It’s a weapon.”

  “Funny,” she replied. “Feels like both.”

  Kael turned the Runegun once more, letting the rune-carved barrel catch the forge light. The glyphs pulsed faintly against his palm—not alive, not like Blazebinder, but present. Intentional.

  “This changes everything,” he thought. “Not just for me. For all of them.”