It hit her somewhere between sketching hound patrol routes and standardizing the two steam engine designs into one: not a small idea this time, not a clever workaround or a loophole, but something with the specific, vertiginous scale of everything she'd built so far, stacked on top of each other and multiplied.

She sat very still for a long moment, staring at her own notebook without actually seeing it.

"...Oh," she said quietly. "Oh, that's a big one."

She flipped to a fresh page, and this time her hand moved slower than usual, the way it always did when an idea felt too large to sketch carelessly.

"Beelz wants me to actually improve Hell. Not just dig a hole to the surface and call it done, improve life here, for demons specifically. And I've got a lava-powered steam engine design sitting right here, proven, working, needing nothing but heat that literally never runs out." She tapped the sketch. "What if that's not just an elevator. What if that's a whole network."

She started drawing, not a single shaft this time, but branches, multiple angled tunnels radiating outward from Ashfall Reaches like veins, each one leading toward a different point on the surface, each one fitted with its own steam-driven car running on the same lava-heated boiler principle.

"A metro. An actual underground transit system, running entirely on steam, powered by heat that's just, sitting there, forever, free. Every kingdom on the surface currently connects to every other kingdom by crossing the Wastelands, hydras, monsters, days of dangerous travel, the whole reason I even started the wingsuit project in the first place." Her voice was picking up speed now, the idea outrunning her ability to write it down fast enough. "But if Hell sits beneath all four surface kingdoms, which it does, structurally, that's the whole point of it being underground, then Hell isn't just a place people climb up and out of once. It's a hub. A shortcut. Dig enough angled shafts, each one surfacing somewhere different, and Ashfall Reaches becomes the fastest way to get from the Human Kingdom to the Dwarven Republic, or the Elven Kingdom, or anywhere else, without ever setting foot in the Wastelands at all."

She sat back, letting the full shape of it settle in properly.

"...Hell becomes the transport metropolis. Not despite being underground. Because of it."

The implications kept unfolding faster than she could fully track. Demons wouldn't just have easier access to the surface anymore, they'd control the fastest route between every surface kingdom, which meant traffic, which meant trade, which meant every single race that had ever looked down on the Demon Realm as an isolated, forgotten corner of the map would suddenly have an active, practical reason to pass through it constantly.

"This isn't just infrastructure," she murmured, sketching furiously now, angled shaft after angled shaft branching outward from a central station she was already mentally placing somewhere near the throne room itself. "This is leverage. Every kingdom that uses this metro owes something to the demons who built and maintain it. Tolls, maybe. Trade relationships. Actual diplomatic weight, instead of everyone just quietly assuming Hell's the place nobody visits unless they absolutely have to."

She stopped, pen hovering, and let out a short, slightly disbelieving laugh.

"...Beelz asked me to make Hell a better place. I don't think he was expecting 'central transit authority for the entire continent.'"

She didn't stop sketching, though. If anything, the scale of it only sharpened her focus, the same way the boring rig had once turned from "a way to reach the surface" into "the first World First achievement this server had ever produced." She was already blocking out rough distances, angled shaft calculations, station placements near each surface kingdom's capital, steam car scheduling, load capacity per trip.

"Okay," she said, mostly to herself, the workshop around her utterly silent except for the scratch of her stylus. "Okay. New biggest project. Everything else: the pipeline, the conveyor belt, the Republic's elevator, all of that's still happening, but this is the thing that actually answers what Beelz asked me for."

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She glanced up at the small, dark window of her workshop, imagining, just for a moment, four separate tunnel mouths opening simultaneously across four separate kingdoms, all of them leading back down into the same warm, ember-lit hub she'd first stumbled into as a level-one Blacksmith with nothing but a handfull of caltrops and no idea what she was doing.

The actual numbers hit her somewhere around midnight, hunched over a rough continental map she'd borrowed from Nettle's guild hall, ruler in hand, doing the kind of math that made her original tunnel, four kilometers, straight up, one crew, three months, look almost quaint by comparison.

"Okay." She measured the distance across the map again, just to be sure the first measurement hadn't been a mistake. "Left edge to right edge, full continent, that's roughly two thousand kilometers."

She sat back, staring at the scale bar in the corner of the map like it might apologize for what it was telling her.

Then she noticed something, tracing a finger along the rough positions of the four surface kingdoms relative to Ashfall Reaches. "Wait. Hang on. Spokes mean every trip between two surface kingdoms routes all the way down to the hub first, then back up again, even if the two kingdoms happen to sit right next to each other up top. That's not actually the fastest path between them. That's just the fastest path to Hell."

"And if I want an actual loop, not just individual spokes radiating out from Ashfall Reaches, but something that connects all four surface kingdoms to each other through Hell, in a proper circuit instead of everyone routing back through one central hub every single time, that's not four short tunnels anymore. That's a ring. A ring with a diameter somewhere around fifteen to eighteen hundred kilometers, just to actually touch all four capitals along its circumference."

She did the circumference math next, mostly out of morbid curiosity, and immediately regretted it.

"...That's four to five and a half thousand kilometers of tunnel, if I'm building the full loop instead of individual point-to-point shafts." She set the ruler down slowly, staring at the map with an expression somewhere between awe and genuine, dawning horror. "My original tunnel was four kilometers. This is a thousand times bigger. At minimum."

The silence that followed lasted long enough that she actually considered, for one brief, uncharacteristic moment, whether this was simply too large a thing to attempt.

Then, predictably, the moment passed.

"Okay. Okay, no. Not solo. Obviously not solo, that was never realistic even for the original tunnel, I had a whole crew for four kilometers. This needs. " she started listing, ticking items off against her fingers ": actual excavation crews, multiple boring rigs running simultaneously instead of just my one prototype, proper engineering oversight so five thousand kilometers of tunnel doesn't just collapse on itself somewhere out of sight where nobody's watching."

She grabbed a fresh page, already restructuring the entire project from "thing I build" into "thing I coordinate."

"Beelz has the manpower, demons, obviously, this is their realm, their infrastructure, ultimately their benefit. But raw manpower isn't enough on its own. I need people who actually understand large-scale excavation at a level beyond 'four people cranking a wheel,' and I already know exactly who that is."

She was writing before she'd even fully finished the thought.

Dwarven Republic, mining expertise, existing excavation infrastructure, actual professional tunneling experience I completely lack beyond one lucky prototype.

"I need the dwarves. Not as customers this time, as actual partners. Proper engineering crews, not just Gorthruk's forge and a council I keep talking into things." She tapped the page, already sketching a rough trade framework. "And they're not going to commit thousands of kilometers of skilled labor for free, especially not on a project this size. I need something worth their while. Something bigger than gold."

Her eyes drifted, almost on reflex, toward the small, hard-won stockpile of adamantium chunks still sitting in the corner of her workshop, the same compensation vein the developers themselves had left her, months ago, still nowhere near fully mined out.

"...Mining rights," she said slowly, the shape of the deal falling into place. "Not a cut of gold. Not a flat payment. Access to the vein itself. Let the Republic's own crews mine adamantium directly, ongoing, in exchange for their expertise and manpower on the tunnel network. They get a material nobody else in this entire game has ever had reliable access to. I get an actual engineering partner capable of handling a project this size without it collapsing on me, literally or otherwise."

She sat back, surveying the sprawling mess of numbers, trade proposals, and continental-scale tunnel diagrams now covering nearly every surface of her workbench, and let out a long, slightly stunned breath.

"...This just went from 'help Beelz make Hell nicer' to 'negotiate a multi-kingdom infrastructure treaty,' didn't it."

She sat with that for a moment. Then, because it was still her, because backing down from scale had never once actually been part of her toolkit, she grinned, grabbed a fresh page, and started drafting the pitch she'd need to bring to Gorthruk.

"...Okay. Let's go be ambitious about this properly."

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