The evacuation went first. Octavius organized every villager too old, too young, or too injured to hold a crossbow into a slow column bound for Hollowmere, the nearest fortified town, a full day's walk east along terrain flat enough that the elderly could manage it without breaking down entirely. Remus watched them go from the ruin's outer wall, a thin, straggling line of carts and walking sticks disappearing slowly into the haze, and made himself count them once, carefully, the same way he'd once have counted parts on a shipping manifest: forty-one souls, all told, none of whom would be any use to him in the fight ahead and all of whom he was, quite simply, responsible for keeping alive regardless. That left twenty-eight able-bodied men and women behind, plus Leo, Andrea, and Remus, standing in the vine-choked ruin of a fortress that had clearly failed to hold something once before and would need to do considerably better this time.
The twenty-eight were, on inspection, exactly the mixed, underprepared lot he'd expected: a blacksmith's apprentice who'd never swung anything heavier than a hammer at a person, three farmers who could at least aim a crossbow at a scarecrow with some confidence, a retired soldier old enough to be Octavius's own brother who still moved like the drill had never fully left his knees, and a scattering of shopkeepers, tanners, and one particularly grim-faced baker's wife who informed Remus, unprompted, that she'd buried a husband to Eastland raiders once already and had no intention of burying anyone else if she could help it. He put them all to work clearing rubble and hauling salvage before he'd even finished the fortress's design, on the theory that busy hands worried less than idle ones, and found, watching them, that it was true for him as well as for them.
"First things first," Remus said, standing atop the old keep's collapsing central tower with Andrea beside him, surveying the flat basin below where an army was, by every account, currently marching toward them. "I need to know exactly what I have to work with before I promise anyone I can build something that holds."
He crouched and pressed his palm flat against the ruin's foundation stone.
"Identify."
Item: Fortress Foundation (Ruined)
Materials Available on Site: Stone (extensive), Timber (extensive), Sand (extensive), Salvaged Iron and Steel (moderate, from fallen adventurers' gear)
The salvage alone told its own grim story once he actually walked the ruin's grounds, dozens of abandoned weapons and armor pieces scattered where their owners had fallen to the Basilisk's gaze, some of it fine work, most of it merely serviceable, all of it, now, raw material for something more useful than a memorial.
"This should be enough to raise proper walls," Remus said, sketching quickly as he walked the perimeter, charcoal moving in the same sure, practiced strokes it always did, a rampart here, a narrowed approach road there, a moat drawing off the acid lake that bordered the eastern wall to make any direct assault miserable before the Orcs ever reached striking distance. He touched the finished layout.
"Craft."
Craft: Fortress
Error: Not Enough Material (Stone).
He frowned, checked the design against the tally the System had given him, and found the gap almost immediately: he'd drawn the outer wall two full units thicker than the actual site's stone reserves could support, an old habit reasserting itself, the engineer's reflex to over-build rather than build exactly enough. He revised the sketch down to a single, more efficient course of stone reinforced with salvaged iron banding instead of raw thickness, and touched it again.
Craft: Fortress
Item Created: Fortress!
The whole basin rippled with heat and dust as the design took hold, raised battlements climbing up out of ruin in a matter of minutes where it would have taken masons a full season, the moat filling slow and dark with acid-lake water diverted along a channel he'd carved into the design specifically to make it corrosive to anything that stumbled into it and wasn't Remus's own construction.
"This thing looks impregnable," Andrea said, walking the new wall's length with something close to open admiration.
"There's no such thing," Remus said. "Every wall falls eventually, given enough time and enough bodies thrown at it. What this buys us is time. Three days, if the plan holds and nobody gets unlucky. That has to be enough, because it's what we've got."
"Master Remus," Leo called from below, emerging from the fortress's lower levels covered in pale dust and grinning in a way Remus hadn't seen on him since the moment he'd built the microscope's original theory in his own head, years before he'd had any way to test it. "You need to see this."
He led them down into a half-collapsed basement chamber, the air noticeably colder here than above, thick with the mineral smell of wet stone and something faintly sulphurous underneath it that Remus's nose caught before his eyes did. A seam of pale yellow crystal ran along one wall at roughly chest height, exposed, Leo explained excitedly, by the very act of raising the foundation higher than it had originally stood, the old fortress's own bones shifting just enough to crack open a vein that had probably sat untouched since long before Genesis had a name at all.
Remus pressed his palm to it.
"Identify."
Item: Sulfur Deposit
Quantity: 6 Units. This deposit does not regenerate within any usable timeframe.
Six units. He turned the number over slowly, feeling the particular, specific weight of a resource that had a hard ceiling stamped on it before he'd even used the first grain of it, nothing like the endless stone and timber above. He'd need saltpeter to go with it, and charcoal, the three legs of the same stool his old life had known as gunpowder, and here was where the fortress's other feature turned out to matter: the lower cellars, long sealed off from weather and animals both, were thick with the dry, ancient droppings of generations of cave-roosting bats, nitre-rich earth that Modify could refine the same way it had once refined barrels of horse urine into clean, usable fertiliser back home.
"How much of this nitre earth do we actually have?" he asked, and Leo, still riding the high of his own discovery, hauled up sack after sack from the lower chamber until they'd counted eleven full sacks total, no more hiding anywhere in the walls no matter how thoroughly Leo's own excited digging turned up the rest of the cellar.
"Modify," Remus said, laying his palm across the first sack.
Item Modified: Nitre Earth, Refined Saltpeter!
He worked through all eleven sacks by lantern light, the refinement holding to the same rule Ed's sword had taught him weeks ago: he wasn't inventing the compound from nothing, only helping what was already chemically present arrive faster at a purer version of itself. Combined with the six units of sulfur and charcoal enough from the surrounding timber to matter for nothing, he laid the finished materials out and did the arithmetic in his head the way he'd have sized a batch back on Earth, running the ratio thin enough at the edges to stretch every last usable grain without risking a dud.
"Craft," he said. "Gunpowder Charge."
Item Created: Gunpowder Charge x 40!
Note: Sulfur Deposit exhausted. Saltpeter reserve exhausted. No further Gunpowder Charges can be produced from materials available on this site.
Forty. He said the number out loud, once, quietly, mostly to make himself actually believe it rather than just read it. Forty charges, and no way at all to make a forty-first, not here, not with what the ruin had to give him.
"What in the world is gunpowder?" Andrea asked, watching him weigh the small, dense pouches in his palm with an expression she clearly couldn't place.
"The most dangerous thing I know how to build," Remus said. "And apparently the only forty of it that will ever exist in this fortress. We are going to need to be very careful about when we spend it."
He spent the rest of that day and most of the next drilling the twenty-eight volunteers on the wall's actual defense, walking the line personally rather than simply issuing orders from the tower, correcting a farmer's crossbow grip here, adjusting a shopkeeper's footing there, and it struck him, somewhere in the middle of it, that not one of them had yet asked him why their own commander never once picked up a blade himself to demonstrate anything. He caught the retired soldier watching him work a training dummy purely through the Stone Guardian's borrowed hands, directing every strike from three paces back without ever touching the weapon, and braced himself for the question he'd been quietly dreading since the night Andrea first told him tools couldn't fight.
"Strange way to lead men into a battle," the old soldier said finally, "standing behind the blade instead of holding it."
"It's the only way I've got," Remus said, honest, since there didn't seem to be much use pretending otherwise to a man who'd clearly seen enough real war to spot a lie about it instantly.
"Didn't say it was wrong," the soldier said, and went back to his own line without further comment, though Remus noticed, over the following days, that the man had stopped watching him with quite the same skepticism he'd started with. Whatever they made of a commander who fought entirely through constructs and never once drew steel of his own, it seemed to matter less to them, in the end, than whether the walls held.
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