I BUILT THE LAST SANCTUARY

Chapter 7: Structural Stress

Chapter 7: Structural Stress

The dust from the mortar hit settled in a thick, choking veil that tasted of pulverized concrete and ancient disappointment. Adrian spat into the grit, his ears ringing with a high-pitched whine that wouldn't quit.

“System,” Adrian croaked, his voice barely audible over the hum in his head. “Tell me the dome didn’t just turn into a convertible.”

[ System: Wall Section 4B is currently classified as ‘Optimistically Porous.’ Structural Integrity: 2.8%. ]

“Great. Two percent. I’ve seen gingerbread houses with better stats,” Adrian muttered. He looked over at Seraphina, who was dusting off her shoulder with a grimace. “You okay? You’re not leaking green juice, are you?”

“Just regular blood this time, thanks for asking,” Seraphina said, testing her weight on her leg. “That bluff of yours? Knox didn’t buy it. He just sampled the appetizer.”

“It wasn't a bluff, it was a creative interpretation of future events!” Adrian snapped, gesturing to the smoldering gap. “We need to stabilize the core supports now, or the next shell is going to drop the ceiling into the basement. Seraphina, grab the heavy welding rig.”

“The heavy one? In those narrow maintenance shafts?” she asked, looking toward the small, circular hatch near the power grid. “We’ll barely fit in there together.”

“It’s either tight quarters or a long walk through the vacuum of space when the atmosphere seal snaps,” Adrian said, already prying the hatch open. “Pick one.”

The service tunnel was a humid, lightless gullet that smelled of hot copper and damp earth. Adrian slid in first, his back scraping against the ceiling tiles as he dragged the bulky, humming welder behind him.

“Watch the cables,” Seraphina hissed, sliding in after him. Her boots were inches from his face as they maneuvered into the cramped nexus of the support beams. “It’s a furnace in here, Adrian. How long does the System say we have?”

“Until the temperature fuses melt or Knox gets bored. Whichever comes first,” Adrian grunted. He flipped his welding mask down, the interior glow casting blue lines across his sweat-streaked face. “Hold that bypass valve steady. If it jitters while I’m fusing the plate, we’ll trigger a feedback loop.”

“I’ve got it,” she said, her voice dropping as she braced herself against the bulkhead to create leverage. “Just hurry up. My gear is starting to cook.”

“Believe me, I’m not exactly enjoying the ambiance,” Adrian said, the sparks from his torch showering the narrow space in erratic bursts of orange. “You’re surprisingly strong for someone who looks like they live on nutrient paste.”

“It’s called functional muscle, Architect. You should try it sometime,” Seraphina countered, her breath hitching as she strained to hold the valve in place. “Is the plate set?”

“Almost. Just… one… more… bead,” Adrian muttered. He killed the torch, and the tunnel plunged into a heavy, oppressive orange gloom from the cooling metal. “There. Foundation shored. For now.”

He pushed the mask up. In the near-darkness, his face was inches from hers. The only sound was their synchronized, heavy breathing and the rhythmic ticking of the cooling pipes.

“Nice work,” she whispered, her eyes tracking the faint holographic flickers on his sleeve. “You actually look like you know what you’re doing.”

“It’s just logic and thermal expansion,” Adrian said, though he didn't move back. “People are simple. Math is simpler. You combine them, and stuff stays upright.”

“Except when it tries to eat you,” Seraphina noted, tilting her head toward the metal wall behind them. “Did you hear that?”

Adrian froze. “Hear what?”

Scritch. Scritch-skrrrrt.

“Sounds like a dry-waller with a grudge,” Adrian whispered.

[ Alert: Seismic sensors detecting irregular movement in Sub-Level 3. Identification: Tunnel-Boring Mutants (Hive Class). ]

“Oh, you’ve got to be kidding me,” Adrian groaned, tapping his temple. “System, tell me they’re friendly. Tell me they just want to borrow some sugar.”

[ System: Aggression: 99%. They are attracted to the vibrations of your welding. Pro-tip: Stop vibrating. ]

“A bit late for that!” Adrian yelled as a section of the tunnel floor five feet away buckled upward. A long, segmented mandible tipped with black ichor burst through the plating.

“Adrian, back up! Back up now!” Seraphina shouted, kicking at the hatch they had entered through.

“I can't! The welder is wedged!” Adrian scrambled back, his boots slipping on the slick metal. “If they get into the core supports, they’ll chew through the main conduits! The whole dome will go dark!”

“Then kill them!”

“With what? My slide rule?” Adrian looked around wildly. His eyes landed on the primary coolant line running overhead. “System, what’s the internal pressure of that nitrogen loop?”

[ System: 4,000 PSI. Temperature: -190 Celsius. Warning: Manual breach is ill-advised. ]

“It’s a great advice that I’m going to ignore!” Adrian grabbed the manual wrench. “Seraphina, get behind the lead shield! When I crack this, it’s going to get very cold, very fast!”

“You’re going to freeze the entire sub-sector!” she yelled, diving into the recess of the support column.

“Better frozen than eaten!” Adrian roared, swinging the wrench with every ounce of frustration Knox had given him over the last hour.

The valve hissed, then screamed. A cloud of liquid nitrogen erupted into the tunnel like a physical fist. The skittering sounds outside the shaft shifted into frantic, clicking screeches as the cold-blooded insects found their joints instantly locking in the sub-zero mist.

Adrian scrambled behind the shield next to Seraphina, his teeth chattering instantly. “S-s-system… status?”

[ System: Hostile bio-signatures neutralized (Frozen). Tunnel integrity maintained. Suggestion: Buy a jacket. ]

“G-g-great,” Adrian panted, his breath coming out in thick, white plumes. “At least the… the bugs are on ice.”

“You’re a lunatic,” Seraphina said, though she was shivering so hard she could barely form the words. “You nearly turned us into popsicles.”

“But we’re… we’re upright popsicles,” Adrian said, trying to force a grin.

A loud, static-filled crackle erupted from the radio on his belt. It was Grimm, and he sounded like he was running through a minefield.

“Adrian! You there? Stop playing in the basement! We’ve got trouble!”

“Grimm?” Adrian grabbed the radio. “We’re a bit busy being frozen. What’s the status up there?”

“Forget the walls, boy! Knox isn’t waiting for his thirty minutes! He’s just launched the scouts to draw our fire!”

“Wait, already?” Adrian stood up, ignoring the way his joints creaked.

“And that’s not the worst part!” Grimm’s voice hit a fever pitch. “Your blue ghost screen is going crazy up here! It’s turned a deep shade of ‘We’re Screwed’!”

Adrian checked his interface. The HUD was flashing a violent, rhythmic magenta.

[ Warning: Settlement Heat Score has reached: LEVEL 3. ]

[ Trigger: The First Wave. Status: ARRIVING. ]

“What does Level 3 mean, System?” Adrian demanded, his heart sinking.

[ System: It means the environment is no longer testing you. It is attempting to delete you. ]

“Adrian!” Seraphina pointed to the monitor she’d pulled up on her wrist. “Look at the gate!”

Through the frozen haze of the tunnel, Adrian saw the camera feed. The horizon wasn't just dust anymore. It was a solid, moving line of steel and mutant bone, stretching as far as the lens could see.

“Knox isn't just attacking,” Adrian whispered, his architect’s mind already seeing the fatal load on their defenses. “He’s clearing the table.”

“Boss!” Grimm’s voice screamed over the comms. “The gates are buckling! They aren't using rams—they’re using explosives! We have thirty seconds before the front door is a suggestion!”

Adrian gripped his wrench until his knuckles turned white. “System… put all remaining power into the perimeter floor-shifters. If we can't keep them out, we're going to make sure they can't find their way in.”

[ Warning: Power is currently at 4%. If you do this, you will have no lights, no comms, and no life-support in the med-bay. ]

Adrian looked at Seraphina. She looked back, her face hard and ready.

“Do it,” Adrian commanded. “Let’s show them how we renovate in Sector 7.”