LOCATION: DROWNED DAR ES SALAAM (ROOFTOP VANTAGE).
ENEMY NUMBERS: ESTIMATED 5,000+ TRENCH-WALKERS.
TACTICAL ADVANTAGE: NONE.
The horizon was bleeding.
Thousands of heavy, barnacle-encrusted drop-pods bobbed in the churning, crimson-lit waters of the flooded city. Their heavy biometric doors hissed open in unison, a synchronized mechanical chorus that echoed off the ruined skyscrapers of Dar es Salaam.
I stood paralyzed on the roof of the bank building, gripping the rusted railing. From the dark interiors of the pods, the invasion force emerged.
They didn't swim. They dropped like stones into the toxic red water, their heavy, hydrostatic armor pulling them straight to the asphalt of the submerged streets. Through the bioluminescent glow of the Crimson Rot, I could see them marching. An army of thousands of Trench-Walkers, moving in perfect, terrifying unison along the ocean floor, heading directly toward the Tide-Stalkers' enclave—and the path inland to Arusha.
"Tyler," Nayla whispered, her voice trembling as she leaned over the edge. "There are too many. Juma can't punch five thousand of them."
"She is correct," Juma stated, his mirror-polished eyes calculating the threat vectors. "My kinetic cavitation strikes require 1.2 seconds of recovery per target. The swarm will overwhelm my chassis through sheer mass before I can neutralize three percent of their forces."
My earpiece cracked with frantic static.
"Engineer! They are marching right up the main avenues!" Zuri's voice was thick with panic. "My scouts are falling back! We cannot pierce their armor with harpoons! We are abandoning the garage. We have to flee to the highlands!"
"Zuri, listen to me!" I yelled into the comms, turning my back on the nightmare below. "If you run now, they will follow you! They don't need to sleep, and they don't need to breathe! If they break out of the coastal basin, they will march all the way to Arusha! We have to draw the line here!"
"Draw the line with what, mainlander?!" Zuri screamed. "You have a wrench and a bow!"
I looked at my wrench. I looked at the flooded city.
Analyze. Adapt. Dismantle.
We had trapped the water inside the city using the fallen Twin Towers as a breakwater. Dar es Salaam wasn't an open beach anymore; it was a massive, enclosed swimming pool.
And in the center of that pool lay the carcass of the Deep-Trench Leviathan.
"The Leviathan," I muttered, my engineering brain locking onto the physics of the beast. I looked up at Colonel Volkov. "Colonel, before that monster shot Juma, it generated a plasma beam from its throat. An internal biological reactor."
"Yes," Volkov grunted, his brow furrowing. "A super-heated biological plasma sac. What of it? The beast is dead."
"The beast is dead, but the thermal energy in its core takes days to dissipate," I explained, the plan forming at lightspeed. "It's basically an unexploded thermal bomb lying at the bottom of the flooded avenue. Right in the path of the marching army."
"Water is an incompressible fluid," I said, crouching down to quickly draw on the dusty tar-paper of the roof. "In air, an explosion dissipates because gases compress. In water, the shockwave doesn't compress. It travels at v = \sqrt{\frac{K}{\rho}}, directly transmitting the concussive force into whatever it hits."
"The Trench-Walkers," Nayla gasped, her eyes lighting up as she understood. "Their armor is hydrostatic. It's built to withstand slow, constant deep-sea pressure, not a sudden, violent kinetic shockwave!"
"Exactly," I grinned fiercely. "If we detonate the Leviathan's plasma sac underwater, the resulting steam explosion will create a massive concussive wave. The water itself will act as a hammer. It will crush the flexible membrane of every Trench-Walker suit in the basin simultaneously!"
"A localized depth charge," Juma confirmed. "The sudden pressure differential will cause catastrophic internal rupturing of their hydrostatic armor. The mathematics are sound."
"But how do we detonate it?" K-Ray asked, clutching his injured arm. "We don't have any C4 left! And Nayla's arrows don't work on the Asian strain!"
"Her arrows don't overwrite the Asian code," I corrected, looking at Nayla's glowing silver hands. "But the Silver Override is highly energetic. It's essentially liquid lightning. If Nayla can inject a massive, overcharged pulse of silver energy directly into the Leviathan's plasma sac, it will trigger a thermal runaway."
"I have to shoot a dead monster in the throat while it's underwater," Nayla said, a slow, dangerous smile spreading across her face. "I've had harder targets."
"Let's move!" Volkov roared. "We have to get back to the kill zone!"
THE RED AVALANCHE
We sprinted down the stairwells of the ruined bank, bursting out onto the second-floor balcony overlooking Samora Avenue.
The water level had stabilized, but the street below was a terrifying sight. The vanguard of the Trench-Walker army was marching directly beneath us. The red, bioluminescent glow of their helmets illuminated the dark water. The heavy, rhythmic thud-thud-thud of thousands of weighted iron boots marching on the submerged asphalt vibrated through the concrete pillars of our building.
Fifty yards down the flooded avenue, the massive, jagged steel I-beam we had dropped earlier still pinned the dead Leviathan to the street.
"There it is," I pointed. "Nayla, you need to hit the exposed tissue right where its neck meets its thorax. That's where the thermal glow was brightest before it fired."
Nayla stepped up to the edge of the balcony. She closed her eyes, taking a deep breath.
"Zuri," I keyed the radio. "Tell your people to brace for a massive seismic shock! Get away from the windows!"
Nayla raised her hands. The silver veins in her skin didn't just pulse; they flared with a blinding, agonizing brilliance. She was drawing on every last reserve of the viral nanites in her bloodstream. The solid-state silver bow that materialized in her hands was twice as large as normal, humming with a high-pitched frequency that made the air smell of ozone.
She drew the string back, a massive, brilliant silver arrow forming on the rest.
"It's deep," Nayla grunted, sweat beading on her forehead. "The water will slow the arrow down."
"Don't shoot through the water," I advised, calculating the trajectory. "Shoot down the shaft of the steel I-beam! Use the metal as a conductive guide path straight into the wound!"
Nayla adjusted her aim. She locked her eyes on the rusted steel beam protruding from the red water fifty yards away.
Below us, a Trench-Walker paused its march. The bloated corpse inside the helmet looked up, its glowing red eyes locking onto the blinding silver light on the balcony. It raised its heavy rivet-gun.
"They see us!" Volkov yelled, opening fire to suppress the creatures below.
"Now, Nayla!" I screamed.
THWIP.
Nayla released the string. The massive silver arrow didn't just fly; it tore through the humid air like a localized lightning strike.
It struck the exposed top of the steel I-beam perfectly.
The conductive steel instantly carried the massive pulse of viral silver energy straight down into the submerged wound of the dead Leviathan.
For three agonizing seconds, nothing happened. The Trench-Walkers raised their weapons, taking aim at our balcony.
Then, the water began to boil.
THE INCOMPRESSIBLE HAMMER
The thermal runaway was instantaneous.
Deep beneath the surface, the Leviathan's biological plasma sac absorbed the massive jolt of silver energy. The core temperature spiked from a dormant simmer to over 4,000 degrees Celsius in a microsecond. The cold seawater flooding the creature's chest cavity flashed into steam.
KRA-KOOOOOOOOOOM.
The underwater explosion was apocalyptic.
Because the water could not compress, the massive volume of rapidly expanding steam created a concussive shockwave that traveled outward at nearly 1,500 meters per second.
The surface of Samora Avenue didn't just splash; the entire flooded street lifted ten feet into the air. A massive dome of white water and red algae erupted from the Leviathan's corpse, slamming into the surrounding skyscrapers and shattering every pane of glass within a half-mile radius.
The shockwave hit the Trench-Walkers.
The physics were ruthless. The hydrostatic armor of the deep-sea soldiers was designed to maintain a perfect, equalized pressure. When the concussive wave struck them, the external pressure spiked astronomically for a fraction of a millisecond.
The flexible membranes of their armor couldn't adapt fast enough.
Across the entire flooded basin of Dar es Salaam, thousands of Trench-Walkers simultaneously ruptured. Their suits popped like over-inflated balloons, venting their highly pressurized internal fluids into the surrounding water in violent, localized explosions of red mist.
The heavy, rhythmic marching stopped instantly.
The shockwave hit our building, vibrating through the concrete so violently that I was thrown off my feet, slamming hard into the back wall of the balcony.
A torrential rain of red water, pulverized concrete, and shattered barnacles rained down on the city for a full thirty seconds before the harbor finally fell silent.
I groaned, pushing myself up onto my hands and knees. My ears were ringing so loudly I couldn't hear my own ragged breathing.
Volkov was already up, hauling a completely exhausted Nayla to her feet. The silver glow had entirely vanished from her skin, leaving her pale and shaking, but she was smiling weakly.
I dragged myself to the railing and looked down.
The water in Samora Avenue was thick with foam and floating debris. The dark, terrifying shapes of the Trench-Walkers were no longer marching. The surface of the water was littered with the shredded, floating remains of their rusted armor and the motionless bodies of the assimilated corpses.
The entire invasion force, trapped in the basin, had been crushed by the ocean they had tried to use against us.
"Threat neutralized," Juma's flat voice cut through the ringing in my ears. The Silver Sovereign was standing at the edge of the balcony, completely unfazed by the seismic event. "Total hydrostatic failure achieved across all hostile units within the acoustic radius."
"We did it," K-Ray gasped, staring at the devastation. "Tyler... you blew up an army with a dead fish."
"Engineering," I wheezed, slumping against the railing and letting out a breathless laugh. "It's a beautiful thing, K-Ray."
My radio crackled.
"Mainlander..." Zuri's voice was filled with a stunned, breathless awe. "The water is full of bodies. You broke the invasion."
"The basin is clear, Zuri," I replied, wiping a smear of red water from my face. "Your city is yours again."
"No," Zuri said firmly. "It's our city now. The Tide-Stalkers owe you a debt of blood, Engineer. When you are ready to march on the monsters who sent these things... my harpoons march with you."
I looked at Volkov and Nayla. We had come to the coast to investigate a rumor, and we had gained an army.
"Get some rest, Zuri," I said into the comms. "We're heading back to Arusha to repair the ship. Then, we look East."
I turned away from the flooded street. We had stopped the vanguard of the Asian Node, but the Prime Hubs were still out there. The Frozen Hive in Russia, the Crimson Rot in Asia. They knew who we were now. They knew we had the Silver Override.
They had tried to drown Tanzania. It was time we returned the favor.
"Let's go home," I said, slinging my wrench onto my belt. "We have a porch to build, and a world to take back."