Chapter 70: Chapter 69: The Trial Node

Time Remaining: 32 Days, 06 Hours. (Status: Day 4 of the 7-Day Deadline. Trial Phase Active.) Location: Sector 7-Bravo – The Waste Reclamation Unit.

The tank was not empty. It was filled with the ghosts of a thousand industrial failures.

Arthur stood at the access hatch on top of the massive central reservoir. He looked like a monster from the deep. He was wearing a heavy, rubberized diving suit scavenged from the scrapyard. It was patched with black tar and smelled of old sweat and sulfur. On his head was a heavy brass helmet with a single, thick glass porthole. Trailing behind him was a bundle of hoses—one for air, and a thinner, fabric-wrapped cable for the Hard-Line Intercom.

“Sound check,” Arthur shouted inside the helmet. The acoustics were terrible; his own voice echoed back at him, tinny and metallic.

“Reading you clear,” Vivian’s voice came through the small acoustic speaker in his ear. It traveled through the copper wire woven into his air hose. “Pressure in the bypass line is holding steady. But the main tank is still reading critical toxicity. Are you sure about this?”

“The filter is clogged,” Arthur said. “If I don’t clear the intake manually, the bypass is just a bandage on a bullet wound. I have to scrub the artery.”

He grabbed the heavy iron wheel on the hatch. CREAK. GROAN. The rust fought him, but the wheel turned. The seal broke with a hiss of escaping gas. The smell hit him instantly, even through the suit’s filtration. It wasn’t just sewage. It was a dense, chemical sweetness—the smell of mana that had gone rotten. It made his eyes water behind the glass.

“Going down,” Arthur said.

He lowered himself into the darkness.

Inside, the tank was a cathedral of sludge. The only light came from the electric lamp mounted on Arthur’s helmet, which cut a weak yellow beam through the gloom. The walls were coated in inches of black, crystallized mana-residue. The floor was submerged in waist-deep muck that glowed with a faint, sickly purple light—raw waste mana that had stagnated because it couldn’t flow.

Arthur waded forward. The sludge was thick, like cold molasses. It resisted every step. Sloop. Sloop. In the center of the tank stood the Primary Filter Column. It was supposed to be a pillar of perforated steel mesh, designed to separate solid debris from the liquid mana-slurry. It was unrecognizable.

The steel mesh was completely encased in a hard, calcified shell of “Scale.” It looked like coral made of concrete and rust. The Empire’s high-pressure pumps had sucked the minerals so hard against the mesh that they had fused into stone.

“I see the problem,” Arthur said into the hard-line. “The filter is calcified. The pumps are sucking against a brick wall. No wonder the pipes are shaking; the machine is suffocating.”

“Can you chip it off?” Zack asked from the control room deck above.

Arthur pulled a heavy steel pry-bar from his belt. He struck the scale. CLANG. A spark flew, but the rock didn’t crack. “It’s too hard,” Arthur grunted. “I need to liquefy it. I’m going to use the Solvent Injection.”

Arthur hooked a heavy rubber hose to his belt. It was connected to a tank of industrial acid on the deck. He squeezed the brass trigger on the nozzle. HISS.

A jet of steaming green acid hit the scale. The calcified rock bubbled violently. White smoke billowed up, clouding Arthur’s visor. The rock turned into grey slush and began to slide down the column like melting wax.

Arthur worked methodically. He started at the top and spiraled down. It was grueling, physical labor. The heat inside the suit was stifling. Sweat ran into his eyes, but he couldn’t wipe them. The air from his tank tasted like warm rubber and copper. But inch by inch, the steel mesh was revealed. The First Era copper underneath shone dully in the gloom.

As he cleared the filter, the tank began to change. The frantic vibration in the floor plates slowed down. The high-pitched whine of the pumps outside dropped an octave. The machine wasn’t screaming anymore. It was humming.

“Arthur,” Zack’s voice crackled in his ear. “Flow rate is increasing. Pressure is dropping on the intake gauge. You’re unclogging the artery!”

“I’m almost done,” Arthur grunted, blasting the last patch of scale near the bottom.

Suddenly, the floor shifted. A massive bubble of trapped gas, freed by the cleaning, erupted from the sludge beneath his boots. BLORP.

The force was like a punch to the chest. It knocked Arthur off his feet. He splashed face-first into the toxic purple muck. His visor was covered. Darkness. The acid hose slipped from his hand, spraying wild.

“Arthur!” Vivian shouted over the line. “Biometrics are spiking! Are you breached?”

Arthur scrambled up, his heavy boots finding purchase on the slick floor. He wiped the purple slime from his faceplate with a rubber glove. The glass held. No cracks. “I’m okay,” he panted, his breath fogging the glass. “Just a burp. The system is venting gas pockets. It’s a good sign.”

He grabbed the hose. He finished the job. The filter was clean. The sludge in the tank began to swirl—a smooth, creating vortex as it drained properly through the mesh. The “Purple” glow began to fade as the stagnant mana moved downstream.

“Get me out of here,” Arthur said, grabbing the ladder rungs. “Before I dissolve.”

Day 5: The Tuning

Arthur emerged from the tank dripping with slime. Vivian hosed him down with fresh water on the deck before he even took the helmet off. He stripped out of the suit, gasping for the relatively fresh air of the factory. It still smelled like ammonia, but compared to the tank, it was perfume.

“The block is gone,” Arthur said, toweling off his hair. “Now we tune it.”

He walked to the Harmonic Dampener he had built. It was a strange-looking device. A large copper coil wrapped around a magnetic core, bolted to the main output pipe. It wasn’t welded rigid; it was mounted on thick rubber blocks salvaged from the scrapyard.

“Zack, bring the main pumps online,” Arthur ordered. “Slowly. 20% power.”

Zack turned the massive iron wheel. THRUM. Steam hissed. The floor vibrated. The black sludge began to flow through the system. The Imperial pipes rattled. Clack-clack-clack. The rigid steel fought against the fluid pulse of the mana.

“It’s still fighting,” Silas said from the corner. The Overseer was clutching his clipboard, looking at the vibrating pipe with dread. “Vibration is at 45 Hertz. Too high. The Director will not accept this. He wants silence.”

“He’ll get silence,” Arthur said. “Watch.”

He grabbed a heavy wrench. He walked to the Dampener. He didn’t touch the pipe. He touched the Springs holding the copper coil. He tightened the nut on the left. Squeak. The copper coil shifted slightly.

He waited. The vibration in the pipe changed pitch. It went from a rattle to a hum. He tightened it again. And again.

He was tuning the pipe like a guitar string. He was adjusting the tension until the resonant frequency of the dampener matched the frequency of the vibration. By tightening the springs, he was telling the copper coil to absorb the shake.

Suddenly, the rattling stopped. It was instant. The copper coil began to hum softly, swaying gently on its rubber mounts. It was absorbing the kinetic energy. The main iron pipe? Dead still.

“Vibration dropping,” Silas read the gauge, his eyes widening behind his spectacles. “30 Hertz… 20 Hertz… 12 Hertz. Stable.”

“Increase power to 50%,” Arthur ordered.

Zack turned the wheel. The flow increased. The pipe stayed still. The Dampener hummed louder, dancing with the energy instead of fighting it.

“100%,” Arthur said.

Zack spun the wheel all the way. The pumps roared. The waste flowed at maximum capacity. The floor did not shake. The bolts did not rattle. The “Scream” of the metal was gone. The system was silent, efficient, and smooth.

“It works,” Vivian whispered, lowering her hammer. “It’s not fighting the earth anymore.”

“It’s swimming,” Arthur corrected, wiping grease from his hands. “We stopped trying to be a dam and started being a river.”

Day 6: The Observation

The fix was done, but the test wasn’t over. They spent the next 24 hours just watching. Arthur didn’t sleep. He sat in a metal chair in front of the gauges, drinking stale coffee from a tin cup, watching the needles.

They didn’t twitch. The pressure held steady at the green line. The temperature dropped by 15 degrees. The “Feedback Loop”—the pipe pumping heat back into the ground—was cold to the touch. The system didn’t have excess heat anymore. It wasn’t wasting energy fighting itself.

“No new structures,” Arthur murmured, looking at the log. “No magic spells. Just physics.”

Zack sat next to him. “Do you think Kael is watching?”

“Kael sees everything,” Arthur said. He pointed to the corner of the ceiling.

Bolted to the iron beam was a heavy brass housing the size of a breadbox. A thick glass lens, magnified like a telescope, peered down at them. A bundle of fabric-wrapped cables ran from the back of the device, disappearing into the wall. Inside the box, something was spinning—a faint, rhythmic whirrr-click, whirrr-click

—as the lens mechanically scanned back and forth. ( A Nipkow Disk )

“He’s watching the gauges,” Arthur said. “Counting the vibrations through the wire.”

Day 7: The Verdict

The deadline arrived at dawn. The hangar doors rolled open with a groan of metal. Director Kael did not come. Instead, a convoy of black armored cars arrived. A squad of Imperial Engineers swarmed the facility. They were men of science, dressed in pristine grey coats. They didn’t carry weapons; they carried clipboards, calipers, and brass vibration sensors.

They measured everything. They checked the welds on the bypass. They tested the tension of the dampener springs. They analyzed the chemical composition of the filtered water. They ignored Arthur. They treated the machine like a crime scene.

Arthur stood by the railing, arms crossed, waiting. The blinking red light on his collar was the only reminder that this was a trial for his life. If the engineers gave a thumbs down, Silas had the remote.

Finally, the Lead Engineer—a man with a monocle and a severe expression—approached Silas. He whispered something, pointed at a graph, and nodded once. A stiff, reluctant nod.

Silas walked over to Arthur. He looked stunned. “The report is verified,” Silas said, his voice trembling with relief. “Sector 7-Bravo is operating at 115% efficiency. Heat output is down 40%. Vibration is negligible.”

“And the mana output?” Arthur asked.

“Constant,” Silas said. “You didn’t increase the power. But you stopped the bleeding.”

A soldier ran up, carrying a heavy wooden box on his back. He set it down on a crate and cranked a handle on the side. Whirrr-Click. He handed Silas a heavy brass receiver connected to the box by a thick, fabric-wrapped cord. A Field Telephone.

“The Director is on the line,” Silas said, handing the heavy receiver to Arthur.

Arthur held the brass cup to his ear. The bakelite handle was cold. “Pendelton,” Arthur said.

“Impressive,” Kael’s voice came through the wire. It was faint, tinny, and overlaid with the static hiss of miles of copper cable. But the authority was unmistakable. “My engineers tell me you fixed a critical failure with scrap metal and rubber bands.”

“I fixed it with physics, Director,” Arthur said into the mouthpiece. “I stopped forcing the machine to be rigid. I added flexibility.”

“You proved your point,” Kael said. “Your ’Passive Flow’ theory has merit. For this district.”

“It applies to the whole city,” Arthur pressed. “The Core is just a bigger version of this tank. If you let me install dampeners on the main arteries, I can stabilize the grid.”

There was a long silence on the other end. The static hissed. Arthur waited. He touched the collar.

“I am watching the data,” Kael said slowly. “The oscillation in Sector 7 has dropped. The ground is… quieter there. But the Core is a different beast.”

“Give me access,” Arthur said. “Let me finish the job.”

“Not yet,” Kael said. “You fixed a kidney. That does not mean I will let you perform open-heart surgery.”

“But,” Kael continued, “I am extending your contract. The collar stays on. But your range is expanded.”

“Expanded to where?”

“To Sector 4,” Kael said. “The Deep Shafts. That is where the vibration originates. If you think you can tame the dragon… go to its lair.”

Click. The line went dead.

Arthur looked down at his chest. The red light on his collar beeped once. It turned from Red to Yellow. Standby Mode.

Arthur exhaled. He hadn’t realized he was holding his breath until his lungs burned. “We live?” Zack asked from the control board, holding a wrench like a weapon.

“We live,” Arthur nodded, handing the receiver back to the soldier. “And we got a promotion.”

“To where?” Vivian asked.

“To the Deep Shafts,” Arthur walked to the map on the wall. He pointed to the lowest, darkest point of the city schematic. “We’re going down to the mantle. To the source of the heat.”

“Why?” Zack asked.

“Because Kael is right,” Arthur said, looking at the humming dampener. “I fixed the symptom. Now I have to fix the disease.”

End of Chapter 69

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The Tech: The Nipkow Scanner

Real-world history: Invented in 1884 by Paul Nipkow.

How it looks: A heavy brass box with a glass lens. Inside, you would hear a faint whirring sound.

Mechanism: Inside the box is a spinning metal disk with a spiral of holes punched in it. As the disk spins, it “scans” the room line-by-line, allowing light to pass through to a selenium photocell.

The Signal: It turns light into electrical pulses (Morse-style analog signals) that travel over the copper phone lines back to the Citadel.

What Kael Sees :

He is not seeing a high-definition video stream.

Resolution: Extremely low (maybe 30 vertical lines).

Frame Rate: Jerky and slow (10 frames per second).

Color: Monochrome (Green/Black or Orange/Black depending on the phosphor screen).

The “Vibrations”: When Arthur says “He’s counting the vibrations,” he likely means Kael is literally watching a Paper Strip Chart Recorder or an Oscilloscope next to the video feed. The camera might just be for verifying that Arthur is actually standing there, while the real data comes from the vibration sensors bolted to the floor.

Source: Webnovel.com, updated by NovelKeep