Mobile City Farming Guide

Chapter 356 A Class 0.5 Mobile City Navigating in the Mantle (4K)
Azure Star, Home Island, Central Building Conference Room.

Cardinal Anthony frowned slightly as he looked at the long list of coordinates on the slip of paper.

"So, you're saying this is the exact coordinate of the War Alliance's flagship city in the mantle layer?"

“Yes.” Li Ye nodded.

At this moment, Tomorrow's Alliance had already returned to Home Island, and he immediately met with Anthony and provided him with the coordinates.

Anthony seemed skeptical.

How did you obtain these coordinates?

Li Ye paused for a moment, then answered directly.

"I can't disclose that, but for humanity, confirming these coordinates of the mantle shouldn't be a problem, right?"

“Of course, no problem,” Anthony replied. “We already have reconnaissance forces deployed in the mantle.”

As he spoke, he handed the coordinates to his deputy standing beside him, instructing him to make arrangements.

From Anthony, Li Ye unexpectedly learned three more things.

First, the World Serpent Jormungandr has been defeated and killed by the monsters.

Secondly, humanity has successfully constructed the artificial planet "Fireseed Star" and has successively transported 3 million people to it. Large-scale construction is still underway.

Third, after paying a heavy price, Heath's Tier 5 mobile urban combat cluster finally managed to escape.

Anthony gestured for Li Ye to sit down with him in the conference room and had a disciplinary deacon bring him two cups of tea.

"I was even thinking of retiring back then, but that old guy Victor persuaded me to come back," he said softly after taking a sip of tea. "I never expected to witness the final battle on Weilan Star. It was truly worth it."

Azure Star, the mantle layer.

This is a silent purgatory.

If someone could be there in person, the first thing they would see is the omnipresent light.

Deep, fiery, and scarlet. This light does not come from burning, but from the energy radiated by the rock itself due to extreme high temperatures.

The temperature in the mantle layer starts at a minimum of thousands of degrees Celsius and can reach as high as four or five thousand degrees Celsius, making every inch of space here boil with the primordial energy from the formation of the ancient planet.

Vibrant and turbulent material convection is visible everywhere, and it continues to rise and fall and cycle in the mantle layer for millions of years.

This is the mantle layer, a deep world with an extremely harsh environment, seemingly solid but actually perpetually flowing.

Even so, the human side still deployed troops here—a batch of level 4 mobile cities with a configuration of level 0.5.

Their outer shells are composed of tens of meters thick, interlocking carbonized crystal structures and cooling armor plates, along with giant pores for heat dissipation with supercritical coolant, which allows them to disperse and conduct the suffocating pressure from the mantle.

The Level 4 thermal energy harvesting device installed in front of the mobile city allows it to continuously draw on the terrifying energy from the mantle layer, which is then transported to the Level 4 geothermal nuclear fusion reaction matrix inside the city, thus transforming it into the power that drives the entire city forward.

Among them, "Saint Submerged G7," a level 0.5 mobile city from the Apocalypse Cult, is moving towards the coordinates given by Li Ye.

Initially, the human leadership planned to send a Level 1 mobile city into the mantle layer.

But the terrain of the mantle layer is really terrible.

It was a deep geological universe with incredibly complex terrain, beyond all imagination on the surface, full of violence and the bizarre.

Imagine you are sailing on a plastic ocean that is almost solidified, yet slowly convections and churns on a scale of millions of years.

What lies ahead is not a flat plain, but a massive mantle mountain range that rises abruptly and stretches for thousands of kilometers. Its deep roots and enormous scale make the Himalayas on the surface appear as mere grains of sand in comparison.

Between these colossal mountain ranges lies an equally vast mantle basin, like a depression blasted by an invisible giant hammer, where denser and more ancient substances accumulate, exhibiting greater viscosity, making navigation within it feel like sinking into an invisible swamp.

Even more chilling are the crisscrossing shear zones and fault systems, which are huge scars caused by the mutual compression and displacement of the mantle plates. These scars can be hundreds of kilometers wide and are filled with mylonite that has been broken and recrystallized due to intense friction. They are like a hellish version of the fracture zone, full of dangers.

Perhaps the most magnificent and terrifying thing is the never-ending mantle plume. This is a massive flow of hot material shooting straight up from the core-mantle boundary like a chimney of a super furnace. It is the most violent outlet of energy within the planet, and can be described as a living volcano.

Therefore, a level 0.5 mobile city, only the size of a truck, becomes a better target for exploration.

However, the problem is that the space for a Level 0.5 mobile city is too limited compared to a Level 1 mobile city.

Its entire interior space is divided into several compartments with extremely compressed functions.

The cockpit integrates navigation, control, communication, and monitoring stations.

The environmental control and life support system compartment is filled with pipes, filters, algae cultivation tanks, and waste recycling units.

The engine compartment responsible for maintaining the city's power.

The living cabin is multi-purpose. The walls are fitted with folding beds, and below are storage cabinets. The dining table can be folded down as a workbench or folded up as a maintenance area—almost every cubic centimeter is carefully calculated.

There are only about ten people in the level 0.5 mobile city: helmsman, mechanic, monitoring operator, and researcher, each with their own responsibilities.

There is no daily routine here; everyone's life is divided into fixed shift cycles, such as driving and monitoring, city maintenance and research on the mantle, and sleep and rest.

The mental state of everyone was not good either. They were in an environment surrounded by thousands of kilometers of thick rock, and any mistake—even the slightest damage to the outer shell—would be catastrophic.

The only consolation is that the level 0.5 mobile city is equipped with resource delivery devices, so supplies such as meat, eggs, vegetables, and daily necessities can be delivered continuously, and sometimes there are even letters from family members.

At this moment, the people on board the Saint-Submarine G7 were chatting casually.

"When are we finally going back?"

"It's hard to say. Besides finding the Alliance's Level 7 flagship city, we also have to collect data and conduct scientific research in the mantle layer."

"That's utter nonsense. How could the mantle layer possibly contain a Level 7 mobile city?"

Just as the operator sitting in front of the cockpit was about to interject, the monitoring screen in front of him displayed data from the seismic sonar.

A perfectly flat, almost endless plastic plain stretching upwards, downwards, left, and right.

He immediately realized that this wide area was a huge "stagnant zone" in the mantle convection system.

The coordinates provided by higher authorities point to a specific location within this area.

The operator seemed to realize something, and his heart skipped a beat.

"Perhaps... there really is," he murmured.

Upon hearing this, his companions, who had been talking, were taken aback and turned to look at him.

"What did you say?!"

After explaining the situation to his colleagues, the operator took a deep breath and quickly calculated the route to the stalled area.

The journey was long and arduous.

The Shengqian G7 first needs to traverse a giant mantle mountain range spanning hundreds of kilometers, then cross a mantle basin, and then a molten zone before reaching its destination.

Among all the level 0.5 mobile cities, the Saint-Submersible G7 is the closest.

As the calculation results were being obtained, everyone's hearts began to pound.

Perhaps they really might discover the monsters' level 7 mobile city. After making thorough preparations, the Holy Submarine G7 set off.

As we entered the massive mantle mountain range, the images on the screen were a vast, slowly rising darkness that filled the entire field of vision.

The slope of the mantle mountains far exceeds any concept of the Earth's surface, and its surface is not smooth, but covered with sharp ridges and folds like a black glass forest composed of huge olivine and pyroxene crystals.

The Shengqian G7 then activated its Level 4 acoustic fluidization device, which emitted a coordinated sound wave field that acted like an invisible iron, painstakingly "softening" a narrow, passable tunnel into the highly viscous mountain slope ahead.

During the voyage, everyone felt the continuous, thunderous groans of friction and compression emanating from the external structure, as well as the even louder roars of the city's engines as they struggled against the immense gravitational force.

Occasionally, the city's outer shell would tremble violently as house-sized clusters of scorching crystals would break off from the mountainside and crash into the city's outer shell like a slow-motion avalanche.

Having finally driven out of the mantle mountains, the mantle basin ahead presented another challenge.

It resembled an endless, plastic swamp, its light deep and even, with almost no reference points.

As soon as the Shengqian G7 entered, its speed dropped sharply.

The sensor showed that the viscosity of the surrounding material increased sharply, as if it were being dragged by an invisible force.

Sailing here consumes enormous amounts of energy, yet one can barely feel any progress—undoubtedly a brutal test of patience and resources.

As for the molten material capsules, they are even more troublesome.

Just hearing the name might make you think it's some kind of organ. But that's not the case at all. This is a churning, giant liquid lava lake composed of supercritical fluids and partially molten crystals, with temperatures high enough to vaporize metal instantly.

Therefore, the Shengqian G7 needs to have its internal cooling system set to maximum power.

Ultimately, the level 0.5 mobile city arrived at its destination safely.

At this moment, everyone felt as if they had merged into a boundless, uniformly terrifying void.

There is no terrain, no reference points, only plastic material ironed almost perfectly flat under extreme pressure, stretching infinitely to the horizon.

All the noise experienced during the previous voyage vanished suddenly, replaced by a deeper, more absolute silence.

The only sounds were the amplified hum of the city's own life support system, the hissing of coolant circulating in the pipes, the low groans of the structural framework caused by uniform immense pressure, and the rhythmic pulsation of the power engine running steadily.

Against the backdrop of boundless emptiness, such sounds, instead of bringing comfort, intensify a sense of loneliness swallowed by pure nothingness.

There was no turbulence, no turning, and not even a sense of forward motion. Only the cold, fluctuating numbers on the screen proved that the Saint-Germain G7 was sailing at a constant speed through this terrifyingly flat landscape.

At this moment, its voyage became smooth and efficient.

"This is almost like the ocean on the planet Azure," the helmsman murmured.

A sense of panic and unease gradually rose in his heart.

Because I am getting closer and closer to the truth.

In fact, everyone's thoughts and feelings are the same as his.

"Scan the area at the coordinates remotely using sonar devices," the lord ordered.

The operator nodded and immediately began the operation.

A probe pulse then travels towards the area at the coordinates at a pre-set rhythm.

Everyone remained silent, quietly awaiting the outcome.

At this moment, time seemed to slow down considerably.

A dozen seconds later, the sonar produced the results.

A huge, blurry, but unusually regular echo signal.

Its scale is so large that it almost exceeds the system's automatic scale.

The operator sat bolt upright, his heart skipping a beat.

He quickly adjusted the sonar device, switching it to focused pulse mode, and conducted another detection.

This time, the echo was no longer blurry.

The sonar images were painstakingly constructed on the screen, eventually merging into a single picture.

This scene presents a striking geometric angularity and symmetry—shapes that could never have been born in the naturally chaotic mantle layer, with clear, architectural-like layers and protrusions on the surface.

"Tick."

Unbeknownst to them, a bead of sweat from the operator fell to the ground.

"It's true! It's really true!" His voice was distorted with extreme excitement. "The enemy's level 7 flagship city is definitely here!"

After the initial shock, everyone came to their senses.

"Report the findings to the higher-ups immediately!" the lord ordered.

At this moment, everyone was filled with immense excitement.

In his excitement, the helmsman suddenly realized something, and his smile gradually froze on his face.

“Since it’s a Level 7 mobile city, it must have detection capabilities beyond our imagination, right?” he stammered. “Maybe they’ve already discovered us.”

The scene fell silent once again.

As if to confirm the helmsman's statement, a dense array of light spots immediately appeared on the screen.

The camera shifts to the exterior of the Holy Submarine G7, where countless fire monsters are swimming towards it.

For the fire-loving and heat-resistant Fire Demon civilization, the mantle layer was simply a better paradise.

The helmsman's guess was correct; the moment the Holy Submarine G7 entered the stationary zone, the Alliance's flagship city had already spotted it.

Without a doubt, the Holy Submarine G7 is now doomed.

But everyone felt more relaxed than they had imagined.

"Now, we have completed our mission," the lord said calmly. "The rest is up to our companions."

Home Island, conference room in the central building.

Upon receiving the message, Anthony jumped to his feet, his expression becoming more solemn than ever before.

“The intelligence is accurate; your coordinates are correct,” he said to Li Ye in front of him.

Li Ye nodded slightly, his heart beginning to stir.

If the human side can destroy the alliance's flagship city, they will gain the upper hand in the war.

However, to his surprise, Anthony frowned.

"However, fighting in the mantle is not an easy task."

(End of this chapter)