Hello, is this a letter addressed to Demon Fortress?

Guided by Posel, Lin Gui maneuvers the train along the boundary of the Silent Sea.

Finally, several mermaids appeared on the sea ahead.

They surfaced and waved to the train.

Poseidon gestured for Lin Ghost to enter from that position.

Lin Gui raised an eyebrow without hesitation.

The train was driven straight toward the mermaids who had formed a circle on the sea.

Just before it touched the water.

Poser chanted a long and complex incantation in an ancient sea language.

A huge, transparent bubble is generated instantly.

The entire train was completely enclosed.

The train, enveloped in bubbles, plunged headlong into the sea.

There is almost no resistance when entering the water.

It left only a ring of ripples on the sea surface that quickly subsided.

Several mermaids gracefully swayed their tails, accompanying the bubbles on either side.

Their silvery-blue scales shimmered in the sunlight that penetrated the water.

Like a protective guard, they led the train deeper into the heart of the world.

Lin Gui steadily steered the train, following the mermaid leading the way.

It continued to descend.

The surrounding scenery changes as you go deeper.

At first, you could see the hazy beams of sunlight shining through the sea.

The shallow waters are colorful, with schools of fish swimming around.

Occasionally, you can see fish with demonic features.

For example, a strange fish with bony spines, or a sea crab with an ominous red glow on its shell.

The further down you go, the dimmer the light becomes.

The color was gradually replaced by dark blue.

Corals and strange jellyfish began to appear around us, emitting a ghostly glow.

Their light flickered in the dim seabed, like will-o'-the-wisps.

Some huge dark shadows were roaming in the distance.

The whole picture is obscured, leaving only an unsettling outline.

The temperature dropped significantly.

In the deep darkness, only the faint light emanating from the train and the mermaids accompanying it could be seen.

Illuminate a small area ahead.

The depths of the sea resemble a silent, enormous tomb.

It is slowly engulfing them.

Lin Gui had no idea how deep he had dived.

All he saw was that the last rays of light on the sea had long since vanished.

All around was plunged into pure darkness.

Only the faint glow of light swaying on the mermaid's tail fin ahead guided the way.

It continued to descend.

A sense of oppression surged in from all directions.

It felt as if the weight of the entire ocean was pressing down on my chest.

Absolute silence swallowed all sound.

Even the hum of the train was absorbed by the thick seawater.

Only the sound of my own heartbeat echoed in my ears.

Finally, the fireflies in the distance stopped.

The train was encased in bubbles and suspended on the seabed.

By the faint light emitted by the fireflies.

The seabed can be vaguely seen.

Beneath our feet lay thick layers of silt, accumulated over countless years.

Occasionally, a pale, twisted coral skeleton can be seen protruding.

Like a withered forest at the bottom of the sea.

Further away, the outlines of some huge, indescribable shadows.

It resembled the wreckage of a shipwreck, or the skeleton of some kind of giant beast.

Silently lying in eternal darkness.

The fireflies began to scatter and move about.

It looked like they were searching for something.

The scholar Ellie beside him explained in a low voice:

"They're looking for markers."

"A marker indicating entry into the Silent Sea."

Xia had somehow managed to grab Lin Gui's arm from behind.

The voice trembled slightly:

"Have we... not entered the Silent Sea yet?"

This ranger remained unfazed even in the face of a demonic riot.

At this moment, however, it appears exceptionally vulnerable.

Her fear stemmed from a deep-seated sense of powerlessness.

All lives depend on this seemingly fragile bubble.

Once the bubble bursts.

She didn't know how she could survive in the deep sea, thousands of meters below the surface.

The scholar gave a wry smile.

Pointing to several strangely shaped deep-sea demons swimming in the distance.

"The Silent Sea itself has no demons."

"Why?" Shia asked, puzzled. "Aren't forbidden areas inhabited by demons?"

The scholar pondered for a moment and explained:

"Because in the silent sea, aquatic demons cannot survive."

"As long as you step into that sea area."

"They will keep sinking to the bottom of the sea and will never be able to float back up."

"Ultimately, they will all die from running out of food."

"Whether it's a low-level demon or a legendary one, it's the same."

Shia was even more confused:

"If we go in, won't we be unable to get back to the surface?"

The scholar smiled:

"We are different from aquatic demons; we have hands and feet."

"At that time, we can 'walk' up the seabed."

"Moreover, the goblin leader Stonetooth will be ahead to help us eliminate potential threats."

Lin Gui was somewhat curious:

"Didn't they scout the route beforehand?"

Scholar Elie looked embarrassed:

"The main issue is that we moved up the agreed-upon time by a full two weeks."

"so……"

Lin Gui was speechless:

"The relationship is still because of me."

The scholar simply smiled and did not deny it.

During the conversation, the scattered merfolk sent out signals.

They found the most suitable entrance.

Lin Gui urged the train on, and it slowly drifted towards that direction.

It finally stopped at a strange boundary.

On one side is the slightly murky waters of the Black Reef Sea.

On the other side lies the silent sea, its darkness thick as ink, seemingly capable of absorbing all light.

The two are clearly distinct, like two different worlds.

Lin Gui carefully maneuvered the train past the marker.

The front of the car had just crossed the boundary—

"Bang!"

With a muffled thud, the front of the car plummeted downwards, sinking into the sea mud.

Lin Gui was astonished to find that no matter how he activated the levitation technique, it was ineffective.

They all possess an even stronger force.

Press the front of the car firmly into the seabed!

Poser's voice came through:

"Alright, we have now entered the seabed of the Silent Sea."

"Now everyone get off and push the train on foot."

The beastmen Grom and Magro were the first to jump off the train.

The barbarian warrior Barton let out a low growl, his muscles bulging.

Vice-captain Aubrey also rolled up his sleeves.

Lin Gui was somewhat surprised; he had always assumed the vice-captain was a mage.

Unexpectedly, the opponent turned out to be a shield warrior.

When he exerted himself, his muscular physique bulged beneath his pale beard.

This really surprised Lin Gui.

A steel train weighing hundreds of tons.

With the combined effort of several extraordinary warriors, it was slowly pushed forward.

Their feet were deeply embedded in the mud of the seabed.

Every step left a heavy footprint.

And so, pushing the train, they officially stepped into the territory of the Silent Sea.

Freya instructed everyone to turn on the magic lamps.

In an instant, the once pitch-black seabed was transformed.

It was illuminated by a moving beam of light.

If this light were in the Black Reef Sea, it would surely attract countless deep-sea monsters.

But here, as scholars have said.

There were no demons to be seen, and even ordinary aquatic creatures had disappeared.

Only deathly silence.

The seabed is covered with a thick layer of pale silt.

Occasionally, twisted coral fossils are revealed, resembling grotesque skeletons.

Further away, the outline of the sunken ship can be vaguely seen.

And the skeletons of some creatures that are unimaginably huge.

Half-buried in the mud and sand, it tells of the horrors of the past.

The North Wind caravan pushed the train, struggling to move forward on the rugged seabed.

Ahead of the train, at the edge of a bubble.

Scout Alvin, Ranger Lysa, and Assassin Duru.

He was repeatedly striking the ground in front of him with his weapon.

Check for sturdiness and the presence of hidden holes or cracks.

The goblin leader Stonefang's eyes gleamed with a scarlet light.

As a cave-dwelling race, night vision is almost a natural gift for them.

He kept his eyes fixed on the unseen darkness in the distance, constantly guiding the team.

It led the train around one bottomless trench after another.

The team moved steadily forward on the uneven seabed.

It didn't seem to pose much of a threat.

Shea finally loosened her grip on Lin Gui's hand.

"It seems... to be nothing."

"Crossing the forbidden area was far too easy!"

Lin Gui shook his head and retorted:

"That's because the North Wind Caravan developed this route thoroughly."

"Many undercurrents, traps, and vulnerabilities have been discovered by them."

"Moreover, if it weren't for the exquisite water-avoidance and walking magic of the sea creatures..."

"The water pressure and lack of oxygen in the deep sea alone are enough to be fatal."

"Not to mention, this godforsaken place doesn't even have buoyancy."

"If you fall into the ocean trench, there will be no way out."

Freya, standing nearby, added casually:

"Six years ago, before I first came here."

"All transport convoys attempting to cross the silent sea and open up the golden route..."

"None of them were able to get out."

Her voice was exceptionally clear in the silent depths of the sea.

"Among them were many large and renowned caravans."

"There was even a team led by a legendary archmage."

"They carried the most advanced alchemical ships and protective magic arrays available at the time, and even had several levitation stones embedded in the bottom of the ship."

"But in the end... it also sank forever to the bottom of this sea."

"No remains of the body."