Hello, is this a letter addressed to Demon Fortress?

Three weeks after Lin Gui left Jiandun City.

The fourth observation point is located outside the Wall of Sighs.

This is a high rocky platform with a wide view.

In the distance, the legendary "wall" stretches across the sky and the earth.

It was not made of bricks and stones, but a boundless, thick, viscous gray-white fog wall.

It soars into the clouds, stretching to the horizon on both sides.

It was as if the whole world had been cut in two.

Inside the fog wall, shadows were blurred and no details could be seen; there was only a chaotic gray-white expanse.

A continuous, low, mournful sigh drifted on the wind.

Layer upon layer, as if thousands of people were weeping in my ears at the same time.

Looking in the direction of the sound, the edge of the fog wall was completely empty.

Only wild grass swaying in the wind and bare rocks.

Lin Gui stood at the edge of the platform, closed his eyes and concentrated for a moment.

When she opened her eyes again, her black pupils had turned into a cold, pale gray.

There are tiny glimmers of spiritual light flowing within them.

[Eye of the Underworld] is now available.

The field of vision suddenly changed.

At the edge of that seemingly empty wall of mist ahead, from which came sighs.

Countless translucent, distorted "things" were slowly drifting around.

They could be vaguely discerned as human figures, but their limbs were bizarre, and their joints were reversed.

He held a spear-like weapon formed from withered branches, bones, or pure shadows.

Its face was blurred, with only its black, hole-like mouth opening and closing from time to time, emitting that endless sigh.

They have no physical form, like smears of dirty paint smeared in the air, ugly and eerie.

Lin Gui closed his eyes, shutting out the unsettling sight.

He turned around and looked at the center of the platform.

Eve was kneeling there.

She clasped her hands together in front of her chest, her soft, short hair blowing in the mountain breeze.

His eyes were closed, and his long eyelashes cast faint shadows on his pale face.

Beneath her knees, a complex magic circle about two meters in diameter was emitting a soft, milky-white glow.

The lines and patterns of the array are ancient and sacred, flowing with some higher level of power fluctuations.

At several key points of the magic circle, some items were carefully placed:

A leather notebook with worn edges.

An old linen shirt, faded from washing and patched on the shoulders.

A few strands of short, dark brown hair were carefully tied up.

There was even half a piece of dried, hard, blackened root that looked like some kind of plant.

Lin Gui tried to analyze the magic array, but gave up after only a short while.

It is not driven by magic, but by another, more subtle and sublime energy.

Perhaps it is what is called "divine power".

He secretly practiced breathing techniques in an attempt to capture and sense this power, but to no avail.

Even Eve, who has used it for many years, cannot explain in what specific form this power exists.

It seems to exist somewhere between "having" and "not having".

When Eve cast her divination spell, Lin Gui could not sense any energy fluctuations.

If it cannot be seen or touched, it naturally cannot be "absorbed".

It will not be included in the system's rewards.

Through the magic circle, Eve is prophesying the location of Avalon.

Eve cannot predict the location of a target based on a name alone.

She needs a physical medium, preferably an item that is strongly associated with her target.

For example, items related to the people of Avalon.

Lin Gui didn't even know what Avalon looked like.

It is even less likely that they would possess items belonging to so-called "Avalon natives".

But he knew someone who was very likely in Avalon.

Rogue, the knight who was taken away by the white-haired demon king.

If Rogge does not reach his destination.

Therefore, the location predicted by these items will not be inside the Wailing Wall.

Fortunately, Eve's guidance clearly pointed to the inside of the walls.

Moreover, judging from the results measured at other nodes...

Rogge is very likely still alive.

Time passed quietly.

The mountain wind howled, carrying with it the endless sighs from beyond the wall of mist.

Suddenly, Eve's body trembled slightly.

The clasped hands slowly separated.

Extend an index finger, pointing straight into a certain direction deep within the fog wall.

Her arm was a little stiff, but her fingertips were steady without trembling.

"In that direction," she whispered, her eyes still closed.

"Don't move."

Lin Gui immediately stepped forward and took out the surveying tools that he and Shia had bought at the dwarf markets along the way.

A metal compass with precise markings.

And a wooden goniometer with adjustable angle.

He knelt on one knee to Eve's side.

Carefully place the compass base onto the ground and adjust the aiming device of the goniometer.

Aiming at Eve's slightly taut index finger, I began recording the azimuth and elevation data.

Their movements were meticulous, as if they were conducting a rigorous engineering survey.

After recording, he quickly spread out the map that marked the locations of the first three nodes.

From the current "fourth node".

Draw a straight dotted line along the direction you just measured using a ruler.

It runs through the entire gray area that represents the Wall of Sighs.

Finally, it intersects with the other three straight lines.

"Is it alright, Mr. Lin Gui?" Eve asked softly, maintaining her posture.

"That's fine."

Eve finally breathed a sigh of relief and slowly lowered her arm.

She opened her eyes, a hint of weariness flashing in them.

Then he picked up all the items belonging to Rogue on the magic circle and held them in his arms.

Place it in a wooden box.

the other side.

Lin Gui's gaze fell on the map.

The four straight lines extending from different nodes are now clearly visible.

Two lines intersect within the area representing the Wall of Sighs.

They eventually converge into two very close points.

This proves that during the past three weeks of mobile observations...

Rogge's position has changed slightly, but only by a small margin.

The two points of intersection are only a few millimeters apart.

At a map scale, the actual distance may only be a few kilometers.

This is quite fitting for the size of a small city-state.

Lin Gui carefully circled the two adjacent dots with a charcoal pencil.

If nothing unexpected happens, this is the location of Avalon.

The location of Avalon has been pinpointed.

Lin Gui breathed a sigh of relief; the biggest obstacle preventing him from reaching Avalon had been eliminated.

The only remaining question is how to...

We must traverse this Wall of Sighs before us, a wall teeming with countless wandering spirits and demons, a wall that has devoured countless powerful beings.

If it weren't for Eve.

Lin Gui is likely to plunge headlong into the Wall of Sighs.

Aimlessly searching for Avalon's whereabouts.

He turned around, looked at the saintess who was tidying up the magic array items, and said sincerely.

"Miss Saint, we really owe you a lot this time."

After hearing this, Eve looked up and smiled gently.

She leaned against the cold metal hull of the airship, her short, light-gold hair slightly disheveled by the wind.

A sly glint flashed in those captivating eyes.

"So... how are you going to thank me?"

Lin Gui pondered for a moment, then a slight smile appeared on his lips:

"Shall I make you your favorite crispy pork belly?"

Eve clapped her hands gently, a bright smile spreading across her face.

"It's a deal!"

After packing up all the surveying tools and magic array items, Lin Gui sat back in the pilot's seat of the flying boat.

He found Eve still standing there, showing no intention of coming up.

"What's wrong?" Lin Gui turned to look at her in confusion.

Eve hesitated for a moment, then unconsciously gripped the hem of her skirt with both hands.

She looked at him with an unprecedented seriousness in her eyes.

"Mr. Lin Gui".

"Um?"

Eve took a deep breath and said solemnly, word by word:

"I have something very important to ask you."

Lin Gui raised an eyebrow slightly.

Did she see something else in the prophecy just now?

His expression turned serious: "You speak."

Eve raised her hand and gently pressed it to her chest, her expression incredibly solemn, as if entrusting her life to someone else.

"Wait a minute..."

She paused.

"Please drive slowly."

Lin Gui: "..."