The train hadn't traveled long after entering the deep pit when, under the illumination of the searchlight, Bai Cheng quickly discovered they had arrived in an extremely vast area.

Before them was an incredibly spacious square, with surrounding walls several meters high, intricately carved with many strange totems.

Stone pillars stood in rows, supporting the ceiling above, preventing this space from being submerged by quicksand.

Besides being grand and vast, this place also exuded a sense of ancient civilization; at least, judging by the surrounding architecture, it was clearly not something an ordinary race could have built, but rather seemed like the handiwork of humans.

Due to the limited light from the searchlight and the train still moving, they couldn't observe the totems in detail.

But the next second, the train suddenly let out a loud bang, and the enormous noise of metal friction and collision instantly echoed perpetually in this vast interior space.

The three people on the train stumbled from the sudden stop. Leng Ningxue looked out the window and immediately said, "No more tracks ahead?!"

The railway tracks hadn't actively generated again in front?

Bai Cheng's eyes showed some surprise; indeed, every time they arrived at a new terrain, there were always unexpected troubles.

Previously, who would have thought that there would be a day when the railway tracks wouldn't generate?

"Then we get off," she said, frowning. This was clearly the route the system had set for them.

"What's that ahead?" Yu Nian was still standing in place, looking at a high wall outside the front of the train.

Upon closer inspection, she suddenly realized that the high wall was carved with many monstrous beasts with bared fangs and claws, and a black line ran down the middle, dividing it into two halves.

It wasn't until she saw the huge door hinges made of black stone on both sides of the high wall that she suddenly understood: "This is a damn door!"

"Forget the door, quickly pack your things!" Leng Ningxue rolled her eyes at her and directly dragged her away.

"Hey, hey, that's a door! A door as tall as a floor! Aren't you surprised?!"

"So why do you think the train stopped here?"

The space inside this underground deep pit was very dark. Although they didn't know its exact size, any sound the three of them made would produce a long-lasting echo in this space.

Moreover, the light emitted by the train alone was not enough for Bai Cheng and the other two to clearly observe their surroundings.

Since the train had stopped, it meant that the task for this deep pit was at hand.

The three quickly packed their personal belongings: food, fresh water, and most importantly, flashlights.

"Call out Red Flame!"

In their opinion, the format of this deep pit was probably not much different from a Station; similarly, the train couldn't proceed, and they needed to get off to complete a task.

The only difference was that this time the train's stop carried some risk, and they could return at any time.

Bai Cheng nodded to Red Flame, who immediately understood.

Red Flame instantly transformed into a giant Red Flame Lion. Its blazing flames were bright and hot, almost instantly illuminating the entire surrounding space.

Under the reflection of the firelight, the murals on the side walls clearly came into view.

In addition, the three also discovered that besides being spacious and tall, this area was more like a straight, narrow passage; the large door was ahead, and behind them was an endless darkness.

No wonder the train had traveled for so long after entering the deep pit.

"Nian Nian, Ningxue, look what this is?" Yu Nian rubbed the thin layer of sand on the ground with her toe. After pushing it aside, a black ground was revealed, with a strange black-red pattern within it.

As Yu Nian spoke, she continued to rub along this pattern on the ground.

But soon she found that these patterns intertwined and crisscrossed, countless in number.

"It should be some kind of formation, right?" Bai Cheng guessed, "Red Flame, scatter them."

Upon hearing this, Red Flame immediately burst forth with its aura, and a terrifying wave of air instantly swept through the surroundings.

In an instant, all the sand layers on the ground were blown away, and the entire space seemed to be vibrating slightly, causing countless dust particles to fall.

A huge circular area was cleared by Red Flame, but looking at the black-red patterns crisscrossing the ground, the three still found nothing.

"It seems to be something irrelevant, let's ignore it." Then Bai Cheng's gaze returned to the murals on the wall.

The group actively approached them to observe, trying to find some useful information.

As expected, these murals depicted ❖ Nоvеl𝚒ght ❖ (Exclusive on Nоvеl𝚒ght) different scenes. Through analysis and piecing together, the three eventually deciphered a strange story.

"This looks like a human built this underground city. What is he holding in his hand? A holy relic? Those monsters are all kneeling."

Leng Ningxue said seriously, "It seems that the group of magical beasts worshipped the power of this 'sacred artifact,' but then that person disappeared, perhaps died."

The last mural was severely damaged, preventing them from discerning any useful information.

In short, it looked like some rebellion or invasion had occurred, and finally, the sacred artifact released its power to completely bury everything.

Undoubtedly, that thing must have some mysterious connection with the shrine core.

Yu Nian also thought of this: "Can we enter here if we use another shrine core?"

"Who knows, maybe we'll just go back to the surface?" Bai Cheng spread her hands.

The three were still planning to go look at the huge stone door, but suddenly a dazzling light appeared behind them.

The three paused their steps and turned around simultaneously; it was a train.

"Other people were also drawn here?"

As for the system's claim that it would attract all hostile creatures in the desert, she didn't pay it any mind.

What kind of creatures could there be in this barren land?

Soon, that train, just like Bai Cheng's, approached without any precautions, and surprisingly didn't slow down even when it reached the stone door.

The three stood aside, silently covering their ears with their hands.

Bang! After a loud crash, the Survivors inside the train were also shaken senseless.

Getting off, they saw it was Bai Cheng's old acquaintance, Ye Liangchen.

"It's you?"

"It's me."

"How did you get here?"

"Do you think I wanted to come?"

"But you still came."

Then, several lights flickered at the end of the passage, and many more trains arrived here.

Bai Cheng frowned: "Why are they all here?"

"Is there a possibility that if you don't come, you die?"

These trains were getting faster and faster; they even saw the two trains stopped at the end, and not only did the new arrivals not slow down, but they even accelerated.

The four instinctively took a step back. This time, Ye Liangchen also covered his ears in sync with the other three.