[Quest (Part 1): You wake up from the cracks of time and open your eyes to see the world. You decide to move forward and explore.

……

The information in his mind slowly disappeared and faded, and at the same time, Cheng Lin also sensed that the nearby wind had disappeared, the oval hole in front of him was gone, and the entire strange "force field" had disappeared in a long time, leaving only himself still stuck in mid-air, staring at the strange world under his feet.

It is a land of forests and hills, the original topography has changed, and the traces of modernity have completely disappeared, and it is difficult to find a trace.

The barren peaks are full of trees and weeds, almost like primeval jungles, but probably because of the climate, these trees are not particularly luxuriant, and the air humidity is not very high, so there is no fog in the forest.

As for the farther side, it was a similar situation, except that when Cheng Lin looked at the southern end, he faintly saw some ruins in the undulating mountains.

"Great Wall ......" Cheng Lin quickly realized what it was, and immediately sighed.

An era has passed, and some of these buildings remain. But it also gives him a message that he's still in the same position.

"That void is actually leading to another universe? So, it almost drained the air of the earth, leading to the tragic destruction of civilization? It's really ......."

Cheng Lin had mixed feelings for a while, and could only sigh at the fragility of civilization, but in just a few seconds, he recovered from his low mood, after all, ...... I'm used to it, too.

"Well, according to the task reminder, it is for me to explore the north......" Cheng Lin calmed down, gathered his wandering thoughts, and then considered the question of his mission.

He did not fall immediately, but looked to the north, and found that there were similar barren mountains in his field of vision, and he did not see people, but from the logical analysis of the task, if he went in this direction, he would inevitably find something.

"It's flying over...... Still is...... Hey? After determining the direction, Cheng Lin was hesitating, and suddenly noticed that there was a faint reflection of light from a mountain peak in front of him, which was extremely dazzling.

He looked up and saw that a round of the sun had just appeared in the clouds in the sky, and then it was obscured by the clouds again, and the current season was probably the height of summer, and the weather was cloudy.

After thinking about it and guessing that the light was most likely caused by the reflection of the sun's rays, Cheng Lin immediately controlled the He Sword and flew in that direction.

Soon, he slowly descended to the top of the mountain, and when he landed, the plants around his feet trembled and turned their heads in disgust.

Cheng Lin: "......"

Sighing, Cheng Lin tried to cover his breath, using this way to block out the effect of the "plant nemesis", which was a trick he had studied after advancing to the seventh rank.

After doing this, he looked at the top of the mountain, and then raised his eyebrows, the trees on the top of the mountain were relatively sparse, and the big rocks were craggy and all over, Cheng Lin walked over, and then found the "reflection source" - it was actually a small pool, not big, with a lot of rain in it, which looked very clear, and reflected the sky inside.

A few leaves and withered pink-white flowers float slowly across the water, conveying a sense of tranquility.

"Is it just a pool...... Cheng Lin was a little disappointed, and was about to leave, but immediately, not far from the pool, there was a crack on the peak, I couldn't tell if it was caused by the cave or the change of the earth's crust, and the inside was dark, and it seemed to lead to the inside of the mountain.

Cheng Lin's heart moved, he walked over, sighed softly with his right hand, rolled up a wind, and blew away the branches next to the cave.

"Smack!" With a snap of his fingers, Cheng Lin summoned the "Firefall", and then threw it straight into the cave, and in a flash of firelight, he accidentally spied on some strange scenes.

"Huh." Cheng Lin raised his eyebrows, walked over, and took out a tactical flashlight from the storage ring with his hand - although you can see the situation inside by turning on the perception ability, it is not intuitive after all.

Brush......

The bright pillar of light shot out, like a sharp sword, piercing through the darkness, and Cheng Lin stepped in.

At first, the crack in the mountain was very rough, as if it was naturally cracked, but when he jumped and walked down a distance, he found that the mountain had indeed been hollowed out, and there was a huge, abyss-like space underneath.

"It should be a change in the earth's crust, which caused a hole in the top of the mountain, I am currently on the top of this mountain, if I want to go down, I probably can't find a way."

Cheng Lin analyzed it in his heart, summoned the He Sword, the Imperial Sword, circled, and flew down from the narrow gap, I don't know how long it took, he finally landed on the ground, and with the help of the light, he saw the rough stone steps.

"It's a sign of human existence." Cheng Lin nodded, looked around with interest, and found that on both sides of the stone steps, there were ashes-like ruins.

It seems that there were many things in this place, but they have become dilapidated and illegible due to the effects of time.

......During the walk, Cheng Lin suddenly kicked something, he picked it up, and unexpectedly found that it was a rusty spoon.

"This space is probably one of the places where people lived during the Cataclysmic Era, well, I'm not sure about the era, I don't know if it was at the point in time when people moved into the ground, or when the air was thin and caused mass extinction......

Cheng Lin used a little force, and the rusty spoon shattered, and he could only shake his head helplessly and continue to move forward, while looking around.

At this time, he should have been underground, Cheng Lin walked around and found more and more steel residues, as well as ceramics that could still survive for a long time.

One of the things that caught his attention the most were several large, rusty machines, which were large and evenly distributed on both sides of a passage that resembled a "river channel".

The so-called "river channel" was determined by Cheng Lin based on its shape and the residual river sand inside.

"I don't know if it's an underground river or a relatively shallow surface river." Cheng Lin squatted next to a machine, shone it with a flashlight, and then reached out and slapped it fiercely, and the rust and dust cracked one after another.

Cheng Lin looked closely, and he really saw some information, some of the remaining structures on these machines looked similar to switches and knobs, and the interfaces on their sides vaguely meant that they seemed to have been connected to the river by cables.

After using it for a while, Cheng Lin finally found a piece of copper that looked relatively intact, and used his mental power to try his best to identify the blurred handwriting on it: "Electricity...... Untie...... ......"

Electrolysis?

Cheng Lin was slightly stunned, and immediately realized what kind of machine this was, this is clearly a supporting instrument for electrolyzed water, and what will electrolyzed water make? Oxygen, naturally!

"This is the equipment used by people in the cataclysmic era to make oxygen?"

"Yes, at that time, the global air was rapidly extracted, to a point where it was almost difficult to support human survival, the atmosphere was destroyed, and the oceans were evaporating, but after all, this can't be so fast, it takes time, with the huge water storage of the earth, plus the earth's self-repair, it can be guessed that during the cataclysm, there is still no shortage of water on the earth, and groundwater is due to the isolation of the soil, and it is not from the problem of evaporation."

"Humans who hid underground could have used the remnants of the power plant to dissolve water and produce oxygen, but at that time, there must have been very few power plants that could be used passively, and very little oxygen could be produced, which could only barely help a few people survive the most difficult years."

Cheng Lin silently squatted beside the dry river, sighed softly, put the copper piece back in place, and then got up and continued along the ancient river channel.

After a while, he found more electrolysis equipment, as well as metal "oxygen tanks" piled up in batches in the corner, well, I believe that there will be more non-metal oxygen tanks, but they are already rotting.

Walking and stopping, Cheng Lin walked deeper and deeper, and the road ahead was narrow and wide for a while.

Finally, when he came to the end of the river, the light of the tactical flashlight pierced the darkness and shone through, Cheng Lin's originally relaxed expression suddenly tensed, and his two pupils suddenly dilated, as if he had seen an unbelievable scene.

"Squeak Squeak......"

In the darkness, the roar of an unknown underground creature was heard.

Cheng Lin only saw that in front of him, an extremely magnificent metal gate appeared at the end of the underground river, which had been sealed for an unknown amount of time, and inside the door, there were mountains of white bone corpses.

……

……

"Be careful!"

In the dark forest, the cool breeze was blowing, but there was a hint of fishy smell in the air.

A young man covered in armor swung his giant sword and slashed a strange creature that had been struck in the grass in two.

In a vicious roar, some of the two severed corpses were still waving their sharp claws, and the yellow and sharp teeth of the flesh foam of unknown animals remained on the faces that resembled large rats.

Beside the Iron Eat......er, another warrior in similar attire approached and pressed his sword against the beast's mouth, only to see it open its mouth and begin to gnaw at the sword, its metal grinding against its teeth and making a piercing screech.

"We have to be vigilant." The tall young man who was the first to strike shook the blood on the blade of his sword and said.

He was tall and well-proportioned, with dark brown hair, scattered in pieces, his face three-dimensional, his eyes gray and shiny, young and calm.

The armor on his body was shiny, and the position of his chest was depicted with a characteristic coat of arms, which also marked the identity and blood of the lord and nobleman to which he belonged.

However, compared to the slightly complicated emblems, the most striking thing is the light pattern on his left and right forearms, as well as the armor imprinted on the three places around his waist, which is far more complex than the family emblem, and as if it is alive, it flashes a faint light according to the rhythm of breathing, and transmits a wave of spiritual energy fluctuations.

"Shirley, are you alright?" He opened his mouth to look at his companion crouched at the front of the line, originally inspecting the dirt.

It was a young woman, dressed in a strange robe, and it seemed somewhat inconvenient to walk through the forest, but if you looked closely, you would see that she was one of the cleanest in the whole group.

The girl named Shirley did not look back, but picked up a little dark soil with her right hand, and immediately picked up the wooden staff that was poking on the ground with her free left hand, turned around, looked at the team members behind her, and said:

"Look at this soil, it's incredibly rich in metals, and I suspect the 'ruins' are nearby."

"Oh?" Hearing her words, the whole team became visibly serious.

The team was not large, there were about a dozen people, and there were only four members dressed like Shirley, and the rest were men in armor, their armor was uniform, obviously from the same territory, and one of the older women's eyes lit up when she heard this:

"It seems that we are not mistaken, and the 'ruins' marked on the map should be on this mountain, further upstream."

"I think so too," Shirley nodded, dispersing the soil from her hands, patting it down, and then pulling back the strands of hair that had fallen out of her hood, "So, we'll have to hurry up, or we'll not be able to return down the mountain before dark." “

"It's good that I can't go down the mountain, I can go deep into the ruins, and I want to bring back some relics of civilization before the catastrophe rather than just finding the location." In the team, a young man with a strange brass pipe on his back said.

"Wow!" On the ground, a two-headed hound mixed in with the team barked at the same time, as if in response.

"Alright, put away your thoughts, who knows what's in the ruins? If it's safe, it's okay, if it's dangerous, then we're afraid that we can't go back or return, remember, our task is to find it, and then record its location, and go back to tell His Highness, as for the future development, we have to wait for the big army to come. “

The girl named Shirley seemed to be quite popular in the team, and she said very seriously, and the rest of the people could only nod their heads and agree, "Okay, okay, we promise to complete the task." “

The two-headed dog also lowered its head with a whimper, and its four ears drooped limply.

Shirley sighed helplessly, and turned to look at the young man dressed as a warrior with dark and brown hair before: "Rune." “

She didn't speak, and the young man named "Rune" laughed, strode forward, the long sword in his hand swept out the sword wind, and the mysterious runes on the armor lit up: "Okay, leave it to me, I'll open the way!" “

With that, he took a step and took the lead towards the upper reaches of the dry river, and the rest of the people put away their smiling faces and walked forward earnestly and solemnly, while vigilantly looking around for possible danger.

This is the southern tip of the "continent", a dark place that civilization has never explored, an unknown land shrouded in countless years in the cataclysmic era, no one dares to underestimate this place, this is the basic code of every "pioneer knight".

"Look, here! There's a gate here! After a while, the group finally reached the entrance of the "ruins", a half-hidden cave sunken into a cliff, and after clearing the weeds, a huge iron door stood in front of everyone.

"Sure enough, it's a ruin! And it's a high-standard prehistoric relic! Someone shouted excitedly.

"Alright, everyone disperse, look for the mechanism to open, remember, don't move if you find it!" Shirley took a deep breath and shouted.

The team immediately dispersed and began to search around.

The young man with the two-headed dog shrugged his shoulders and said, "Even if I found it, it would probably be broken, this is a prehistoric mechanism, and it has long been rusted to death." “

"Shhhh Be quiet! Listen! Suddenly, the older woman in the line pricked up her ears and shouted.

Everyone was stunned, stopped one after another, and listened carefully, and in an instant, some people's faces slowly changed and became pale: "The voice ...... Inside the door...... Seems to have a voice?! “