An icy chill continued to emanate from the narrow cave.
If he wanted to enter the cave and explore, he probably wouldn't be able to explore comfortably with his current equipment.
The chill emanating from the cave alone was enough to make Xu Xin, who was standing at the cave entrance, shiver. The temperature inside must have been below minus fifty degrees Celsius, or even far lower.
He glanced at the time. It had only been more than half an hour since he started climbing up. There was still plenty of time before the twelve-hour deadline given to him by the mission.
And he had already climbed more than three hundred meters.
It's not surprising, because this twelve-hour time limit is for ordinary survivors. And today, with his increased arm strength, his climbing speed is much faster than that of ordinary survivors.
He took plenty of time to stop and explore along the way.
"Ka..." There was another subtle sound.
This time, because he was at the entrance of the cave and the sound came from inside the cave, Xu Xin could hear it very clearly.
It sounded a bit like something cracking.
For example, the sound of rocks cracking or ice breaking.
Xu Xin looked at the corner at the end of the cave and decided to go in and find out what was going on.
Instead of taking out the energy core fragment directly, he walked in slowly.
If there was any danger inside, the light from the energy core fragments would likely disturb it.
In this freezing high altitude, he couldn't afford to be careless at all, so he could only walk quietly into the cave by himself.
He walked gently, step by step, to the corner of the cave.
Although they had just separated for a short time, Xu Xin already missed Coco a little.
If it was Coco, she should have told him by now whether there was any danger in the cave.
If there was no danger, the little guy Coco would probably jump off his shoulders and rush in before him.
Of course, Coco couldn't stand such low temperatures.
He took a deep breath, and the icy chill penetrated directly into his heart and lungs.
The temperature around him was already below minus fifty degrees Celsius, and he could already feel the chill, which was probably equivalent to the feeling of going out in short sleeves in the middle of winter.
However, because his physique is now extraordinary, he can still endure this kind of cold as long as it does not last too long.
He took out a blue-level iron sword from his backpack. Yes, it was the iron sword he made for use in caves when he was exploring the dungeon before.
This time the cave was also very narrow, of course, it was much more spacious than the maze cave last time. That time I could only pass through sideways, but this time at least I could walk normally.
Turning the corner, there is a straight narrow passage.
This straight and narrow passage, which is less than one meter wide, is different from the cave outside the corner. The rock walls are relatively neat, a bit like a passage built by humans.
There was a thin layer of frost on the stone walls of the passage.
A strange feeling arose in Xu Xin's heart. He always felt that this place was inexplicably familiar.
"Card… "
The subtle sound came from the end of the passage. He quickened his pace and walked forward quickly without making any sound.
Soon, he came to the end of the passage.
"This is… ?"
The extremely biting cold could not hide his surprise at this moment.
At the end of the passage, there was actually a door!
A... somewhat rotten wooden door!
The entire door is very rotten and even crooked. The entire facade is very shabby and has some cracks. There is a thin layer of frost on the wooden door.
This door looks like it will fall down if you push it.
This wooden door looks so familiar!
The material, the degree of decay, and the familiar door handle style...
Aren’t these the rotten wooden doors of the rooms in the underground city where he found Chang Yin’s family
This... Why is there such a wooden door here? !
and…
He turned around and looked.
The familiarity of walking through this passage gradually fermented, and memories began to emerge in his mind.
It's the stone wall of the underground city passage!
The stone walls of this straight passage are made of exactly the same material as the stone walls of the dungeon!
However, the passages in the underground city, even the narrowest place, are much wider than here. Moreover, the rotten wooden doors are on both sides of the passages, while the only door here is the one at the end of the passage, so he did not recognize it immediately.
Underground city... ? There is an underground city in this giant peak, high in the sky
"Card… "
Another noise came from inside the room, behind the door that was almost completely rotten.
Whatever made the noise was inside.
So weird!
Xu Xin could feel that because of the low temperature, the air here was very dry, so the air humidity was also very low.
If he took a deep breath, he would not only shiver with cold, but also feel a little dry in the mouth.
If this door had been kept in such a low temperature and dry environment for a long time, it would not have been possible for it to decay like this!
The wooden door of the underground city had decayed because of the extremely humid environment, so humid that water droplets even dripped from the rock wall above.
The door here shouldn't be...
Looking at the frost on the wooden door, it felt to him as if... the originally humid and warm environment suddenly became very cold, and the moisture was directly frozen on the door, making it look as if the door was frozen.
…Yes, didn’t this mountain appear suddenly
It suddenly appeared overnight, rising from the ground.
Wait... rising from the ground
Xu Xin seemed to understand something.
Could it be that... this place is originally a dungeon
However, since the entire stone pillar peak rises from the ground, should we bring part of this underground city out
…Yes, that should be it.
This also explains why the environment here suddenly changed.
I never thought that he could explore the underground city on the snowy peak at an altitude of more than 300 meters.
After standing there motionless for a long time, Xu Xin felt like he was going to be frozen to death by the low temperature here.
He buried his head in his snow fox scarf, took a breath, and then reached out and pushed the frozen door in front of him.
The door was frozen tightly at this time and could not be opened easily.
Helpless, Xu Xin could only increase his efforts.
"Ka!" The door was not pushed open, but pushed down.
This rotten wooden door was totally unable to withstand the current low temperature and freezing, so he not only pushed the ice away, but also pushed the door's hinge, causing the entire door to fall backwards.
“Bang!”
Although the door was rotten, it was frozen solid. When it fell to the ground, it made a sound of ice hitting the ground, and it was not damaged at all and was still intact.
And Xu Xin also looked into the room.
The room was not big, and was roughly the same size as those rooms in the dungeon. After all, this was a room in the dungeon.
"This is..." His eyes widened and he immediately stepped on the door that was pushed to the ground and stepped into the room.
In the middle of the room, there is a device that looks a bit strange.
The lower part of the device is made of iron and is covered with red rust, while the upper part is made of glass. The whole device is square in shape. At first glance, it looks like a strange fish tank.
However, due to the rapid change in temperature, the entire device seemed to be frozen, and the glass was covered with frost and cracks, just like a piece of tempered glass that had been broken and cracked but still stuck together, and you couldn't see what was inside at all.
Xu Xin could hear some rustling sounds coming from inside, and... faint breathing
Um?!
Is there anything alive in here?!
The whole device is not big, about the size of a fish tank. The largest thing inside should be no bigger than a kitten, right
"Ka..." Another sound came from inside.
This time, the sound was very clear and he heard it especially clearly.
He finally knew what that sound was!
This is the sound of an eggshell breaking!
Inside, there is a little thing hatching!
"This..." Xu Xin was shocked.
How could any living thing be able to hatch at such a cold temperature
That must not be an ordinary creature!
Xu Xin didn't think any more and found a spot on the broken glass box that was far away from where the sound came from. He stabbed a hole in it with a sword, then reached out and grabbed the glass and pulled the entire piece of glass backwards with force!
“Crash!”
The glass fragments were scattered all over the ground, and the things that were hidden inside appeared before his eyes.
Sure enough, it was an egg!
An egg bigger than an ostrich egg!
A white egg covered with cracks!
This egg is too big. At least on modern Earth, there is no such big egg.
Xu Xin's first reaction was dinosaur eggs, but he immediately rejected it. The species in this world are basically the same as those on Earth, and there shouldn't be any species that have been extinct for tens of millions of years.
However, Xu Xin couldn't help but wonder, what kind of egg is this
It should be... the egg of a giant beast, right
About the same. If the giant creek crocodile could lay eggs, they might be even bigger than this.
He looked around the room, which was empty except for this strange device.
Is this room simply used to hatch it
The movements in the egg became quieter and quieter, and the breathing sounds became fainter and fainter.
Oh no, the temperature is too low, the creature in the egg is going to die!
Xu Xin was about to take out the energy core from his backpack when he suddenly stopped.
Could the creature inside this egg be a blood-marked creature
If it is a blood-marked creature, then if he takes out the energy core, will he be able to kill it
However, according to his previous judgment, it can be seen from his beloved concubine and the two little ones that the bloodline mutation is most likely a non-genetic mutation, an acquired mutation, and a mutation that can be gradually upgraded and should not be passed on to future generations.
Therefore, the possibility that the little creature in this egg is a blood-marked mutant creature is very small.
Thinking of this, Xu Xin took out the energy core fragment.
In an instant, the surroundings were illuminated by bright and soft white light, and the temperature soared rapidly. Within a dozen seconds, it rose from minus 60 to 70 degrees Celsius to around 20 degrees Celsius.
"Huh..." Xu Xin let out a long sigh, feeling comfortable!
So comfortable!
The little creature in the egg before him was equally comfortable.
There was no more rustling movement in the egg, but breathing had resumed and become steady.
Xu Xin felt the comfortable temperature while thinking.
How did this egg survive until he came here, and why did it suddenly crack
He thought of the small hole below where he had taken out the energy core fragments.
Xu Xin had already tested the impact range of the energy core fragments. The temperature within a radius of fifty meters could be maintained at around 20 degrees, and the area within a radius of one hundred meters would be affected.
This cave was only five or six meters away from the cave where he had just squatted and rested, so it was naturally affected.
The egg, which was originally frozen, began to move after sensing the change in the surrounding temperature, which attracted Xu Xin.
That's right.
The little creature in the egg breathed steadily but stopped moving. It must have exhausted all its strength and fallen into a deep sleep.
Creatures in eggs...
Either a reptile or one with wings.
If it were a winged beast...
Gotta take it away!
But how do I take it away
His backpack can't carry living things, so he can't just hold it in his arms, right
Is a bracelet okay
Xu Xin tried to touch this strange egg with the bracelet.
The egg, which was already covered with cracks, immediately entered the bracelet.
It really works!
The introduction of the bracelet says that it can accommodate mutant creatures, but it does not say that it can only accommodate blood-marked mutant creatures.
This strange egg is larger than an ostrich egg. It is most likely the egg of a giant beast. It has the blood of a giant beast and is also a mutant creature, so it can also be stored inside.
Just like that, miraculously, Xu Xin obtained a strange egg that should have been hatched in the underground city while climbing the giant peak.
After putting the egg away, Xu Xin felt the warm temperature for a few seconds, then collected the energy core fragments and returned the same way.
Soon, Xu Xin reached the entrance of the cave.
The temperature at the cave entrance was maintained above minus fifty degrees Celsius, allowing his body temperature to return to normal.
It was really cold inside the cave.
Keep moving forward.
Just as he was grabbing the rock wall at the entrance of the cave, feeling the chill of the rock in his hands, and preparing to continue climbing, suddenly, he heard the sound of breaking wind behind him, and a sense of crisis suddenly rose in his heart!
There is danger behind!
Without a second thought, he rushed into the cave.
"Zizka!" The sound of something scratching across the rocks and crushing them directly.
What's attacking him?!