"Wait, what is this?" Xu Xin picked up the last two cards.
It was the Mutant Beast Contract (green). There were actually two Mutant Beast Contracts in the backpack.
Maybe he looted everything here and put it in his backpack, and then died here for some unknown reason, so there would be something like this in his backpack.
Without thinking too much, Xu Xin put the two contracts into his backpack. This way he now had five contracts, which was exactly the number that the ring could hold.
After putting the other things back into the blue-level backpack, he put it directly on his back.
The backpack is actually quite small, so while it’s a bit awkward to carry two of them, it’s not a big deal.
Only logs and thin wood in the backpack were heavy, but the blue-level backpack reduced the weight to one-tenth. In addition, his strength was much stronger than before, so he had no pressure at all.
As for the broken blue-level leather armor, Xu Xin thought about it and decided to wear it. He remembered that the weapon and armor crafting table had a repair function. Although he didn't know how much materials would be consumed, it would definitely be less than making a new one.
"With these logs and wood, I can renovate the tree house inside and out when I go back." Xu Xin was happy, but he was only happy for a moment before he calmed down. After all, it was too early to talk about going back to renovate the tree house in this underground city full of dangers.
Xu Xin left the room and closed the door.
Looking deeper into the corridor, he still couldn't see the end, but there were only a few rooms left. There were only three doors that he hadn't explored yet. As for the corridor deeper inside, there were no doors on both sides, and he didn't know where such a long corridor led to.
Xu Xin came to the door of the first remaining room. The door was not locked. He was about to push it open when Coco on his shoulder suddenly reacted.
"Hmm!" Coco cried.
There is danger! Xu Xin narrowed his eyes, and his hand that was about to push the door stopped in mid-air.
This was the first time Coco warned him of danger since entering this corridor.
According to Xu Xin's deduction, there was a very high possibility that a mutant beast was locked up in this house. He took out the broom, held it in his left hand, and held the sword tightly in his right hand, pushing the door open a crack.
The rotten wooden door made an unpleasant creaking sound, and a foul smell came out from the gap in the door.
Not the damp, decayed smell that had been lingering in the room since he had entered;
Yes, it's the smell of a rotting corpse.
Xu Xin had never smelled the smell of a rotting corpse, but he had smelled the smell of rotting meat, which was this smell.
Through the opened gap, Xu Xin looked inside the door.
This room was very large, much larger than any room Xu Xin had entered before, like a hotel reception hall.
The hall was filled with tall iron cages covered in rust. The densely packed iron cage bars made Xu Xin think he was in a prison.
In each cage, there was a wolf-sized beast lying or crouching inside, motionless. Each beast had a faint blood-red pattern on its fur.
"Is this... a mutant beast? Are they... dead?"
Xu Xin opened the door and walked gently into the huge room. Compared with the small stone chambers he had entered before, this room was much larger, with a height of seven or eight meters and an area of at least a thousand square meters.
In such a large area, there are only a few paths of about one meter between the iron cages, and the rest of the space is occupied by these rusty iron cages.
Xu Xin reached out and pinched the railing of a nearby iron cage. The railing had become very fragile due to long-term erosion, and it was deformed with just a light pinch.
The mutant beasts in the cages were motionless, but they did not look like dead beasts. Although the air was filled with a foul smell, these beasts looked very normal and showed no signs of decay.
"Alive?" Xu Xin became more alert.
If these beasts survived to the end, these fragile cages would not be able to stop the actions of these mutated beasts.
Xu Xin's footsteps became lighter.
After tiptoeing around the room, he didn't find anything except this group of mutated beasts.
"There are so many mutant beasts here. Are they specially bred?" Xu Xin pondered. "I wonder if the contract I just obtained can control these mutant beasts."
There are many kinds of wild animals in the cages, including carnivorous animals such as wild wolves and wild cats, omnivorous animals such as wild boars and bears, and even herbivorous animals such as deer and rabbits.
Xu Xin thought about it and decided not to try it for the time being. He still had two rooms to explore. What if he used the contract to wake up all the beasts? These rusted iron cages couldn't even stop ordinary beasts, let alone these mutant beasts.
Withdrew from this room.
The next door was opposite this one. Xu Xin walked to the door and reached out to push it.
"Ying!" Coco suddenly cried out again and tugged at Xu Xin's clothes. This time, its reaction was much more intense than in the previous room. It tugged at Xu Xin's collar, as if it didn't want him to go in at all.
Xu Xin gently pushed open a gap and looked into the house.
The scene he saw through the crack in the door made Xu Xin's pupils narrow. He covered his mouth and almost screamed out.
"What kind of monster is this?"
There were more than a dozen human bodies lying on the floor of the room. These bodies were in different postures, as if they had been thrown here directly by someone.
If it was just dead people, Xu Xin would not be so frightened. Since he came to this world, more than 4,000 people have died in their area alone. Although Xu Xin has never seen how they died, he no longer has a fear of the dead.
But these things lying in this room may no longer be considered human beings.
Most of them were naked, but their bodies were covered with fine red and white fur. The fur was very short, about the length of a short-haired cat, and the red fur formed a red pattern that Xu Xin was very familiar with.
Some of them were still wearing very tattered leather armor or even new gloves, and for the others he could only vaguely tell from the accessories on their hands, feet, and bodies that they might once have been human.
"What is this? Mutated... humans? And they are all survivors?!"
Xu Xin thought of the words carved on the stone table when he came in.
"They are all demons. If they kill me, I will want to die. You will all die miserably..." Xu Xin felt more and more short of breath as he thought about it. "Not only are they breeding mutant beasts here, they are even using the survivors for experiments?"
He turned around suddenly and looked in the direction he came from. The corridor was still dark, with only a faint firelight flickering in the stone room at the end of the corridor where he came from.
The doors he had opened were still the same as when he had closed them, with no sign of any monsters coming out.
"Hmm." Coco called softly and pulled Xu Xin's clothes back. Her meaning was obvious, telling him not to enter the room.
"Are those hairy things on the ground alive?" Xu Xin asked Keke softly.
"Hmm." Coco nodded her head.
Taking a deep breath, Xu Xin slowly closed the door.
There is one last room that has not been explored yet, so let’s figure out the situation first.
The closing door also made a sharp "creaking" sound. Xu Xin stopped at the door for a while, feeling a little guilty. Only when there was no sound from inside did he breathe a sigh of relief and look at the last door.
The last door was actually made of metal. Although it looked a bit old, it had no signs of rust and was even spotless.
Xu Xin tried to turn the door handle and found that this unique metal door was not locked but was opened directly.
Coco on the shoulder didn't react, which meant that it didn't realize there was any danger inside.
Xu Xin gently pushed the door open.