The staircase leading to the underground of the vault was damp and cold, as if a cloudy wind was blowing up from below.

The shelter was hastily excavated three years ago, surrounded by earthen walls, with low-light light bars hanging from the top, leading all the way down.

After about ten meters of descent, the wide stone steps under your feet became narrower and narrower, and they spiraled downward in a circle.

Ji Zhan followed Jing Sa down, and the narrow and closed field of vision suddenly became wider.

"Wow......" Yu Wu's eyes widened in surprise as he stood on the stone steps and saw the scene below.

Ji Zhan had been to the shelter before, but at this moment, when he saw the so-called black market for the first time, he was still shocked.

The underground shelter was dug out by the people of the fifth base three years ago, and at that time the base was initially established, and the various lines of defense had not yet been erected, and there were often monsters breaking in, and the shelter was dug out in such a desperate situation.

The cave-like space, nearly thirty meters above the ground, is equipped with ventilation devices overhead and on the surrounding stone walls, and the dim light brings a little light to such an enclosed space. Below, the merchants who gathered in the black market to sell their goods sat on the ground, with their own goods in front of them, and they didn't have to shout loudly, and more sellers just held a bottle of wine, drinking and waiting for someone to ask for the price.

The three of them weren't the first guests tonight, and they weren't by no means the last.

They descended from the spiral staircase and walked into this unusual bazaar, where the smooth ceiling stone wall dozens of meters high above their heads reflected the white light, falling like a white holy light, which made people feel a sense of awe when they stepped in.

Most of the people who come to the black market to buy things are dressed like Ji Zhan and them, and they will cover their faces with hats and scarves, and they don't want to be remembered by others, so Ji Zhan and the three of them will not be noticed at all when they walk in it.

Yu Wu held the corner of Ji Zhan's clothes in fear and asked tremblingly, "Ji Zhan, what are we doing here?" ”

Ji Zhan stopped in front of a stall selling weapons, picked up an AK and looked at it carefully, and replied, "Buy something." ”

"It turned out to be shopping...... Shopping?! Yu Wu was startled, but realized that his voice was too loud, so he quickly covered his mouth, and then whispered to Ji Zhan, "Ji Zhan, the black market transactions that are not allowed in the inner base, if you are caught, you will be punished very severely!" ”

"I know, so let's be careful not to get caught." Ji Zhan turned his head to look at Yu Wu, "You have to keep it a secret for me." ”

Yu Wu was stunned, Ji Zhan had already paid for two AKs, a pistol and eight hundred rounds of ammunition.

Ji Zhan and Jing Sa only had 1,500 points set aside to buy weapons this month, and after buying these, there were not many points left for 1,500 points.

Ji Zhan said to Yu Wu: "These should be placed in your space, and you must take good care of them." ”

Yu Wu was flattered, the weight of the two AKs in her arms was heavy, and trading on the black market was not allowed, but at this moment, she looked at Ji Zhan and Jing Sa, who completely trusted her, and there was no fear in her heart.

They have a powerful power that she can't have in her life, and an ordinary person like her would never have intersected with someone like them, but by accident, she became a companion with such a strong person.

Walking with them, it was as if infinite courage rose in her heart.

"Okay." Yu Wu's gaze became firm, and she had already made a choice between the base and Ji Zhan, "I will hide it, and I will never be discovered by others." ”

Yu Wu put the equipment into the space, and continued to keep up with Ji Zhan and Jing Sa.

After buying the weapons, Ji Zhan and Jing Sa did not plan to leave immediately, but continued to walk forward, they both wanted to see what was being resold on the black market.

"Is that the monster's crystal nucleus?" Ji Zhan saw a diamond-shaped crystal in a transparent glass container on a stall next to him, the crystals exuded a cloudy color, and it seemed that there were living beings floating in it.

"Yes." Jing Sa glanced at it and responded.

Ji Zhan couldn't help but wonder: "Why do you sell this kind of thing?" ”

When they fight monsters, they will directly destroy the crystal nucleus of monsters to prevent monsters from regenerating.

But I didn't expect anyone to collect this kind of thing.

Yu Wu was also a little curious, pricking up his ears and waiting for Jing Sa's answer.

Jing Sa said: "There are some ordinary people who have not passed the evolutionary physical examination, and they will take the risk of eating the monster crystal nucleus, and then go for the physical examination again, and there is a high chance of qualifying." ”

Yu Wu heard that someone would eat the monster crystal nucleus, and his stomach felt a little uncomfortable.

Ji Zhan pondered for a moment, she looked at Jing Sa, as if she was silently asking something.

The material composition of the monster crystal nucleus and KP-22 is more than 90% similar, as they both come from the meteorite KP-26.

However, the matter of the raw materials of KP-22 potion is a secret that human leaders will keep before the end of the world, and those who know this secret after the end of the world are even more tight-lipped and would rather bring this secret into the coffin than reveal one more word to unsuspecting humans.

After all, if all human beings know that the root cause of this apocalypse is actually caused by their human beings stealing energy from other planets for the sake of war, then human beings will probably no longer be able to unite against monsters as they do now.

So since no one would specifically tell this secret, why would anyone know to use the monster crystal nucleus to risk passing the physical examination?

After all, if the crystal nucleus and KP-22 are traced back to their origins, they are both substances isolated from the KP-26 meteorite, so if you take the monster crystal nucleus, it will greatly improve the body's various functions, but no one can predict what the side effects of doing this will be.

Jing Sa faced my silent inquiry and said, "This is also something that someone stumbled upon a month ago, and with the first one, there will be imitators one after another." ”

Jing Sa is also a person who is reused by Commander Qiu now, and Commander Qiu will not hide many things from him.

"They have indeed passed the medical examination without any problems, and have become evolutionaries to enter the inner base. However, some of their body stats are slightly different from normal evolutionaries, and it is not yet possible to assess their risk, so they are currently being secretly monitored. ”

It would be a great thing for humans to take the crystal nucleus to turn more ordinary people into evolutionaries, and humans would switch from the prey position to the role of predators.

Ji Zhan looked at the crystal nucleus in the glass bottle and lowered his eyes slightly. Those who take the crystal nucleus without permission are equivalent to voluntarily becoming test subjects.

"Huh? There's a lot of queue there. The sound of the aftermist interrupted Ji Zhan's thoughts.