Lin Fei's heart is also very entangled, on the one hand, Zheng Fangxing blocked the gun by himself, was seriously injured, and his strength regressed, Lin Fei promised that he was also obliged to let Zheng Fangxing regain his strength.

But on the other hand, Lin Fei's strength is too weak, so weak that he doesn't even have the ability to protect himself, and the strength of the early stage of the first level can also deal with ordinary people and low-level zombies, once he encounters high-level zombies, mutant beasts, or powerful human evolutionaries, then, Lin Fei will definitely die without a place to be buried.

After thinking about it, Lin Fei still absorbed all these four energy crystal nuclei, after all, strong strength is the root of everything, and without strength, everything will be empty talk.

"If the system energy meets the upgrade conditions, will it be upgraded?" The cold mechanical sound of the system is heard.

"Yes, yes, hurry up and level up!" Lin Fei said excitedly that although it was not the first time he had experienced a system upgrade, Lin Fei still couldn't suppress the excitement in his heart.

"I don't know what good things will be upgraded from the system this time, I hope you don't be like the mall last time, a profiteer!" Lin Fei secretly complained in his heart.

As soon as he thought of the system mall, Lin Fei glared angrily, originally, hearing that the system said that the mall was open, Lin Fei suddenly got carried away with joy, and started the spring and autumn dream of eating and drinking without worry.

But later, Lin Fei inquired with the system, and then learned that this kind of trading point used to buy things actually had to be exchanged for an energy crystal nucleus, and a dark green energy crystal nucleus could only be exchanged for ten transaction points, not only that, but Lin Fei also found that in the system mall, the cheapest goods cost more than a dozen trading points, and this high price couldn't help but make Lin Fei scold the profiteers.

"System upgrade complete!" Just when Lin Fei was thinking wildly, the system's prompt sound came again.

"Upgraded? So fast! Hehe, let me see, what's the good thing that has been upgraded? Lin Fei said, his mind moved, and he opened the system interface.

"Huh? There's no new feature to open yet, right? This system can't swallow my four crystal nuclei for nothing, right? Is my crystal nucleus in the water? ”

Lin Fei was shocked in his heart, and hurriedly checked his physical condition - although his body was still in pain as always, Lin Fei felt that his body seemed to be full of strength, and he had inexhaustible strength all over his body, and one punch seemed to be able to kill an elephant.

"It seems that the strength has indeed increased, and I should also have the strength of the first-level peak Great Perfection now, right? However, after absorbing these four crystal nuclei, can I just be upgraded by one level? Lin Fei now has an urge to pull out the system and beat it up.

"System! You absorbed the four crystal nuclei, did you just give me a level upgrade? Lin Fei's tone was already very unkind.

"Host, please calm down, the mall of the system has also been upgraded," the system is not used to Lin Fei, and his voice is still mechanically cold.

"Huh? Has the mall been upgraded? I'll take a look. Lin Fei said, and then quickly shut up, he just focused all his attention on the new function, as for whether the existing function has been strengthened, he didn't notice, speaking of which, he really has some reason for this matter.

Lin Fei opened the mall and glanced at it a few times, "What is the upgrade?" Lin Fei was confused.

"Huh? What's at this time? Lin Fei found that on the basis of the original goods in the mall, there were two more things.

A pink elixir caught Lin Fei's eyes, and next to it, there was a small pill the size of a glass ball, which was pitch black.

"Elixir of life? Lent Soul Breaking Pill? What is this? Lin Fei's face was confused.

"System, what is this life potion?" Lin Fei decided to ask about the system life elixir first, as for the Thirty Soul Breaking Pill - just listen to the name and know that it is not a good thing, let it stay aside for a while to cool off.

"Life Elixir is a product of advanced technology, which can speed up the division of cells, improve and speed up the recovery ability, and with the increase of the level of the potion, the effect will become stronger and stronger." The system is introduced.

"Huh? And this goodies! Lin Fei grinned excitedly, "It's really sleepy, someone will send a pillow!" Lin Feile bloomed, and his mouth couldn't close.

After laughing for a while, remembering what the system had just said, Lin Fei took a closer look at it twice, and sure enough, in the lower right corner of the life elixir, there was an 'I.' written on it.

"This life elixir is actually divided into levels!" Lin Fei couldn't help but be speechless for a while, this system is produced, it seems that all of them have to be divided into three, six, nine and so on!

"So, what is this Lent Soul Breaking Pill for? It can't be some poison! Lin Fei asked.

"Yes, the host, the Thirty Soul Breaking Pill is extremely poisonous, if there is no antidote within thirty days, it will be poisoned and died, and it cannot be solved." The system answered without hesitation.

"Huh? I just said casually, I didn't expect it to be really poison"! "This Thirty Soul Breaking Pill is too domineering! No cure? Lin Fei was startled, he didn't need this poison.

"Then, if I take this Thirty Soul Breaking Pill, will I also die of poison, and there is no cure?" Lin Fei asked tentatively.

"Of course not, when the host buys the Lent Soul Breaking Pill, the system will also be equipped with an antidote for the host accordingly, which will definitely ensure the life safety of the host." The system swears by the guarantee.

"Huh~ It's okay, the service of this system is also thoughtful, otherwise, once you accidentally eat the poison, you don't even have an antidote, and you will die of poison, then you won't die unjustly!" Lin Fei breathed a sigh of relief.

"However, what kind of Thirty Soul Breaking Pill does it sound like a martial arts novel, and if you don't take the antidote, you will die of poison, a proper martial arts novel routine!" Lin Fei complained a few more words.

"By the way, hurry up and change a bottle of life elixir to drink, and then heal the ribs!" Lin Fei was just thinking about spitting up, and he even forgot about business.

However, when this thought came together, Lin Fei was embarrassed - because he had just absorbed all the four crystal nuclei he brought back this time, and there was not even a bit of scum left, so how could there be energy crystal nuclei to exchange for trading points now?

"Careless! This time it's really going to be a rush, obviously I changed out a bottle and drank it, and eighty percent of the injury could be cured. ”

"Although I haven't tried it myself, but the profiteers in this system are a little bit profiteers, but until now, it is also absolutely reliable, Lin Fei believes that the effect of this life elixir will definitely not be bad."

"It's embarrassing now, where to get the energy crystal nucleus!" Lin Fei was so anxious that he spun around.