Shen Feng didn't expect Li Keyi to kneel down so decisively, he hurriedly grabbed Li Keyi's arm and said seriously: "Don't be like this, don't be like this, if you need my help, say it and I'll listen, maybe I can help you, except for what I can't do, I will try my best to help you." ”

Li Keyi was pulled up straight by Shen Feng, but she still knelt on the ground, as if Shen Feng didn't agree to help, she wouldn't get up.

"You'll be able to help me, I know!" Li Keyi said affirmatively, and said his request with red eyes: "I beg you to lend me the head of a corpse king, I want to take revenge, and I want to make the guy who killed my parents pay for it with blood!" ”

"What the hell are you talking about? What's the deal with revenge? The moment Shen Feng heard this, he didn't understand what was going on, but he figured out Li Keyi's purpose, he still wanted the head of the Corpse King, probably because he wanted to become an Alien after making a potion, right?

"When I went out today, my parents were fine, and I asked them to wait for me at home, but when I returned home, the community was already on fire, and I learned from my neighbors that they chose to run to the street when the fire broke out, but they were not in good health, and they were scattered by the crowd, and finally trampled to death." Li Keyi said uncomfortably.

"Well, I can understand your desire for revenge, so let's do it, I promise to give you the ability potion, but you follow me back to Yuzhou after the war, I am particularly short of scientific researchers." Shen Feng thought about it and suggested to Li Keyi.

Shen Feng now put forward a proposal to get the best of both worlds, you can't give the ability potion for nothing, this thing is particularly precious, but if Li Keyi is willing to follow him to work in Yuzhou, then there is no problem, it just so happens that there is a lack of scientific researchers in the laboratory.

Li Keyi shook his head vigorously and explained, "No, I don't need the head of the Corpse King to make a special potion, but to extract substances!" I studied the origin of the supernatural and the evolutionary principle of the evolutionary person, and found that the difference between the supernatural and the evolutionary must be related to the existence of a substance! ”

Hearing this explanation, Shen Feng couldn't help but nod and asked, "You go on, what kind of difference is there between an Alien and an Evolutionary?" ”

Li Keyi knew that if she wanted to get Shen Feng's consent, it was useless to just cry, and sometimes the last thing a man believed in was tears, so she had to give a satisfactory answer.

Li Keyi continued: "Evolutionaries and Aliens both use evolution potions, and evolution potions can be made as long as they use the brains of mutated zombies, and the essence of evolution elixirs is virus proteins, and the difference between anomalous elixirs and evolution elixirs is that the materials used are different, the heads of mutated zombies and the heads of corpse kings!" After laboratory analysis, a conclusion was reached that there is a special channel for transmitting information between the corpse kings, which can communicate across long distances, and in the battle of Rongcheng, the corpse kings of Yanjing can quickly obtain information, which is the evidence. ”

"So what?" Shen Feng asked.

Li Keyi said seriously: "In other words, there is a special substance in the head of the Corpse King, and this substance is the source of the power of the Stranger!" As long as you can extract it, you can use its characteristics to find the location of the rest of the corpse kings! The current war is no longer something that can be solved casually, only by killing all the corpse kings, the war will really end, and I can take revenge completely! ”

Shen Feng pondered for a moment, and felt that what Li Keyi said made sense, but the risk was a little bigger, if the extraction of this substance failed, wouldn't it be a loss of a corpse king's head in vain, which was worth two abilities.

When Shen Feng was difficult to choose, he always liked to ask for other people's opinions, so at this moment, Shen Feng looked at Chu Chaoyan and asked, "Chaoyan, what do you think?" ”

The corners of Chu Chaoyan's mouth twitched twice, and he asked rhetorically: "I'm a liberal arts student, you ask me?" ”

Shen Feng looked at Yang Chang and Lu Xian, both of whom also spread out their hands and said that they didn't know, obviously they didn't have any suggestions.

At this time, Shen Feng was very helpless, if Senior Sister was by his side, or Professor Chu was by his side, he could give himself a suitable answer, but now, he had to make a decision by himself.

Li Keyi saw Shen Feng hesitate, knowing that the other party's belief was now wavering, as soon as she thought of her parents who died tragically, she began to kowtow to Shen Feng, and said while kowtowing: "Please believe me, now I just want revenge!" ”

Seeing this, Shen Feng hurriedly grabbed Li Keyi's shoulders, relentlessly, and said, "I promise you, I promise you!" But you're going to do experiments in the place I've prepared, I don't want to see you run away, I'll find out what equipment you need. ”

Li Keyi raised her head, and the tears in her eyes couldn't help flowing down anymore, at this time, her long and smooth hair was already scattered, and after being wet with tears, it was stuck to her face, looking like her name. Li Keyi's name means very simple, pitiful, and a bird.

Shen Feng couldn't help but reach out and pick up Li Keyi's hair, and comforted: "Don't cry, you're all a cat, get ready, find a quiet tent to experiment." ”

Li Keyi said to do it, put forward the instrument he wanted, Shen Feng hurriedly arranged for Yang Chang to look for it, and the laboratory was very simple, just put a few tables in the big tent, the sound of guns and cannons on the front line could be transmitted to the tent at all times, and the attack of the zombies outside the city was continuous all night, fortunately, there was a tall city wall as a barrier, and the human side could barely resist the attack of the zombies.

Guo Pinming has been commanding front-line operations these days, his command ability is still very qualified, and when there is no mistake at all, Shu Daping also told Guo Pinming the news as soon as he got the instructions from his superiors, and Guo Pinming always carried it out meticulously.

The zombies' offensive has become more and more ferocious, especially the zombies' tactics have also changed, no longer rushing forward recklessly, but digging forward, the zombies began to dig trenches, little by little close to the city wall, gasoline bombs and white phosphorus bombs were fired in the city, killing the zombies digging trenches, but a group of zombies died, so when the flames no longer burned, the zombies would be replenished again, and the process of digging the trenches did not stop.

In the next week, the corpse king has been controlling the zombie attack in the front, and the mutant bird is also constantly transporting zombies from the air into Yanjing, and the battle outside the city is okay, no matter how cunning the zombies are, it is always impossible to have an advantage in front of modern weapons, but the battle in the city is not right.

Zombies will land on the ground from any of the sky in Yanjing, even if there are zombies in the Forbidden City, in this case, everyone in the city is in danger, there is no absolutely safe place, there is a basement where it is good to say, hiding in the ground will always be much safer, but there is no basement place, once the zombies destroy the city, everyone will swarm to the subway, at this time the subway is not running, and its role has become a bomb shelter.

The train from Yanjing to Jinmen runs all day long, originally ten trains a day, but more and more people are fleeing, and the railway station has to provide twenty trains a day, in order to survive, everyone can't wait to leave Yanjing, at least there is no danger to their lives in Jinmen.

In such a critical situation, there was a call from the people of Yanjing, that is, to negotiate peace with the zombies, demarcate the area for the zombies to live, and end the war as soon as possible, only in this way can the crisis be completely resolved, otherwise, the protracted war will kill more people and more civilians!

Someone heard about the battle of the TV tower to encircle and suppress the corpse king, and after the civilians spread the news, they became even more emotional, even if it was for the sake of the overall situation, they couldn't ignore the lives of civilians, right? Why kill the Corpse King even at the expense of civilians? Aren't the lives of civilians worth anything? Is it only the merit that counts?

The hearts of the people in the city are completely broken, many people think that they will hold on until the war is won, some people think that peace must be negotiated immediately, only the end of the war is the most important thing, and some people don't care what the war is like, they just want to grab seats on the train, even if there are no seats, as long as they can leave Yanjing, it will be enough!

For many people, Yanjing is a completely sad place, I thought that Yanjing was very safe, so I dragged my family to come, but who knew that this is the most dangerous place, if I can leave Yanjing, I will never come back in the future, even if this is the capital.

Shen Feng took Yang Chang and Lu Xian to kill zombies in the city every day, although their strength was limited, they could contribute their own strength, the role of these strangers fighting on the city wall was far less than killing zombies in the city, they could only shoot zombies on the ground on the city wall, but they could save people in the city.

Finally, a week later, Li Keyi came out of the tent with dark circles under her eyes, she looked very haggard at this time, after all, she hadn't slept much during this time, except for squinting for a while, otherwise she had been experimenting.

But there was a light flickering in Li Keyi's eyes, she found Shen Feng and said, "I succeeded, I have extracted this element, this is an element that does not belong to the earth, or even an element that does not belong to this universe!" ”

When Shen Feng heard the news, he immediately became happy, and rushed to the tent with a group of people, there were a lot of data scattered on the table of this temporary laboratory, and the top of these papers was a petri dish, and the petri dish contained a small pinch of powder, which was gray-white powder, which looked very ordinary.

"That's what you call an element? It looks ordinary! Shen Feng looked at this bit of powder and couldn't believe it.

In Shen Feng's eyes, these powders were like chalk ash, and he couldn't see anything abnormal.

Li Keyi said with certainty: "I dare to say that this is the substance that causes human beings to obtain supernatural abilities, this is an extraterrestrial element, an element that does not belong to our universe!" Extracted from the head of a corpse king, although it weighs only five grams, it is indeed the origin of the ability! ”

When Shen Feng heard Li Keyi's explanation, he couldn't help frowning, and said to himself, "An element from outside the universe? When do I seem to have heard of it, why can't I remember? ”

Li Keyi was also a little puzzled at this time, and said: "I also think it's strange, obviously the zombie virus is recognized to have originated in the Pacific Ocean, but the initiator is the extraterrestrial element, and it is not clear how the extraterrestrial element came to the earth." ”

Now Li Keyi can only prove one thing, and that is that the ability comes from an element that does not belong to the earth, but she does not know how this element came to the earth.

Shen Feng heard Li Keyi's analysis, and immediately thought of an incident in Jiangyang at the beginning, when he got the information from the laboratory, and when he discussed it with Teacher Niu, there was a hypothesis that was rejected, that is, the virus came from a meteorite that fell into the Pacific Ocean last year!

"I see, the extraterrestrial elements followed meteorites to Earth!" Shen Feng patted his head, and at this time figured out the source of the zombie virus, it must be a meteorite that fell in the Pacific Ocean with a zombie virus, which spread in the sea with the ocean current, and then entered the rain and fell on land, which eventually caused the zombie infection to mutate!

When Chu Chaoyan and the others heard the origin of the zombie virus, their heads were immediately dizzy, and they couldn't understand it, didn't they all say that the zombie virus was most likely to be the melting of the Antarctic glaciers, so the ancient virus reappeared? Now it seems that the virus came from outer space.

"This, this, this...... I can't understand, I really can't understand! Yang Chang couldn't accept this fact, waved his hand and said, "This is impossible, the zombie virus comes from other universes?" How could such a coincidence occur? A meteorite from another universe happened to fall on the earth, which caused the zombie outbreak and the beast mutation? That's! ”

Li Keyi rubbed the dark circles under his eyes, and said very haggardly: "Whether you believe it or not, this is the truth, a meteorite caused the end of the world!" Otherwise, the Outer Universe Element can't explain it! ”

"Could it be that you made a mistake in the measurement? These elements don't come from outside the universe? Chu Chaoyan hurriedly asked.

Li Keyi shook his head and said seriously: "I didn't believe that this was an extraterrestrial element at the time, until I did two experiments in a row, and this was the result, and I didn't believe it completely!" And you supernatural beings actually have extraterrestrial elements in their brains, otherwise, you wouldn't be able to use them! ”

After saying this, Li Keyi took out a test tube containing the evolution potion, which was a pink solution, and then took out half of the universe element from the petri dish, and after dissolving it in the evolution potion, the evolution elixir also changed color, and at this time it was a pale green solution!

"Got it now, right? The most important of the ability potions is the Outer Element, and as long as you have the Outer Element, the Ability Flask can grant human abilities! Li Keyi took the ability potion he had just made at this time to show off.