Seeing the black ball in the head of the second-level zombie, Lin Feng was not as annoyed as ordinary hunters, but instead showed a happy expression.

The probability of a black ball being produced in the brain of a second-level zombie is extremely low. Lin Feng doesn’t know how he formed it, nor does he know if this black ball has other uses. At least some of the people Lin Feng met before, the black ball is useless to them.

But it is different for Lin Feng. The black ball can form a super energy exchange system in the supermarket through the experiments done before. The super energy exchange system is now only level one. Whether the black ball can be upgraded to the super energy exchange system remains to be tested.

Lin Feng had not considered the acquisition of the Black Ball before, but he just thought about it and rejected the matter again.

The black ball is known to be useless. When people struggled to kill the black balls obtained by level 2 zombies, they were originally very frustrated. If Lin Feng acquired a large number of black balls at this time, it would mean that it was useful. In this way, someone would definitely study the black balls, and Lin Feng could not explain the other uses of the black balls. In this way, in order to avoid unnecessary trouble, Lin Feng gave up this idea.

At the moment, a black ball appeared. Lin Feng picked up the ball and entered the supermarket. He came to the front of the super energy exchange system and hesitated for a moment. Lin Feng put the black ball into the recycling port of the super energy exchange system.

A few seconds passed, and in Lin Feng's nervous mood, a progress bar appeared again on the large screen on the Super Power Exchange System, and the progress of the progress bar was displayed as one percent.

Really effective!

As expected, as Lin Feng thought, the black ball in the brain of the second-level zombie can really upgrade the super energy redemption system in the supermarket. As for what the upgraded super energy redemption system looks like, Lin Feng is a little looking forward to it. The things in the super energy redemption system that has not been upgraded are already so powerful. The items that can be redeemed in the super energy redemption system after the upgrade may be more than one level.

But now a black ball can only add one percent of the progress of the upgrade progress bar of the super redemption system, that is, a total of 100 black balls are needed to upgrade the super redemption system.

The probability of the black ball being generated in the second-level zombies was very small. It had to wait until a hundred upgrades were collected. I didn’t know that it would take until the Year of the Monkey, but Lin Feng was a little depressed when he thought of this.

After putting away his joys and sorrows, Lin Feng returned to the car and continued to head towards Tianheng Mountain.

As the distance between the Tianheng Mountains became closer and closer, Lin Feng encountered more and more zombies. When he was one kilometer away from the Tianheng Mountains, Lin Feng had consumed nearly a thousand bullets. Even the first-level zombies that had been eliminated reached as many as 80.

Lin Feng did not take out the white crystals from the brains of these first-level zombies. Now Lin Feng has more than 100,000 white crystals on hand, and now he has no time to earn white crystals from the brains of these first-level zombies one by one. If he had not been familiar with the sword technique before, Lin Feng would never have wasted his time.

During this period, Lin Feng also encountered three second-level zombies. This time, Lin Feng did not slowly deal with them, but quickly solved the three second-level zombies. After killing these second-level zombies, Lin Feng obtained three light yellow crystals from their heads.

The advanced zombie Lin Feng didn't know that in this end of the world, it is well known that killing a first-level zombie can obtain white crystals. In addition to a small part of the chance of obtaining a black ball, most of them get light yellow crystals from the brains of the second-level zombies. The energy in the light yellow crystals is ten times that of the white crystals. Not only is the amount of energy, but also in terms of mass, the energy concentration of the light yellow crystals is several times more than that of the white crystals.

The brains of the third-level zombies are dark yellow crystals, and the energy and concentration are several times higher than those of the light yellow crystals of the second-level zombies. The brains of the fourth-level zombies are green pills, the brains of the fourth-level zombies are light green, and the brains of the fifth-level zombies are dark green. As for the effects, it is unknown.

In the future, let alone Lin Feng, I guess even those level 7 cultivators have never seen it. It is said that a person who lost more than 5 can fall into a medium- and large base. Such powerful zombies cannot be seen just by just seeing them.

It is said that zombies of the same level are also powerful and weak. Just like the two level 4 zombies I encountered before, the female level 4 zombies I first encountered were obviously not as powerful as the male level 4 zombies I killed later with Dong Wu.

The degree of zombies evolves differently, so their strengths will naturally differ. They are the same as humans. For example, people who are also at level 4 cultivators have different abilities.

Seeing that there were more and more zombies in front of him, the car was no longer suitable for driving forward. Found a secluded place and parked the car. Lin Feng was about to walk into the mountain.

Fortunately, the thermal weapons and bullets that Lin Feng bought at the Nanshan base were sufficient, and in the unknown situation, more ammunition must be stored. Lin Feng observed through a telescope in this 1,000 meters close to the Tianheng Mountains, and there were at least 300 zombies in front of him. These zombies all walked out of the narrow entrance of Tianheng Mountain. The mountain was steep and the entrances and exits were very narrow. The zombies themselves had no wisdom and walked casually, forming a dense crowd of zombies at the entrance.

Take out a six-barrel machine gun from the End of the World. This is the most powerful gun that can be bought in the Nanshan Base Weapon Store. It cost Lin Feng 1,000 Bai Jing.

The six-tube machine gun has a bullet capacity of 200 rounds, and the price of a single bullet is one white crystal. Ordinary people will be compensated if they use these six-tube machine guns. A bullet may not accurately kill a level one zombie, but the price is equivalent to the white crystal obtained by killing a level one zombie.

Of course, this pair of Lin Feng was set up, six machine guns were stuck, the entire plate of bullets were stuck on the machine gun, and aimed at the zombie closest to it. Lin Feng pulled the trigger.

The huge fire snake roared out of the barrel of the six-barrel machine gun and rushed towards the group of zombies opposite, as if to tear everything on the other side.

The machine gun's firing rate and power are very powerful. Many times, after a bullet penetrates the body of the zombie in front, it directly breaks the body of the zombie into a big hole. After passing through the body of the zombie in front, its power remains undiminished and continues to fly towards the zombie behind.

A whole plate of 200 bullets, under Lin Feng's not very accurate shooting technique, actually shot and killed more than fifty zombies, including several first-level zombies. The first-level zombies are obviously larger than ordinary zombies, which are very easy to defensive.

Just as Lin Feng was secretly applauding the power of the six-barrel machine gun, a thin zombie suddenly jumped out from the opposite side. Unlike other zombies, the zombie hit the ground with four legs and ran towards Lin Feng like an animal. Its speed was much faster than that of the second-level zombies.

Level 3 zombies!
Chapter completed!