The gravity of thunder world is about 3900 times that of the earth. It is full of black gravel and a black desert.

Guo Lingfeng grabbed a handful of black sand with great interest, rubbed it and said, "babata, these sands are actually magnetic?"

Babata said with a smile: "the whole world here is forged by the strong masters of the world with the 'Cosmic original energy'. The foundation of the whole 'Lord of the world' is the cosmic crystal. Of course, it is much more special than the outside world! Forget these first, you'd better finish the task first!"

The test task in the "thunder world" is to get the one horn of the "one horned iron rhinoceros" and the "wind corner stone" in the wind thunder canyon.

Slaves do not need to complete the assessment task, so they need 4 items for each task.

For the four of Guo Lingfeng, it was easy to hunt and kill Unicorn iron rhinoceros. There were two spiritual teachers, Guo Lingfeng and Luo Feng. When they came to the habitat of this fierce beast, they directly began to kill, and soon killed more than a dozen.

After cutting off one horn, he quickly went to the location of the next mission item - Fenglei canyon.

I met two groups of people along the way, but the other party didn't dare to provoke them when they saw that there were many of them.

Generally, the adventure team entering the "thunder world" is five or six people, including one or two star level low-level masters, and the other four or five star level eight or nine slaves or bodyguards.

Some teams have more people, but there are not many teams with more than a dozen people and 28 people. And each of them is a star level nine, where they can really be regarded as "a large number of people".

After coming to Fenglei Canyon, no fierce animals can survive here, because the wind here is too strong.

The strong wind in Fenglei Canyon contains "the original energy of the universe", which is just like a knife. Most of the "wind corner stones" they need to collect are in the central area of the canyon, and only a few are scattered around the periphery of the canyon.

Fortunately, Guo Lingfeng's "Moyun vine" has broken through to the cosmic level. Its long vines are extremely tough. Collecting wind hornstones can be said to be easy and pleasant.

After collecting the mission items, they can become trainee mercenaries as long as they leave the "thunder world", but Guo Lingfeng knew that there was another opportunity here, so he lied that he suddenly had an understanding of the field of wind attributes and needed to practice temporarily in an environment like wind and thunder canyon.

Hong didn't think so, because it was normal, so they chose a cave to live here for the time being.

Sure enough, a few days later, a mountain peak in Fenglei Canyon suddenly cracked, revealing a "black hole".

All the people in the whole "thunder world" are boiling, because this "black hole" is the entrance of the middle world!

Babata hurriedly popularized knowledge to the four earth "bumpkins": "The Lord of the world can create a world or create another world in this world. Hidden here, the world in this world is called 'boundary in the world'. However, it is very difficult to build another world in the world. First, the 'boundary in the world' needs to be very stable and needs a large number of cosmic crystals as the foundation!"

The cost of building "boundary in boundary" is very high. It is usually used by the Lord to hide treasures or his own inheritance.

In a word, there must be great opportunities in the "world in the world"!

Otherwise, the Lord of the world has water in his head? Why bother to build such a "world in the world"?

Guo Lingfeng they no longer hesitated and hurried into the "world in the world".

……

The news of the discovery of "boundary in the world of thunder" soon spread in the Heilongshan empire. So many people will certainly report to their own forces if they come to participate in the trainee mercenary assessment.

Guo Lingfeng and they also sent an email to Mingyu.

There was no way. He knew that although the cultivation of those who entered the "middle world" was limited to the star level, all forces behind would come to compete, and there were millions of people entering. They were only 28 people. They couldn't even turn a spray, so they had to temporarily rely on the "sanax mountain" force where Ming Yu was located.

Guo Lingfeng and his team rely on "moyunteng" to enter the "middle boundary" and drill into the underground from time to time.

Although Guo Lingfeng knows that he needs to find "Thunder Stone" here to exchange for treasures, there are cosmic crystals everywhere underground. This is the hard currency in the universe. Don't dig white!

One square cosmic crystal is equal to 1000 cosmic coins, and one cosmic coin is equal to 3300 dry witch coins. Digging one square cosmic crystal is equivalent to earning 3.3 million dry witch coins.

"Moyun vine" has 72 vines, each of which can extend more than 300 kilometers. It is used to excavate cosmic crystals with frightening efficiency. In just one day, they dug 135845 cubic cosmic crystals, which is a windfall.

In fact, if Guo Lingfeng goes all out, it is estimated that he will dig more than that.

However, he knows that the value of the cosmic crystal is the lowest in the "middle world". There are hundreds of treasures left by the Lord of the world. Those are the real treasures. Even the domain lord or the Lord of the world will be jealous.

So while digging, he still took Hong and them to the middle of the "boundary".

On the seventh day, they finally came to the central area.

In these seven days, they experienced a total of 11 robberies and killings.

The opponents are all star level nine. Even if there are more people than them, they have nothing to fear. After all, their team has 12 spiritual teachers, and their combat effectiveness is much stronger than those of martial arts. Moreover, Guo Lingfeng and their four have fields. Facing the ordinary stellar ninth order is pure rolling.

These eleven robberies and killings have made them fat.

Although the efficiency of these people who intercepted them to dig cosmic crystals is very low, the eleven teams together also have 364585 cubic cosmic crystals. Maybe they have successfully robbed and killed other teams before?

In fact, 99% of the cosmic crystals in the "boundary in the boundary" are in the core area. These cosmic crystals cannot be excavated, because these cosmic crystals are the foundation of the world. As long as they are excavated, the world will collapse.

After eleven robberies and killings, Guo Lingfeng and his team have all upgraded their equipment. Before, they were still wearing C5 level force clothes, which has been replaced by D1 level. The force weapons used by Hong and Thor were only level C3, but now they have been upgraded to level D1.

When they came to the central area, explorers from all forces gathered together.

Now all the major forces are in groups. As long as they are not the people of the two holy places, the four organizations and several families, even if you can get more treasures, it is useless, because as long as you go out from the entrance of the "middle world", you will be intercepted. Therefore, now all free explorers have chosen one major force to join.

"Three axe mountain" sent too few people to participate in the assessment of trainee mercenaries this time. Guo Lingfeng and they had to temporarily join the camp of "Beilong city".

There are 2 million forces outside. Once they enter, all the people in the "world in the world" are brothers.

Their only advantage is that they come in early. They can make a profit before the 2 million troops outside. In fact, they have dug a lot of cosmic crystals.

Even if they can't get anything later, these cosmic crystals alone are not a small fortune.

Of course, this is for ordinary explorers.

For Guo Lingfeng, his advantage is too great in the "world in the world" at the moment!