After Cheng Yang came out of the tower of soul, he did not directly attack the spirits around him. Instead, he brought over the black warrior who had only his trunk and used soul extraction.

With a wisp of soul into Cheng Yang's mind, the Black Warrior's memory is also copied by Cheng Yang. But let Cheng Yang incomparably shocked things happened, the Black Warrior in the soul of the whole black skull after the soul of the fire directly dissipated.

Cheng Yang couldn't explain this. He thought it was a special case of the Black Warrior, but then he caught a weak undead. After using soul extraction again, the other side also died.

This shows that soul extraction is not omnipotent. It may only be effective for life races, but can't control the undead through soul extraction.

As for the deep reason, Cheng Yang doesn't know. Maybe the gods can know all this.

However, Cheng Yang did not get nothing. The Black Warrior's complex memory contains too many things, including the so-called ceremony in the Black Warrior's mouth.

"This group of dead people is really cruel. They are willing to bury tens of millions of dead people for this ceremony!" Cheng Yang's expression was extremely serious, but what made him rather puzzled was that he did not find more information about the ceremony from the memory of the Black Warrior, especially what the ultimate purpose of the ceremony was.

It has to be said that the secret work of the undead clan is really excellent. Even the top five level dead people don't know what the ultimate purpose of the ceremony is. We can imagine how cautious the emperor is.

This ceremony is really very important. In addition to burying tens of thousands of dead people, it also needs the blood of tens of millions of living creatures. In order to carry out this ceremony, nine dead masters above the sixth level must preside over the ceremony.

If such a ceremony is not enough against the sky, Cheng Yang doesn't know what kind of ceremony is powerful.

At this moment, Cheng Yang finally understood why the undead didn't send experts to directly break the defense lines of the American united forces. They wanted to build the Panama Canal into a huge battlefield, a meat grinder type battlefield.

Obviously, the undead have been able to control the rhythm of the war, allowing the human side to constantly put in its forces and consume them on the battlefield.

The same is true of the undead, except that they do not send real experts to participate. They are all skeleton soldiers at the early stage of the third level of the cannon fodder, and occasionally send the fourth level undead army, which is also a sitting posture. Once they are attacked by each other's madness, these elite soldiers will immediately withdraw back.

To Cheng Yang's dismay, the casualties on both sides of the battlefield have reached millions. I'm afraid it is not far from the completion ceremony.

Cheng Yang's idea just started, and suddenly a thick cloud appeared in the sky, covering the sky for tens of kilometers.

On the ground, a continuous stream of black breath out, into the dark clouds in the air.

"What's going on?" Cheng Yang was shocked. It was obviously not the change of natural climate, "is it so coincidental? Just as the ceremony of the dead is finished? "

Cheng Yang naturally did not know that in the previous battles of the undead, 99% of the preconditions for the ceremony had been completed, only the spirit energy of the undead was slightly insufficient.

Just in the short time just now, the magic illusion and a group of archers killed a large number of masters of the undead clan. The souls of these undead masters were absolutely equal to hundreds of thousands of ordinary undead. Therefore, they immediately made up for the part of soul energy missing in the ceremony.

"Lord, the situation is not very good!" Xu Wu rushes to Cheng Yang quickly. As a guard of territory from the other world, Xu Wu's insight is definitely much stronger than the people who came again.

Cheng Yang immediately asked, "do you know what's going on?"

Xu Wu said: "this seems to be the super secret of the undead, the territory of death."

"What is the territory of death?" Cheng Yang became more confused.

While they were talking, the black smell on the ground was becoming less and less, and it seemed that they were all integrated into the dark clouds in the sky.

"Lord, let's go first, or it will be too late." Xu Wu drank a lot, and his face was extremely anxious. He seemed to see something extremely terrible.

"All right, you go first!" Cheng Yang made a quick decision. He believed that Xu Wu could not cheat him at this time.

Around the undead also saw the changes around, a roar from the soul resounded through the heaven and earth, as if celebrating this historical moment.

Hearing Cheng Yang's instructions, all archers dare not have the slightest hesitation. They quickly jump into the transmission array disk and disappear quickly from the original place.

After the last Archer left, Cheng Yang immediately put away the transmission array disk, and then used Guiyuan secret technique to counteract the side effects of ablation skill on the body, and then his body liquefied and melted into the ground.

Less than a few seconds after Cheng Yang disappeared, the black smell on the ground completely disappeared, and the dark clouds in the sky had completely turned into paint black, and much larger than before.

Then, the dark clouds began to roll up, bursts of black rain fell from the air, the black raindrops on the ground actually eroded the earth and stone on the ground, the soil quickly turned to paint black, and the stone became crushed on the spot.As for the original dead trees and plants on the ground, they are turned into ashes.

On the contrary, it is the undead. After their bodies are covered with black rain, the black rain does not corrode them at all. Instead, it integrates into their bones, making their whole body more powerful and strong.

What's more strange is that these black rain fell in the area south of the Yellow Spring River, even the stone beam did not fall a drop of black rain.

Then, the black clouds in the sky gradually grew bigger and swept towards the south. The black rain also fell on every corner of the southern land, and the whole land changed. Even some mountain tops were directly flattened because of the corrosion of the black rain.

With the black rain, the dark ground slowly out of the black fog, in the hundreds of meters above the ground condensation does not disperse, and presents a growing trend.

Cheng Yang is still hiding under the ground at the moment. The corrosive black rain has not had a great impact on him, but the change in front of him has brought a strong shock to his soul.

This could not be described by magic. He could see clearly that according to the posture of the black cloud in the sky, it was estimated that the area would not be eroded by thousands of kilometers and would not stop at all.

But what Cheng Yang didn't understand was that since the power of the black fog was so powerful, why did it only fall to the south of the yellow spring river? If the rain falls on the human side for a few minutes, there will be no need to fight the fortress on the opposite side, and all the people inside will become dead bones.

If you don't understand Cheng Yang, you don't want to think about it. At the moment, the undead has not continued to attack the city. The dark clouds in the air have already floated to tens of kilometers away, so there is no need for him to continue to stay here.

Cheng Yang crossed the Yellow River and returned to his own station.

At the moment, the barracks here have been set up, but the soldiers are not staying in the barracks. On the contrary, they are lining up to fight, as if a war is coming.

However, Cheng Yang knows that the reason why they are so nervous now is just because of the strange phenomenon just now. For most ordinary war personnel, the scene just now was too frightening.

"Lord, you are back." When Xu Wu saw Cheng Yang appear in front of him, his tense look suddenly dissipated a lot.

Cheng Yang SA ran a smile, way: "you also too despise me? Just a little bit of rain will keep me? "

Xu Wu said with a wry smile: "Lord, you don't know. The death territory is absolutely a taboo secret skill of the undead. Even ordinary gods can't perform it alone. It's a huge disaster for living species. "

"You can tell me what the territory of death is." Cheng Yang asked.

At this time, Xu Wu said: "my subordinates have seen it in a book collection of the family before. In the living space of the undead, the ground is covered with dead air, and there is no vitality at all. Even the air is full of dead air. Even if the living people come to the world of the dead, they will be infected by the dead in a few days. When a new land is occupied by the dead, the people of the dead will carry out this sacrifice ceremony called the territory of the dead. They will transform the newly occupied world with the souls of countless living creatures and the dead spirit of the dead, so that it can completely become a world suitable for the survival of the dead. "

"Do you mean that the undead intend to turn the whole of South America into a dead land?" Cheng Yang's face suddenly changed. If this is the case, I'm afraid that even if human beings recapture South America in the future, it will be meaningless.

Xu Wu nodded and said, "it's true."

"But what good is this for the dead? Why are they in a hurry to transform South America? " The doubts in Cheng Yang's heart have not been solved.

Xu Wu said: "the territory of death is of great benefit to the undead. Firstly, the undead can play a stronger fighting power in the territory of death. Secondly, the stillness in the territory of death can make the undead evolve faster. Finally, and most importantly, once death territory appears in one world, the soul power of people in this world will naturally converge In the territory of death, new undead are finally bred. This kind of undead has a strong randomness. It may be the lowest level skeleton soldier, or it may be the most powerful race bone dragon among the undead. A fully formed bone dragon has at least six levels of late strength, which will be incomparable for the whole undead clan. "

After hearing this, Cheng Yang was shocked and said, "how can we directly nurture the existence of the sixth order? Is that too bad? How can the gods allow such a rule to exist? "

Xu Wu said with a wry smile, "I just saw it from ancient books. I'm not sure whether it's true or not. However, even if there is no way to directly nurture the existence of level 6, just the combat effectiveness bonus and evolution speed bonus of death territory to the undead are enough to let the undead venture to start this ritual. "