With the large-scale airborne landing of North American troops, it can be said that there is nothing wrong with Xu Shaotang.

After the follow-up troops arrived one after another, they left the Antarctic continent in a Chinese icebreaker. Before they left, they taught the commander of North America a lesson by the way, which was a relief for their bombing.

After returning to Huaxia, Long Fei was sent to the hospital by the medical staff who had been waiting at the airport. After Xu Shaotang got three pieces of keys, he drove to Shennong mountain with mu Tiance by helicopter.

Although it has been several years since the last visit to Shennong mountain, the marks left by Xu Shaotang and the wine maniac are still vaguely recognizable. Along the marks left by them, Xu Shaotang and mu Tiance finally arrive at the valley.

"Is this the vestige of prehistoric civilization?" Mu Tiance looked around at the land with birds singing and flowers fragrance in front of him. He was slightly surprised.

In his view, the place where there are traces of prehistoric civilization must be a barren land, but it is very different from what he imagined. It is not like the traces of prehistoric civilization at all, but more like a paradise.

Xu Shaotang nodded and jumped first. Soon, mu Tiance jumped with him.

"Do you know what tree it is?" Xu Shaotang asked mu Tiance with a smile.

"I don't know." Mu Tiance asked, "do you know?"

"Of course!" Xu Shaotang nodded and said, "that's the dragon blood tree!"

Seeing the scene in front of him, Xu Shaotang can't help but think of the scene he was looking for with a drunken maniac. Now everything here is the same, but it has long been a matter of right and wrong.

He would like to know what is in this relic. He would take all the secrets in this relic to the grave of the drunken maniac to solve the mystery in his heart.

After taking two pieces of keys from mu Tiance, Xu Shaotang slowly comes to the stone wall, sweeps away the moss on the circular keyhole, and puts five pieces of keys into the keyhole in turn.

"Click!"

With the combination of five pieces of key fragments, a complete key appears in front of Xu Shaotang. The circular keyhole inlaid with the key turns slightly. Then, the five pieces of key suddenly fall into the keyhole and contact with the keyhole without any gap.

"Be careful!" Xu Shaotang looked at mu Tiance and said, "the ruins should be opened. Let's not turn over the boat in the sewer."

Since the people of prehistoric civilization left the key to open this relic, this relic must be very important. In such an important relic, according to the level of science and technology possessed by prehistoric civilization, it is not surprising to see what kind of monsters appeared.

Mu Tiance didn't answer Xu Shaotang's question. He just stares at the lock hole with his eyes. Now it's completely sunken. It seems impossible to take out five pieces of key again.

As time goes by, although the time is not very long, the two waiting people feel extremely long. They can't wait to know what kind of secret is hidden in the ruins, and whether we can find the reason for the sudden disappearance of prehistoric literature from the ruins.

"Boom..."

All of a sudden, the surrounding earth shakes, and then the water in the pool in the middle of the valley suddenly drops at a very fast speed. In the blink of an eye, it has dropped several meters deep.

Around the small lake, a few stone mounds suddenly appear. The stone mounds are distributed around the small lake, which seems to protect the safety of the small lake.

"What's that?" Mu Tiance points to the abrupt stone pier and asks Xu Shaotang curiously.

Xu Shaotang thought about it and said, "it should be infrasonic weapon."

He still remembers the scene when he first came here. The scene of countless birds turning into meat directly in the sky constantly appeared in his mind and constantly reminded him of the danger here. Even though he is now a master of alchemy, he still doesn't think he can survive the attack of infrasonic weapons.

Mu Tiance didn't ask Xu Shaotang what infrasonic weapon is. He just slowly approached the stone pier. His steps were also extremely careful. It can be seen that he was full of vigilance here.

Close to the edge of the small lake, there is no danger in their imagination, and the small lake may now be more aptly described as a deep pit.

They carefully looked down from the edge of the pit. It was dark under the pit, and they couldn't see it at all. From time to time, there was a "buzzing" sound. They didn't know whether it was the wind or other sounds, but it gave people a sense of horror.

"Go down and have a look?" Mu Tiance restrained his excitement and asked Xu Shaotang tentatively.

"I've come to this point. How can I be reconciled if I don't go and have a look?" Xu Shaotang nodded and said, "let's go down at intervals. Once one person is in danger, another person can help each other in time."

In the face of prehistoric civilization full of mystery, you can't be too careful. No one knows what will happen next. It's better not to put eggs in one basket."I'll go down first!" Mu Tiance can't wait to say.

"Forget it, I'll go down first!" "Xu Tang is a little more familiar with you than I am

Just as they were discussing who would go first, the earth under their feet trembled again, and a terrible roar came out of the pit, as if some prehistoric beast was coming out of the ground.

Two people quickly back, full of alert looking at the hole, the whole body of Qi has been running, ready to deal with the sudden situation at any time.

The tremor of the earth is more intense, the two people's bodies are constantly shaking, and their faces are more and more serious. They know that the thing coming out of the ground is about to appear!

Just when they thought that something terrible was going to be drilled out of the ground, a ball suddenly appeared in front of them. The size of the ball was almost the same as that of the deep pit. It was as big as two football fields. The outside of the ball was covered with metallic luster, so it floated quietly in front of Xu Shaotang and mu Tiance.

"This..." Mu Tiance looked at the ball in front of him in surprise. They thought that what they were going to rush out would be a monster. Unexpectedly, it was a huge ball.

Xu Shaotang also looked at the ball floating in the air in surprise. There was no power facilities outside the ball, just like a balloon. He really couldn't understand how the ball, which looked like a metal ball, floated in the air.