At this time, Mu Yun and Concubine Mo Xuan became more and more fierce in fighting.

Mu Yun also discovered that after Concubine Demon Xuan reached the first level of the Fatian Realm, he was several times stronger, and his temperament seemed to have been greatly improved and surpassed.

For a moment, he could not take over Concubine Demon Xuan.

The two of them fought like this and became more and more violent.

Dozens of dominant realms are in this vast underground world, and they are also taking unscrupulous actions.

Gradually, cracks began to appear on the ground... Before everyone noticed it, cracks appeared everywhere in the entire underground world, and eventually, these cracks spread out and instantly surrounded like a net, collapsed above and cracked below.

The rumbling sound kept ringing.

"Yun Mu!"

Wu Xinyao shouted loudly at this moment.

"Miss!"

Over there, the warriors of the Heavenly Demon Sect also changed their faces.

The battle between Mu Yun and Concubine Mo Xuan was heading towards the depths.

At this time, the earth collapsed and fell over the sky, wrapping the bodies of the two people and disappearing.

At this time, everyone could only leave the outside world along the way.

"Damn it."

Wu Yuanhan also cursed in a low voice at this time.

The huge rocks that fell completely collapsed the underground world and everything disappeared.

Mu Yun and Concubine Mo Xuan could not see them at all.

Wu Xinyao walked forward at this time and punched the stone pestle.

However, a shocking scene was discovered.

The stone pestle does not move at this time.

Wu Xinyao was stunned. After checking carefully, her face changed and she said, "This is not an ordinary stone, it is the Fire Refining Yuan Stone."

Fire Refining Yuan Stone is an ordinary stone formed by roasting the source fire.

This kind of fire refining Yuan stone, in terms of its hardness, even the dominant realm cannot do anything.

"Damn it!"

Wu Xinyao looked at the Tianmo Sect and snorted, "You are satisfied now. Yun Mu is gone, your ladies are gone. If you want to die, they will die together."

The elder Mo Xuan from the Heavenly Demon Sect looked ugly.

The Heavenly Demon Sect is located in the Tianyan Realm.

Everyone knows that Mo Youlin, the young master of the Heavenly Demon Sect, has outstanding talent and will take over the great task of the Sect Master Mo Yunting in the future.

But in fact, Concubine Mo Xuan is more talented than her brother Mo Youlin.

If the lady dies here... then he is dead! But at present, the entire underground world is completely covered.

Can't get in! Don't talk about it.

What should I do?

Rumble... roaring sounds kept ringing at this time.

It seems that the inside is still collapsing.

At this time, the underground world is indeed constantly collapsed.

As the collapse began, Mu Yun hid directly into the depths.

The same is true for Concubine Demon Xuan.

The two of them ran together, and at this time they didn't care about who was attacking whom.

But behind, the top and ground above the sky began to collapse and stones fell.

Concubine Demon Xuan accidentally got hit by a stone, and a mouthful of blood was spurted out, but the stone did not break.

This is the realm of the Heavenly Destroyment! If an ordinary stone is smashed, it is impossible to cause any injuries.

It can only be said that those stones are not simple.

Mu Yun was even more careful at this time.

The two fled to death.

Finally, it seemed that it had arrived at the end of the underground world, a wall.

The stone walls are smooth and glow with a faint blue light.

It seems to be...the thunder sky.

Again?

Mu Yun's eyes changed.

He had entered such a place before, but there was no way to go to the earth.

Now, there is another one! What happened to the Lei Emperor back then? How come there are such places everywhere in the secret land.

But... if you don't go in, you will be completely buried by a huge rock.

Enter, how to get out?

Seeing the huge rocks approaching, Mu Yun had no time to think.

Enter! The buzzing reputation sounded, Mu Yun's figure disappeared in front of the sky.

When Concubine Demon Xuan saw this scene, her pretty face turned pale and hurriedly followed.

Two figures disappeared into the underground world.

And the underground world is completely covered at this time.

Behind the sky.

At first glance, it is a space that has been opened up.

There are mountains, water, trees and flowers.

Very quiet.

It is not like Mu Yun entered before, there are thunder beasts everywhere.

At this moment, Mu Yun also took a breath.

Concubine Demon Xuan immediately swallowed a pill and digested it.

"You said, should I kill you now, or should I give you that first and then kill you?"

Mu Yun looked at Concubine Demon Xuan at this time and snorted.

Hearing this, Concubine Demon Xuan's face immediately tightened.

She was hit by a huge rock just now, causing her to be seriously injured. If Mu Yun tried his best to kill her... maybe she could do it.

"You can kill me now."

Concubine Demon Xuan said, "But if you kill me now, you can't get out of here by yourself, wouldn't you be alone and end up here?"

Upon hearing this, Mu Yun grinned and chuckled.

"I'm not afraid of loneliness. At most, I can practice here until I can leave here!"

Concubine Demon Xuan's face turned cold.

"You want to kill me, yes, but be prepared to kill a thousand enemies and destroy yourself by 800."

Twenty-four dagger lights appeared again around Concubine Demon Xuan.

At this time, the situation between the two was subtle.

Soon, Mu Yun stood up and looked behind him.

This is the edge of the secret realm here, and a curtain descends from the sky.

Mu Yun poked his palm out, and thunder broke out in the curtain.

Soon, Mu Yun turned back.

"This is surrounded by formations."

Mu Yun said directly: "I can't get out."

"But, I'm not going to be out for the rest of my life."

Concubine Demon Xuan looked at Mu Yun at this time, always cautious and careful.

At this time, Mu Yun sat down, less than ten meters away from Concubine Demon Xuan.

Concubine Mo Xuan was wearing a black skirt and sat on the ground, with a slightly pale face, but she looked a little charming and charming from the thin air.
To be continued...