Yang Tian kept swinging the Black Devouring Knife in his hand, and although the rock in front of him was hard, it could still be slowly shattered with Yang Tian's strength.

"Ding!"

After an hour, the mountain range in front of Yang Tian was still completely black, almost the same color as the Black Silent Stone, but Yang Tian's Black Devouring Knife swung on it, but it made a crisp sound.

"This is not the Black Silent Stone!", Yang Tian thought in his heart, waved the Black Devouring Knife in his hand, and slashed at it again.

"Ding!"

With the same crisp sound, the black unknown object in front of him did not change in the slightest except that the sound could be heard. There were also no powder debris dropping.

"My attack power has reached the peak of the Emperor Realm, but I can't shake a trace of this black silent stone at all?"

Yang Tian frowned, flew to other places again, and then smashed the rock in front of him.

Time flies, and twenty days have passed in the blink of an eye.

In the past twenty days, Yang Tian has been digging continuously, and those unknown black substances have gradually appeared.

What appeared in front of Yang Tian's eyes was an area of ten square meters, which was black throughout, but Yang Tian couldn't shake it in the slightest.

The Black Devouring Knife struck it with a crisp sound, but it couldn't break it.

"It's been twenty days, and this black area shows just a little. There is also a large area that blocks out small light, which should be similar to this black wall. Yang Tian looked at it carefully.

"Keep digging!"

Yang Tian did not hesitate and continued to swing the Black Devouring Knife in his hand.

......

At this time, the number of Emperor Realm powerhouses outside the Black Silence Stone Mountain Range was even larger, and all the clans were united together, so that if they obtained the Gray Rough Stone, they would not be jointly attacked by other powerhouses. You can calmly leave through the spatial coordinates.

Time flies, and more than four months have passed.

"The Demon Clan's Yuan Yu Emperor finally escaped with that gray rough stone. ”

"In half a year, there are so many powerhouses in the Imperial Realm, but none of them can find one again. ”

"It's too difficult, this mountain range is too huge, who knows where those gray rough stones are hidden?"

......

In half a year, a lot of things have happened, and there are still more than 300,000 Emperor Realm powerhouses in this Black Silent Stone Mountain Range at this time.

In fact, there are more than so many people, but many Emperor Realm powerhouses left after digging for some time.

"In half a year, many Emperor Realm powerhouses of our human race have excavated such a large area, but they have not found a second gray rough stone. ", in one area, an Emperor Realm powerhouse said.

"I'm not ready to dig anymore. I'll be gone in a month. ", said another Emperor Realm powerhouse.

"Boom!"

As soon as the words of this Emperor Realm powerhouse fell, an incomparably loud sound came, and the entire Black Silent Stone Mountain Range trembled violently, and the mountain range was rapidly cracking.

These Emperor Realm powerhouses were startled, and immediately flew into the air, away from the Black Silent Stone Mountain Range, and stopped in mid-air, watching the movement below.

"What's going on?"

"Why is this mountain range cracking?"

"This Black Silence Stone is extremely hard, even a peak Emperor Realm powerhouse can hardly destroy this mountain range. Who can make it crack?"

......

Many Emperor Realm powerhouses looked at the constantly cracking Black Silent Stone Mountain Range, and a trace of shock appeared in their eyes.

They dug for a long time and knew how hard the rocks of this mountain range were.

......

The Black Silence Mountains shook, but in one area of it, they were completely cracked, and then some black gradually appeared, directly through the cracks.

"What is that?", countless Emperor Realm lord-level powerhouses instantly discovered the movement in the crack, and a trace of shock appeared in their eyes.

Some blacks appeared, rising, and then increasing, gradually revealing their appearance in front of everyone.

In the end, everyone was stunned and looked ahead with blank eyes.

In the Black Silent Stone Mountains Sky China, a huge black palace appeared, the length of which reached tens of millions of kilometers and the width of which reached millions of kilometers.

"Is that a palace coming out of the mountains?"

There was a trace of horror in the eyes of all the Emperor Realm powerhouses, and then their faces were full of excitement.

The Void Battlefield Nuclear Mystery Realm has many ruins, and what appears in front of them is undoubtedly a newly born and unknown ruins.

"New ruins have appeared!"

Airplanes...

A strange wave came from the black palace, and then the palace door was slowly opened.

Many Emperor Realm powerhouses glanced at each other, but no one dared to go first.

"Whew!"

After all, there was a bold Emperor Realm powerhouse, and a second later, a high-level Emperor Realm powerhouse of the Demon Clan rushed directly into the palace. His figure disappeared in front of everyone's eyes in an instant.

After another second, many demon clan powerhouses all flew towards the palace gate.

"There is no danger inside the Black Palace. ”

The powerhouses of the Imperial Realm of other races obviously easily judged the reality of this palace.

If there is danger, the powerhouse of the demon clan will definitely not enter.

"Let's go!"

"This mountain range has gray rough stones, and maybe there are other precious treasures. ”

......

Tens of thousands of Emperor Realm powerhouses all flew in.

The powerhouses of the demon clan were the first to fly into the palace, and what greeted them was a huge regional field, but at this time, the venue was the first to stand.

"Human Lightspeed Emperor!"

In an instant, there were many demon clan powerhouses who recognized Yang Tian. In the Nuclear Xuan Realm, there are less than a thousand people with the speed of light, and each of them is known to many Emperor Realm powerhouses.

"Silver Fox Emperor, how could the Human Lightspeed Emperor be here?", the other Emperor Realm powerhouses asked.

The Silver Fox Emperor was the first to enter the palace as a high-level emperor realm powerhouse of the demon clan.

"I don't know. When I entered, the Lightspeed Emperor had already entered it. ", said the Silver Fox Emperor.

At this time, the powerhouses of the Emperor Realm of the other races also flew in. They also saw Yang Tian.

"The Emperor of Light!", many alien races were extremely cautious about Yang Tian, but the Emperor Realm powerhouse of the human race was greeting Yang Tian with a smile.

The Emperor of Light Speed is also a member of the powerhouse of the human race, whether he belongs to the Human Emperor Realm Alliance or not, he belongs to the human race.

"What is this place?"

"Where's the treasure?"

"Isn't this a ruin?"

......

Many Emperor Realm powerhouses looked at the inside of the palace, but there was nothing here.

Airplanes...

Suddenly, an incomparably mysterious fluctuation came, and many points of light appeared in the center of the palace. Then, these points of light slowly condensed together, but they formed a translucent figure.

This is an old man with a pale face, with one eye and a height of thousands of meters.

"The breath on your body is strange. The old man glanced at everyone, but a voice came out directly.