Pi Valley.

Although the pillar of light had disappeared, the moment it rose to the sky, it shook the entire Mangbeast Mountain Range, and those shocked demon beasts were still in turmoil and chaos.

Chu Yuan and Qin Xian'er galloped all the way, encountering more than a dozen waves of sneak attacks and attacks from demon beasts.

It's just that in order to get to the destination as soon as possible, they avoided all the attacks they could avoid, and they were really forced to kill the demon beast.

It took about half an hour for the two of them to finally come to the valley where the pillar of light burst out.

It seemed that under the impact of some kind of energy, the valley at this time had been destroyed and disheveled, the trees were broken, the ground collapsed, and there were rifts hundreds of meters away everywhere.

And in that valley, a huge crater with a diameter of tens of meters is particularly eye-catching!

Chu Yuan stared at it, and when his gaze swept towards the collapsed pothole, he suddenly quickly moved forward a hundred meters.

Then, a look of horror appeared on his face.

I saw that the huge pothole, which ran straight through the ground, was as deep as a hundred meters, like an abyss!

And at the end of the abyss, there was a hollow world, with the help of the bright light flickering underground, Chu Yuan vaguely saw a ruined building, accompanied by the flow of air, an ancient breath came to his face.

Qin Xian'er's beautiful eyes flickered, and her pretty face also showed a look of surprise.

When she first saw the pillar of light, she guessed what kind of ruins should be in the world, but she didn't expect it to be an underground palace buried hundreds of meters underground!

And judging from the quaint aura released from the pit, this mysterious underground palace has existed for some years, and has been buried for at least three hundred years!

Buzzing!!

At this moment, Chu Yuan suddenly felt the throbbing of the dragon pattern on his chest, which became even stronger, as if something was calling him, and the source was within this abyss that was a hundred meters deep.

Sensing the strangeness coming from the dragon pattern, Chu Yuan's eyes narrowed slightly, and the surging spiritual power suddenly spread out, like a net from heaven and earth, invading the pit.

However, to Chu Yuan's surprise, the spiritual power he released seemed to have encountered an invisible wall, and no matter how much he strengthened his spiritual power attack, he couldn't penetrate the hole!

Qin Xian'er saw that Chu Yuan's face was a little strange and ugly, and then her eyebrows frowned slightly, and asked, "What's wrong?"

After trying again and not being able to penetrate the invisible wall, Chu Yuan withdrew his spiritual power and said, "Xian'er, you use your spiritual power to see if you can penetrate that pit." ”

Hearing this, Qin Xian'er's mind moved, and a powerful spiritual power roared out and slammed into the entrance of the cave.

However, just like what happened to Chu Yuan, her spiritual power was as if it had hit a wall, and she couldn't take any further steps.

"No, there seems to be some energy there, blocking the prying eyes of mental power. Qin Xian'er retracted her spiritual power and said.

Chu Yuan nodded, and then his big hand suddenly burst out with a strong suction, sucking a palm-sized stone into his hand, and then threw it towards the hole.

This time, the stone was not hindered by some kind of force like the spiritual power.

Instead, it easily and unhindered through the cave, and then slammed into the ground with a 'thump' sound that reverberated endlessly.

"This guy is very thoughtful. ”

Qin Xian'er's beautiful eyes flashed with brilliance, and she understood the purpose of Chu Yuan's move at a glance, he was testing whether there was a hidden mechanism at the entrance of the cave.

"I think this cave should have been set up with some kind of formation to isolate the snooping of spiritual power, and for the time being, there should be no danger from going underground from this place. Chu Yuan explained.

If there was a hidden mechanism in this pit that went straight to the ground, the stones would have been stirred into pieces long ago, or they would have collided in the middle of the way, and it would have been impossible to fall steadily into the ground, let alone hear the sound of the stones.

"Xian'er, let's go down and have a look. ”

Chu Yuan's eyes were a little hot, and he smiled: "While no one has arrived here yet, as the first person to eat crabs, the biggest benefits of the underground palace are all ours!"

Although I still don't know the origin of this underground palace.

But with his keen perception and years of experience, Chu Yuandi had an intuition that this underground palace was not simple! There must be many strange treasures, exercises, elixirs, and so on!

Of course, these are not the reasons why Chu Yuan insists on going down, although the baby is attractive, he is more curious and values the thing that is constantly calling him.

Also, he wants to solve a puzzle in his heart.

It stands to reason that such a movement in the world of the strange treasure will definitely attract countless demon beasts! But why can't a single demon beast be seen in this vicinity?

"Hmm. Qin Xian'er nodded slightly.

Although she didn't need any spiritual treasure elixir cultivation, she was obviously very interested in this palace.

What kind of power is this palace?

Why is it buried underground for hundreds of years?

What was that pillar of light? Was it a strange treasure, or was something breaking through the seal?

"This hole should be fine, let's be careful when we go down. Chu Yuan said.

This ancient palace, which on the surface looks peaceful, does not seem to be in any danger.

But after all, palaces also exist for hundreds of years, and the more peaceful a place like this, the more careful you must beware!

Because often many warriors who break into the ruins relax their vigilance because they are invisibly guided, and finally die tragically on the way to seize the treasure.

"Xian'er, it's up to you next. Chu Yuan looked at Qin Xian'er and said, this abyss pit is a hundred meters high, and if he jumps directly with the cultivation of his Law Spirit Eight Heavens, he will definitely turn into slag.

And Qin Xian'er had already mastered the ability to fly in the sky, and this altitude was nothing to her, even if she was carrying a person, there was no danger.

The jade hand grabbed Chu Yuan's shoulder, Qin Xian'er's pretty face was slightly red, but she didn't think too much, she just turned her head slightly, jumped over, and jumped into the abyss with Chu Yuan.

Soon, the two of them landed firmly underground.

At this time, a huge underground world appeared in front of the two of them.

Chu Yuan looked at this shocking scene, his expression was extremely surprised, when he came down from the ground, he saw the whole picture of this underground world clearly.

According to a rough estimate, this underground palace is almost the size of a Great Yan County!

In other words, in order to build this palace, a space the size of Da Yan County was hollowed out a hundred meters underground in the Mangbeast Mountain Range!

Although Chu Yuan had seen a scene that was a hundred times more magnificent than it in his previous life, the scene in front of him still made him feel a little surprised, to hollow out such a huge space underground out of thin air, it was not something ordinary people could do!

......

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