Chu Xingyun held the Sword of the Sky and came to the small lake.

Hold your breath and concentrate.

A trace of pure spiritual power was emitting and completely integrated into the Sword of the Sword, causing the Sword of the Sword of the Sword to begin to tremble slightly, as if it was slowly accumulating.

Not long after, Chu Xingyun's slightly closed eyes suddenly opened, and with a sword, a sharp wind blade burst out from the sword of the Sky, and it penetrated into the lake with lightning speed.

Rumble!

A muffled sound broke out, and the lake was divided into two sections by the Killing Wind Blade. At the break, you can clearly see the bottom of the lake.

"What a strong power." Chu Xingyun's expression was slightly stern. With his current strength, he could only barely exert 50% of the power of the Sky-Slaying Wind Blade, but even so, the lethality of this Wind Blade is still strong and can easily tear the lake water.

According to Chu Xingyun's estimate, this slash is as powerful as the full-strength attack of the third level of the Spirit Gathering Heaven. If the power of the Knife Wind Blade is exerted to the extreme, it can even pose a threat to the powerful people in the Earth Spirit Realm.

However, although the power of the Sky-Slaying Wind Blade is strong, the side effects are also obvious and require extremely large amounts of spiritual power.

Chu Xingyun is now at the seventh level of body tempering. After exerting it once, the spiritual power in his body will be consumed completely. He wants to take a period of rest before he can continue to activate it.

"Huh?" At this moment, Chu Xingyun seemed to have discovered something, and his eyes suddenly frozen.

In his vision, a long crack appeared at the bottom of the lake.

This crack was naturally torn open by the Killing Wind Blade, but if you look closely, you will find that there is an extremely faint light emitted at the edge of the crack.

If Chu Xingyun hadn't had his keen eyes, this light would have been easily ignored.

After the spiritual power in his body recovered a little, Chu Xingyun jumped directly into the lake and came to the place where the crack was.

Through the faint light, he vaguely saw a raised rock from the crack, which was very strange, completely different from the rock at the bottom of the lake, just like a man-made place.

Chu Xingyun stretched out his hand and tapped on the rock.

In an instant, a roar sound like the mechanism was turned on, and the entire lake began to tremble wildly, and countless splashes rolled and even splashed.

Then, under Chu Xingyun's surprised gaze, with him as the center, the lake water on both sides was scattered and opened. A secret passage appeared in front of his vision, which was pitch black and I don't know where to go.

"It's true that there is a mystery here!" Chu Xingyun looked at the secret passage in front of him and took a slight breath.

In the past, he came to this powerful cave and just plundered the things inside at will, without too much investigation.

Besides, even if he carefully investigated it, he would probably not find this secret passage. Who would have thought that such a lake that looked inconspicuous was actually hidden under the lake.

Stepping into the secret passage, the walls on both sides were inlaid with luminous beads, which were emitting a slight luminous light.

In addition to the light, Chu Xingyun also felt a thick breath that directly pressed on his body, as if he was deliberately blocking him and preventing him from moving forward.

But the more strange and unpredictable it became, the more interested Chu Xingyun became and couldn't help but speed up his pace.

When we arrived at the end of the secret passage, two huge stone doors appeared in front of us. On the stone door, there were strange lines carved, faintly, as if they formed an obscure pattern. The thick aura emanated from this pattern.

"Nine Yuan Hungang Formation!"

Chu Xingyun's pupils suddenly shrank, and he looked at the pattern in front of him in disbelief, and even wiped his own eyes, confirming that he was not hallucinating.

The Nine Yuan Hungang Formation is extremely famous and is a level 8 spiritual formation.

As long as this formation is set up, any place covered by the formation will become solid. Even a strong man at the Martial Emperor level will take three days and three nights to force it to break.

Chu Xingyun had encountered this spiritual array and was deeply impressed by it, so he recognized it at a glance.

But he never thought that he would encounter this shocking spiritual formation again in a remote place like Xifeng City.

"It's strange. I have carefully searched the entire cave. In my judgment, the owner of this cave is not very strong, and it is impossible to set up a level 8 spiritual array."

Chu Xingyun looked around carefully and found that the stone walls on both sides were made of extremely strong gold and jade, but the stone walls in the distance were the most ordinary Qinghua stone.

"I understand!" Chu Xingyun's mouth raised a smile of enlightenment, and finally figured it out.

According to his speculation, the stone gate in front of him should have existed for thousands of years.

When the owner of the cave accidentally discovered the stone gate, he also felt the extraordinaryness of the stone gate. In order to take it for himself, he simply built a cave to completely hide the stone gate.

The ancient characters appearing on the cave walls are very likely to be related to this stone door!

"The owner of this cave is a bit thoughtful. If I hadn't accidentally discovered the mystery at the bottom of the lake, no matter how much I searched, I would not have been able to find it." Chu Xingyun sighed slightly.

He slowly walked to the stone gate and used his spiritual power to cover the Nine Yuan Hungang Formation on the stone gate.

After thousands of years, the aura of the formation above was already very weak, and almost all the formation eyes had been destroyed. If it were in its heyday, Chu Xingyun would have been shaken away by the Jiuyuan Hungang Formation before he even stepped into the secret passage.

It took half an hour to open the stone door from a broken array eye, and a long passage appeared in front of him, leading directly to the ground.

This time, Chu Xingyun became cautious. He found that the walls on both sides of the passage were carved with dense ancient characters, which were very similar to those outside the cave, which proved that his previous speculation was correct.

Walking down the passage, the road was not long, and soon we came to a wide flat land, empty and nothing, but in the middle of the flat land, there was a building similar to an altar.

On both sides of the altar, two huge stone pillars stand, carved with mountains, rivers and beasts. Each one is so lifelike, ferocious and domineering, as if there are really hundreds of beasts living here.

As for the center of the altar, an oval jade is suspended, about the size of an adult's head, crystal clear all over, and vaguely exudes pure spiritual energy.

Chu Xingyun looked at the jade deeply.

In addition to spiritual energy, he also keenly captured a trace of vitality, which was very weak, but it really existed.

"Can this jade be the egg of some kind of spiritual beast?" Chu Xingyun murmured to himself, and then a ray of splendor suddenly burst out from his eyes, and he could no longer suppress the surprise in his heart.
Chapter completed!