There was also a walkway at the other end of the room, and Wu Song entered that walkway, and after walking for a long time, he entered a hall.

After seeing the things in the hall, Wu Song couldn't help but let out an exclamation.

In this hall, there are neatly arranged spars. These hedrons are about a man's height, and they are also square in shape, and they are transparent, so you can clearly see what is going on inside.

Inside each hedron, there is a demon beast.

Wu Song walked in the hall, observing the hedrons. It didn't take long for Wu Song to see it.

These hedrons are all set in groups, and each group is four hedrons. Each group of spars is marked with the words A, B, C, D, and so on, so that they are sorted.

Wu Song walked to a group of spars and came to the spars marked with A. The monster in the hedron was a bird, small in size, like an ordinary pofowl, but with a sharp beak and a head that resembled that of an eagle.

Then, Wu Song came to the B-shaped spar again. The monster in that hedron was very similar to the monster in the armor spar, except that it was larger and its two claws became sharper.

The demon beast in the C-shaped spar is larger than the demon beast in the B-shaped spar, and its wings are spread out for a full meter.

Finally, Wu Song came to the T-shaped spar. The demon beast Wu Song inside is very familiar, it is the eagle demon beast he killed before.

Judging from this series of spars, it seems that the current eagle demon beast is transformed from the demon beast in the three spars of A, B and C.

At first, it was a demon beast in the nail spar, then it grew in size little by little, with a sharp beak and sharp claws, and finally, it became the current eagle demon beast.

Wu Song walked to another set of spars, and this time Wu Song started from the T-shaped spar at the very end.

Wu Song, the demon beast in the T-shaped spar, is also very familiar, it is the three-eyed tiger he fought twice before. What is locked in the T-shaped spar is the three-eyed tiger that Wu Song sees now.

After that, Wu Song walked to the C-shaped spar, and the demon beast inside was a little smaller than the three-eyed tiger, and its teeth were not so sharp.

The demon beast in the B-shaped spar is smaller than the demon beast in the T-shaped spar, and its limbs are not so thick.

Finally, there is the Jiazi spar, and the demon beast inside looks like a neighbor's puppy at first glance, and its height is only as high as Wu Song's knees.

Wu Song looked at several sets of spars in a row, all of them were the same, in the original A-shaped spar, there were some small demon beasts, and then in the last T-shaped spar, it was the large demon beasts that are common now.

After reading these spars, Wu Song fell into deep thought.

Judging from these crystals, the current demon beasts are not what they are now, their ancestors are far less vicious and powerful than their current descendants, and they have become what they are now step by step over time.

So the question is, is this change natural or artificial? and at what point?

This underground space was carved out by some kind of force.

The square spar that Wu Song had seen in the previous room earlier was obviously artificially made. That square spar is the root system of those fluorescent aquatic plants in the lake, and those fluorescent aquatic plants support so many demon beasts in the earthly world.

From this square spar, you can see the great power of the maker.

Then there is reason to believe that these spars in the hall were also made by those people, and the demon beasts inside were also put in by them.

Wu Song looked at the spars in front of him, and vaguely felt that this matter had something to do with the ancient races.

It's just that what the relationship is, he can't figure it out for a while.

Wu Song walked around the hall again, and found nothing other than those spars.

He returned to the previous room and walked over to the square hedron.

Wu Song looked at it for a while, and the ghost sent a god, raised his right hand, and stuck it on the square spar.

It was too late, and the square spar suddenly shone brightly, emitting a burst of intense blue light. Wu Song felt a powerful suction force coming from his palm, and he wanted to lift his palm up, but he couldn't do anything.

The palm of the hand is as if it is frozen on it, and it is impossible to lift it at all.

Wu Song urged Yuan Li and lifted the Celestial Elephant Fist, wanting to raise his palm with the divine power of the Celestial Elephant Fist. But it had no effect at all, and Wu Song's palm was still stuck on it.

Strands of blue silk threads stretched from the hedron and wrapped around Wu Song's arm, and climbed all the way up, covering half of his body in the blink of an eye.

Then, a warm feeling was injected into Wu Song's body, and Wu Song felt as if he was floating in a body of water, and his whole body was full of comfort.

This warm feeling flowed into Wu Song's limbs and bones, and finally merged into Wu Song's dantian.

The Yuan Force seed in the dantian became even bigger after absorbing these warm currents. This means that Wu Song's cultivation has taken a step further, from the cultivation in the early stage of the Yuan Seed Realm to the middle stage of the Yuan Seed Realm.

The blue silk thread slowly detached from Wu Song's body, and finally all of them retracted back into the square spar.

Wu Song took a long breath and looked down at his body, with surprise in his eyes. He couldn't believe for a while that he had actually broken through his cultivation just now and entered the middle stage of the Yuan Seed Realm.

But the truth is beyond doubt, Wu Song can clearly feel that the Yuan Force in his body is much more abundant than before.

He used the Yuan Force and launched the second layer of the Divine Blade Shadowless, only to see a Yuan Force long sword turn out of his palm. The Yuanli long sword that Wu Song had turned out before was only more than a foot long, but now it has increased to two feet, which is even sharper.

Wu Song casually swung his long sword, and he made a deep scratch on the ground.

A smile appeared on Wu Song's face, it was true, his cultivation had indeed improved.

Wu Song turned his head to look at the square spar and said to himself, "What the hell is going on? Why do you want to give me Yuan Li to help me improve my cultivation?"

Of course he didn't get an answer, and the square hedron didn't change anything, as if nothing had happened just now.

Wu Song took a turn in this underground space with a full stomach full of doubts. He found nothing other than the square hedrons, and the hedrons in the hall.

Finally, Wu Song returned to the shore where he had first woken up.

Beneath this lake, there should be a hidden passage, through which he could return to the wilderness of the earth.

Wu Song finally glanced back at the cave, he knew that there was a shocking secret hidden here, but now he had no ability to solve it, but it didn't matter, he would definitely come back here again, and all the answers would be clear when the time came.

Wu Song jumped into the water and swam to the bottom, and before he could swim long, Wu Song saw an underwater cave.

He entered the cave, and after swimming twenty or thirty meters, his eyes suddenly opened up and he entered a larger body of water.

There floated aquatic plants that glowed pale blue, and it was the lake that Wu Song was looking for.

Wu Song swam to the surface of the water and climbed ashore.

Counting the time, it should have been a day since he fell here. Wu Song must leave here as soon as possible and return to the ground. Yan Zhan is insidious and cunning, and his cultivation is high, he will definitely enter the top eight in the election for choosing a son-in-law.

As expected, Hua Xing and Li Tian are estimated to have entered.

When the time comes, they and Yan Zhan will fight each other in the competition. With the experience and cultivation of the two of them, they were not Yan Zhan's opponents, and Wu Song was worried that they were in danger.

Wu Song looked overhead, the passage out must be there, and the way to get there, Wu Song had already thought of it before.

He left the lake and went into the wilderness.

It didn't take much effort for Wu Song to find an eagle demon beast. It hovers in the sky and appears to be foraging.

Wu Song climbed to the top of a rock and shouted at the eagle demon beast to attract its attention.

Sure enough, the eagle demon beast quickly discovered Wu Song and rushed down with it. Wu Song waited for the eagle demon beast to rush in front of him, and flashed sideways to the side.

The eagle monster pounced into the air, flapping its wings, trying to fly high again. At this moment, Wu Song jumped up and jumped onto the back of the Eagle Demon Beast, clutching its feathers tightly with both hands.

The eagle demon beast flew upwards while shaking its body frantically, wanting to throw Wu Song down.

Wu Song just grabbed its feathers tightly, no matter how it shook it, he didn't let go.

The eagle monster flew higher and higher, getting closer and closer to the top of the cave. Suddenly, it rolled over and became head-to-foot.

Wu Song didn't expect it to make such a move, and his body left the back of the eagle demon beast, and only one pair of hands was still holding the feathers of the eagle demon beast.

The eagle demon beast shook its body violently, Wu Song shook twice, and the feathers he had been holding on to were torn off, and Wu Song fell.

Wu Song was not panicked, as soon as he left the Eagle Demon Beast, he immediately launched the second layer of the Divine Blade Shadowless, turned into a Yuan Force Long Sword in his hand, and pierced into one of the legs of the Eagle Demon Beast, fixing his body.

The eagle monster let out a cry of pain, flapped its wings, and continued to fly upward. Wu Song hung on the legs of the eagle demon beast, trying to stabilize his body.

Suddenly, Wu Song felt a huge force appear nearby.

It didn't take much thought for him to know that it was the bat monster beast who came. Wu Song looked back and saw the huge figure of the bat demon beast appear dozens of meters behind him.

It opened its jaws and emitted a puff of black smoke.

Wu Song secretly said that it was not good, in such a high place, the eagle demon beast would inevitably be killed by black smoke, and when he fell, he would definitely fall to the ground.

In addition, in the air is the territory of bat monsters, Wu Song has no lake to hide, and after being hit by black smoke, I am afraid that he will also die.

Before Wu Song could think of a countermeasure, the black smoke had already arrived.

The eagle monster beast was instantly hit by black smoke, and all the skin and flesh on its body turned to ashes, leaving only Sensen's white bones, which fell from the sky to the ground.

Before the black smoke came, Wu Song used Yuan Li and covered the surface of his body with a layer of Yuan Li coat, hoping to resist the black smoke.

Black smoke enveloped Wu Song in an instant, and the scorching waves of qi licked Wu Song's Yuan Li coat. It was only a moment's effort, and Yuan Li's coat was damaged in many places, and it was expected that it would not last long before it was completely damaged.