If it weren't for the old turtle breaking through the ground of the main hall, this mysterious formation might not know how long it would take to be sealed in the dust before it could reappear in the world.

The huge array diagram exudes an incomparably simple atmosphere, and at a glance, it is absolutely extraordinary. Even after endless years, it seems that it has not lost its effectiveness, and if there is no time, it seems that there is still a way of light flowing.

Liu Yu found that there was a depression in the east, south, west, north, and middle directions of the formation. The depression is as smooth as a mirror.

The countless ancient runes that formed the formation diagram radiated in all directions with those five depressions, and it seemed that there was something in the depression, but it was taken away.

Liu Yu vaguely guessed that these five depressions might be the five eyes of this mysterious array, and if you want to activate the big array, you have to inject energy into the array.

Usually, the place where the formation is injected with energy and the large array is activated, and the eye of the formation is formed. As long as there is enough energy, the large array will be operational.

The old turtle carefully observed the mysterious array on the main hall, and the strength of the authentication seemed to be to see every rune and every engraved line on this array clearly.

Liu Yu doesn't cultivate the Dao method, so he doesn't know much about the formation method, but the formation in front of him is obviously an ancient formation in ancient times.

Even with the ordinary formation, Liu Yu couldn't see a reason, let alone this ancient formation. Since he couldn't understand it, Liu Yu found a corner in the hall and sat down cross-legged.

The old turtle, on the other hand, was carefully studying this ancient formation, bowing his head and pondering from time to time, pinching his fingers from time to time, as if he was calculating something.

Sometimes confused, sometimes abrupt. Sometimes frowning, sometimes surprised, all kinds of expressions continue to change on the old turtle's face like a marquee.

The old turtle seemed to have been fascinated by the ancient formation map on the main hall, which surprised Liu Yu, he didn't know why the old turtle attached so much importance to this ancient town map.

Liu Yu wanted to ask out loud several times. But in the end, he didn't say anything, since the old turtle attached so much importance to the formation, there must be his reasons, why bother him.

So, Liu Yu no longer paid attention to the old turtle who was obsessed with studying the map of the ancient town, and began to close his eyes and exercise to recuperate. His cultivation had reached a bottleneck, and he had to prepare to break through the cultivation screen.

The huge vitality in Liu Yu's body washed over and over again in the meridians, muscles, bones, flesh and blood. According to the path of the Great Zhou Tian in the body, over and over again, it will never stop running.

Every time the Great Zhou Tian is run, not only the meridians, muscles, bones, flesh and blood organs of the whole body are washed with vitality, making the body more powerful, but at the same time, the vitality in the body will also be refined to be more refined, and impure impurities are discharged from the body.

Until the light came through the main hall. When the sky turned white, the old turtle stopped studying the map of the ancient town. The old turtle looked tired. It seems that it took a lot of effort to study the map of the ancient town.

Although he was very tired, as if he had fought a big battle, the old turtle seemed very happy, and he walked out of the main hall. Then, a long howl like a ghost crying wolf came in from outside the hall.

Liu Yu, who was in the middle of the meditation, was also awakened by the long howl coming from outside the hall. Then he rushed out of the main hall, only to see the old turtle roaring in the sky, and the sound shook the sky, and even the gray dead air shrouded in the sky was turbulent.

"Is this old Wang Ba crazy!" Liu Yu hurriedly turned off his hearing, but even so, Liu Yu's chest was like a thousand-pound boulder, and he panicked.

The long howl lasted for a long time, and it spread far away, and the undead creatures who heard this howling sound all trembled, and the powerful aura emitted by the old turtle made the undead creatures in the area near the main hall terrified.

"Stinky boy, we probably don't have to go to the center of the Purgatory Realm. After the old turtle came back to his senses, he turned around and grabbed Liu Yu's shoulders and said excitedly.

"Hiss!" Liu Yu, who was grabbed by the old turtle's shoulders, suddenly gasped, the strength of the old turtle's hands was too great, and he was shaken twice by the old turtle, and the whole person was about to fall apart, and there was a piercing pain on his shoulders.

"You...... Can you let go first!" Liu Yu broke out in a cold sweat in pain, and his face was a little distorted.

At this time, the old turtle also noticed Liu Yu's strange appearance, a trace of strange color flashed in his eyes, and then let go of Liu Yu, and said with a smile: "You stinky boy, your body and bones are too weak." ”

Liu Yu couldn't help but be speechless when he heard this, Liu Yu was a martial artist, and his physical body was strong enough to shake ordinary magic weapons. Among cultivators of the same level, I am afraid that there are few people whose physical bodies can be cultivated so strongly.

However, Liu Yu immediately realized that this old turtle was a super old antique in ancient times, and in front of him, Liu Yu's physical body was indeed very weak.

"What did you just say. Liu Yu asked.

"Say that your body is very weak!" the old turtle replied, the old turtle thought to himself, this guy will not be so stingy, but looking at Liu Yu's expression, he did not look angry.

"It's not this sentence, it's the previous sentence, what did you say in the last sentence?" Liu Yu asked nervously looking at the old turtle, his voice trembling.

"Previous sentence...... I said we don't have to go to the Purgatory Realm Center. The old turtle replied, he didn't know why Liu Yu asked like this, which made him a little puzzled.

When Liu Yu heard this, his body shook suddenly, he couldn't stand steadily, took a step back, and said, "So, have you found a way to get out?" Liu Yu's eyes were fixed on the old turtle's face, and his excitement was difficult to hide.

Liu Yu knew very well what their purpose was in the depths of the Purgatory Realm, and they had only one purpose, that is, to find a way to get out of the Purgatory Realm. The old turtle said that there was no need to go to the central area of the Purgatory Realm, so didn't that mean that he had already found a way to get out, and they didn't have to venture into the central area of the Purgatory Realm?

After the old turtle heard Liu Yu's words, he was first overjoyed, and then the look on his face was a little unpleasant, and he said: "I have found a way to leave the purgatory realm, but some problems have not been solved. ”

"What's the problem?" Liu Yu's eyes suddenly lit up when he heard this, and he said excitedly. It's good to be able to get out of here, and listening to the tone of the old turtle, it seems that there is still hope.

"The ancient array diagram on the main hall is actually a teleportation array, after my research, this is a cross-border teleportation array, but the problem is that I don't know where this teleportation array will teleport people, and the large array lacks the energy to activate. The old turtle said with a somewhat gloomy expression.

Since it was a cross-border teleportation array, if they could launch a large array, they would be able to leave the Purgatory Realm and enter an unknown world.

"Can't be sure where to teleport?" Liu Yu couldn't help but be dumbfounded when he heard the old turtle say this, this uncertainty made him feel uneasy. If the place of teleportation is not the Dragon Realm, it will be miserable.

"It's a bit early to talk about this now, if we can't activate this teleportation array, everything will be in vain. The old turtle said.

Indeed, in order to launch a large array, it is necessary to have the energy to make the large array work. The teleportation array of cross-border teleportation needs to gather strength to break the screen wall of the big world.

How huge is the power to break the world's screen, and what is the huge amount of energy needed to launch this cross-border teleportation array? Just thinking about it makes Liu Yu's heart palpitate.

Either way, though, they all found a way out of Purgatory, but it was risky and full of uncertainty. Moreover, it has become a tricky problem to provide energy for the array.

The old turtle turned back to the main hall, and then, Liu Yu also walked into the main hall. The mood of this person and turtle can be said to be both joyful and helpless.

For several days, the old turtle did not come up with any solution. So, the old turtle put this matter aside for the time being, and first single-mindedly refined the incomparably powerful soul power that was swallowed into his abdomen.

Strong strength is the guarantee of survival, and even the old turtle does not dare to relax.

And Liu Yu also cultivated, he entered the inner space he had opened up, and then sat cross-legged in the middle of the inner space.

The inner space of the five-zhang square circle has been completely stabilized, there is no distinction between heaven and earth, except for a piece of sand and mud that gradually has a little green, and the surrounding area is the tumbling chaotic area.

Liu Yu took out the blood-colored corpse pill that the old turtle gave him that contained huge life energy, and smashed the corpse pill. The corpse pill exploded, and the vast life energy that came out wrapped Liu Yu inside.

Liu Yu seemed to have turned into a blood-colored silkworm cocoon, and the huge life energy began to seep into his body from his pores, smelting it into the flesh and bones.

In order to survive in this cruel purgatory, Liu Yu entered the deep cultivation, and with the help of the huge life energy of the corpse pill, he had eight layers of certainty to succeed in breaking through the level.

Huge life fluctuations came out of the blood-colored cocoon, sometimes strong and sometimes weak, and the blood light emitted from the entire cocoon was also strong and sometimes weak, like a huge heart beating.

In the blood-colored cocoon, a powerful life is being bred.

After Liu Yu entered the inner space, in the ancient hall, the old turtle himself was left. When the old turtle completely refined the extremely large soul power in his abdomen, his cultivation seemed to have improved a lot, and the powerful aura made all the undead creatures in the nearby area dare not approach this hall.

Strength, the power of the soul is also power, this swamp is undoubtedly an endless place of death, a paradise for the undead, why not collect the soul fire of the undead to provide energy for the great array?

The old turtle's flash of inspiration directly decided the fate of countless undead creatures. As a result, the old turtle began to lurk during the day and go out at night to do a life of nocturnal wandering.

Half a month later, after killing countless undead creatures, the soul light of countless undead creatures collected by the old turtle was refined into a mass of energy that was not weaker than the soul power of an undead king.

But this was not enough, so the old turtle ventured into the depths of the swamp to find the undead king, fight with him, and harvest the fire of the king's soul.

As a result, the world of the undead creatures, which had gradually fallen silent with the fall of the three undead kings, began to turbulent again. (To be continued.) )