Although Sikong Nan has been in retreat for 20 years, he does not know much about the outside world.

But from Zhang Zichen's words, Sikong Nan heard a lot, and he knew that Zhang Zichen was not alarmist.

Everything is just as Zhang Zichen said, Penglai Immortal Island can no longer withstand the invasion of foreign races.

If this invasion really comes, there is no doubt that Penglai Xiandao will be reduced to cannon fodder and disappear from this world forever.

After hesitating for a moment, Sikong Nan was finally persuaded by Zhang Zichen.

He said, "Senior brother, since this is the case, then I will not persuade you anymore. But you have to think clearly, this undersea illusion is so dangerous that even my master and Uncle Duanmu, who have entered the late stage realm of Da Luo Jin Immortal for hundreds of years, do not dare to enter it at will. ”

"I've thought about this for a long time. Zhang Zichen stayed at the entrance of the cave for several days, just thinking about this problem.

Now, Zhang Zichen has figured it out, and he will muster up the courage to enter it.

Sikong Nan snorted and said, "Senior brother, I heard Master say that the time in this undersea fantasy realm is different from our reality. ”

"It's different?" Zhang Zichen was stunned, "What's the difference?"

"My master said that time passes much faster than the time we have in reality. As soon as Sikong Nan said this, Zhang Zichen seemed to understand something.

A long time ago, when Zhang Zichen was on the earth, the monks on the earth sealed the various spiritual veins.

Some of these spiritual veins are sealed on the wall, and some are sealed on a picture.

But there is no doubt that in these sealed spiritual veins, the time inside is mostly different from the time in reality.

For example, in the real world, it is only one day, and it is already a month in the spiritual vein.

And this is called the Time Seal.

Presumably, in this undersea fantasy realm, a kind of time seal was also set up by Penglai Zhenren.

So, Zhang Zichen asked, "Senior Brother Sikong, do you know how much difference is between the time inside and the time outside?"

"This is not only said by the master, but also recorded in our book of Penglai Immortal Island. Sikong Nan said, "According to the inference of the predecessors, the time inside the underwater fantasy realm and the time outside should be 10 to 1. ”

"10 to 1!" Zhang Zichen calculated and said, "That is to say, if you stay outside for one day, then in this illusion, it will be ten days." If you stay in the phantom realm for a month, it is equivalent to three hundred days in the real world, and one month is close to a year, which is relatively fast. ”

The world of the celestial realm is not the same as the time of the earth.

Moreover, in this heavenly realm, the aura is so thick that ordinary cultivators don't need this kind of time enchantment at all.

Only those who have cultivated to the heavens will need it.

On the other hand, the time void of the heavenly realm is completely different from the time void of the earth.

Here, ordinary people simply can't create space-time barriers.

Even the masters of the True Monarch and Saint Monarch realms, the space-time enchantments they created were not stable.

Moreover, once the space-time enchantment explodes, those who cultivate in it will definitely end up with a scattered soul.

Therefore, in this Heavenly Realm, there are very few people who can create space-time enchantments, except for those super powerhouses in the Great Emperor Realm, almost no one can do it.

Now, this space-time enchantment in the undersea fantasy realm was made millions of years ago, the ancestor of Penglai Immortal Island, Penglai Zhenren.

Hearing Sikong Nan say this, Zhang Zichen became even more interested in this undersea illusion.

It's just that Sikong Nan persuaded again: "Senior brother, why don't you think about it again?"

"No!" Zhang Zichen said very resolutely, "I've thought a lot about it these days, as the so-called tiger can get a tiger if you don't enter the tiger's den, this time, I must enter the undersea illusion and ...... Come back alive!"

Seeing the confidence exuded by Zhang Zichen, Sikong Nan did not persuade again.

It was only then that Zhang Zichen turned around and glanced at the huge cave, at the entrance of the cave, a transparent barrier like a film was fluttering under the surrounding aura, which was very conspicuous.

"Senior Brother Sikong, I'll go in now, you can wait here!"

Zhang Zichen instructed, and without any hesitation, he strode out.

Bang!

However, as soon as Zhang Zichen touched the enchantment film, it bounced back as if it had hit a stone.

"Can't get in?"

Zhang Zichen, who was bounced back, was shocked, he couldn't imagine that he was now in charge, but this film would still hinder him.

Just when Zhang Zichen was puzzled, he only heard Sikong Nan smile and said: "Senior brother, the seal of this undersea illusion realm and the seal of the aura pool are the same, and they were sealed by Master Penglai himself. If you want to open the seal, you must use the head token left by his old man, and inside this head token, there is the law of the great emperor's powerhouse, otherwise you will never be able to enter. ”

"So that's the case!" Zhang Zichen touched the back of his head with some embarrassment, originally he thought that if the head token was on him, he would be able to enter and exit freely.

I didn't expect that I would need this boss token to open the way.

So, Zhang Zichen immediately called up the head token from the space ring.

On this quaint bronze token, there is a distribution map of the 850 islands of Penglai Immortal Island, and some lines link these points.

Just this picture, it really looks a bit like an unfathomable formation.

In fact, to put it bluntly, Penglai Xiandao has seven major islands, eighty-one medium-sized islands, and seventy-sixty-two small islands.

These are a total of eight hundred and fifty islands, and they indeed form a huge formation.

The distribution map on the boss token speaks for itself.

Zhang Zichen held the head token in his right hand and walked forward again.

The moment the master token touched the membrane enchantment, it suddenly passed through.

Moreover, a huge enchantment void appeared in front of Zhang Zichen.

"Alright!

Zhang Zichen screamed in surprise, and without looking back, he entered it.

Sikong Nan stood outside the enchantment, trying to persuade Zhang Zichen again several times, but in the end he held back.

He knew that his persuasion did not have much effect.

Everything, or can only pray for the destiny of heaven.

"The master has nine primordial gods, according to the master, he adheres to the great luck of the heavens, has excellent luck, and will definitely be a legendary figure in the future. Since this is the case, let's see if he really has such great luck. ”

Sikong Nan muttered to himself until he saw Zhang Zichen disappear into the enchantment, and he stayed at the entrance of the cave and did not leave.

There was silence in the huge valley.

The pond-sized aura pool is constantly emitting nine-colored aura.

Strong winds blew everywhere.