As the empress who breaks off her engagement at the beginning, I choose the evil little black lotus.

Zhu Jiu: "One thought creates a cause, and the seed blooms."

"I remember that Master once taught me that everything between heaven and earth, from billions of dust particles to billions of sentient beings, and the thoughts of birth and death at every moment, are interacting and colliding with each other.

"This is why a butterfly flapping its wings can cause a storm."

"This is cause and effect! It's too vast and too complicated. I'm afraid no one can figure it out."

"But I saw from the memory of the Demon King that in fact, cause and effect not only exists within the heaven and earth, but can also extend outside the heaven and earth, and even outside the world system."

"It's just that the farther the radiation is, the stronger the cause and effect is."

"When a butterfly flaps its wings, it may be possible to cause a strong wind on the other side of the sea, but it is impossible for the wind to blow to another world, let alone another world!"

"So I said that in order to create a link between the two world systems, in addition to great luck, it must also be the cause and effect of the strong."

Zhu Jiu: "Master, do you still remember the content of Xiaoyaoyou in the Nanhua Sutra?"

"Kunpeng thought, and the water accumulated for three thousand miles, soaring up to ninety thousand miles, from the Antarctic to the North Pole. This can also be said to be its cause and effect."

"But when a sparrow jumps, it can only jump from one side of the grass to the other side of the grass. This is also its cause and effect."

"The same voyage, the difference is so huge."

"And it just so happens that the Demon Emperor and the Goddess of Heaven are both Kunpeng, and they are truly powerful. They may have caused the seeds to bloom, and the flowers to bear fruit, which caused the intersection between the two world systems."

"It sounds reasonable." Su Yan couldn't help but fell into deep thought after hearing this.

However, according to the theory of the young apprentice, there is still a bug, and that is himself.

Before he traveled through time, he was just an ordinary social creature.

That is the sparrow in Zhu Jiu's metaphor.

What's more, it might be just a bug under the sparrow's mouth. It's not a strong person at all, so why did it travel through time?

Zhu Jiu said leisurely: "Once you think about cause, cause and effect, and if the opportunity coincides, the 'door' you pass through may appear in front of you. It may be a blue moon, a falling spring leaf in autumn, or a thunder on a sunny day. A flying pig... There are various 'doors', and once attention is attracted to the 'door', it is possible to travel through it."

Su Yanxin said: This way of explaining time travel seems to make sense.

On Blue Star, the 'door' may also be a computer that suddenly explodes, a mud truck that suddenly appears, or the like.

Although, Zhu Jiu in front of him said that only the mind of a strong person may have enough causal power to transform into a "door".

But judging from her own time-traveling and other time-travelers whose presence or absence Blue Star seems to be, Su Yan feels that if her time-travel theory is really true, it should still be a matter of probability.

In a certain dimension, a small chaffinch may not be able to fly to the South Pole.

"So Jiu'er, after the 'Gate' appears, will it always exist?"

At this time, the two of them were discussing as if they had discussed cultivation with Zhu Jiu.

Su Yan thought that after traveling to the Shiyuan world, there was no way he could return to Blue Star. On the contrary, Shen Xiaoxue could freely come and go between the two worlds of Shiyuan and Paradise.

"It's impossible, Master." Zhu Jiu shook his head: "The appearance of the door is just an accident, just like two particles of dust blown by the wind, they happen to collide in the air, and they are separated as soon as they touch! The existence time is as short as a snap of a finger, or even an instant.”

"Actually, most doors will not be noticed even if they appear."

Su Yan: "So, there should be no return."

Zhu Jiu nodded: "Yes, Master, the birth and death of a door is like dew or lightning, there is no return!"

Zhu Jiu: "As for why the goddess of the sky can go back and forth between the two worlds, that's because the door she walks through is not the door of cause and effect, but the door opened by the devil."

"The reason why she came to this world in the first place was not due to her, but because she was seduced by the Demon Lord."

"It's just that the demon lord is guiding Shenxiao, but his intention is to respect you, Master."

Su Yan: "How did she open the door?"

Zhu Jiu shook his head: "This disciple doesn't know, because he also imitates the door of cause and effect, and uses his great magical power to turn an instant into a long one."

Su Yan's expression changed. If this is true, then when Shen Xiaoxue becomes emperor, will he be able to open a door for himself from the Shiyuan Realm to Blue Star?

However, such thoughts only flashed through his mind for a moment, and were extinguished by himself.

I don't know when, although Shen Xiaoxue stood taller and taller, Su Yan's expectations for her became less and less.

Seeing the wry smile on his face, Zhu Jiu thought he was worried about the Demon Lord, so he persuaded him: "Master, there is no need to worry about the existence of the Demon Lord. She does not dare to come, and her clone can only reach the level of spirit transformation." level……"

When she said this, she couldn't help but pause.

Because that avatar at the level of becoming a god is Gu Nanyi.

"Furthermore, the rules between the two world systems are mutually exclusive. Based on the practice system on the other side, the combat power will not be equal to one in ten, or even one in a hundred."

"Her only choice is to take another clone and rebuild."

"By the time she completes her cultivation, Master's cultivation will have already been completed."

"As for her Nascent Soul female cultivator clone with Tianling spiritual roots, she has been practicing the wrong spirit transformation technique for many years, and a big thunder has been planted in her body, so there is no need to worry."

"Master, the one who can replace the Paradise in this world will not be her, it will only be you."

As if the identities were reversed, Zhu Jiu looked at Su Yan at this moment, not like a disciple looking at his master, but more like an old master looking at his disciple.

"Even the Demon Lord cannot steal the Master's Dao Fruit."

"Many years from now, if there are still time travelers visiting this world system, I hope they can call this the world system of cultivating immortals."

"It's a pity that my disciple is not lucky enough to achieve this with his master!"

Su Yan: "..."

Facing Zhu Jiu's pair of expectant violet eyes, Su Yan could not help but avoid looking at him at this moment.

After a long silence, I heard him say dryly: "Jiu'er, I no longer have any spiritual roots."

"Wha, what?"

Big eyes, big doubts!

Su Yan sighed: "After that night, I have no spiritual roots."

"Why, how could this happen?"

"Then, is the elixir such a vicious poison?" Zhu Jiuru was struck by lightning.

When she refined the Demon Lord's consciousness, she only picked up some sporadic memory fragments, among which there was no content about the Jade Toad who borrowed his life.

I don’t know if the Demon King knew something was wrong at the last moment and erased some important secrets from his memory.

"Jiu'er, my time in this world system may end here. It's up to you to transform this place into the world system of cultivating immortals you call it!"

After Su Yan finished speaking, seeing that she still looked lost, he couldn't help but wave his hand in front of her eyes.

"I heard you talk so much about everything. Tell me about yourself. Where are you?"