Chapter 639: Backtracking and Light Cone

When only you in the whole world can perceive the truth...

When only you can realize that this empty world is being constantly manipulated by someone.

Even if you know that other people have free will, it's just... this kind of free will is ridiculously weak.

They have free will simply because the Mighty Ones want them to.

If they want to, the powerful ones can also make the entire world change according to their wishes, allowing those 'free wills' to change at will.

It is easy to modify memories, erase experiences, and reshape personality.

When you understand this kind of thing, and at the same time... you also have the perspective of these powerful beings, you will be very painful.

Especially when you are not a powerful person.

You can only watch all this and keep repeating the trajectory set by the Almighty.

You have free will simply because they need you to have free will.

If you don't care about anything, then it's better to say that you can go crazy, vent your pain violently, mess up everything around you, and pour out all your dissatisfaction.

But Li Qi couldn't do it. Opposite him were Rabbit and Little Bunny. If he vented his anger, they would only think about what happened in the past three hundred years. The reunion would turn into worry, and the rare joy would be overshadowed. haze.

Although... a lot of things did happen, but Li Qi really didn't want this.

Passed by dozens more times.

Li Qi was really tired, and Shen Shuibi also asked him dozens of times.

I don't know since when, Rabbit could sense something was wrong with Li Qi every time, but Li Qi couldn't say anything.

This is the perspective of the Witch God, and you can’t just talk about it everywhere.

Just as Chang Xi Dawu said, just knowing some things will bring disaster.

However, after dozens of times, Li Qi woke up.

This time, it's not in Guanghan.

Li Qi took a deep breath.

What followed was not joy, but ‘relief’.

Finally... finally.

If it was repeated, Li Qin would rather keep reincarnating in the battle of life and death than experience the time with his family over and over again.

However, if it wasn't Guanghan, this should be a war zone, right?

He was still looking around when a voice came from beside him: "Li Qi?"

Before Li Qi could speak, Li Shiwei next to him shouted in surprise: "Uncle Boyue?!"

Li Qi also found the source of the sound. Not far away, there were some halos of world group formations. This place should be in a certain world, and it was also the kind of world that was about to die.

And in the center of those rings that surround hundreds of miles, about seventy miles away from him, Boyue is sitting there.

This is really a coincidence.

This is probably a true coincidence, because no one can control such an insignificant thing, and Li Qi did not observe any weird fluctuations in the line of cause and effect, and the Witch God has said that from now on, no one can arrange Li Qi's Destiny, Li Qizhen had real reality and escaped from this situation.

That's really fate.

"Haha, Boyue, I didn't expect to be working under your hands this time." Li Qi smiled, cheering up and relaxing his numb heart.

People still need some new things to stimulate them. There is always one thing that reincarnates endlessly, which even Li Qi cannot bear.

On Boyue's side, while processing the information sent by the World Group Formation, he said: "You are such a kid, why are you dragging your family with you... I can't move, you guys come here."

"What? Aren't you happy that I'm here to be your killing squad? How many people can be better than me?" Li Qi said, and at the same time he and Shen Shuibi walked away from Lingcha.

Lingcha disappeared the moment Li Qi left.

Guanghan's Lingcha is said to be able to go anywhere, but if you want to go to Guanghan, you have to run by yourself and cannot be teleported. This is a completely one-way communication method.

"I'm glad...you bastard is already at level 5, can you practice a little slower?" Boyue sighed, his face full of exhaustion.

Seventy miles is a short distance for the fifth grade, so as he spoke, Li Qi had already brought Shen Shuibi to Boyue.

Although Shen Shuibi has become a mother now and her personality has changed a lot, she is still generally a reserved and dull person. She did not speak and just stood beside Li Shiwei.

Li Shiwei also knew that her father was discussing business with her uncle, so she didn't interrupt, but kept looking around, especially at the World Group Formation.

This thing is an upgraded version of the Wu Dao Landscape Formation. It can deploy the resources of an entire world group. Its effectiveness is very terrifying. It is the main force against the humane war fortress.

"I also want to settle down, but unfortunately I might die if I settle down. The situation forces me to have no choice..." Li Qi shook his head and sighed.

He tried his best to return to normal and not let others see the problem.

Boyue is only at the sixth level now, just like when Li Qi was the commander.

"Okay, I know you are not doing well by looking like you, but the situation here is not very good either. As you can see, my Palm Killing Team has lost almost all of it, so I reached out to ask for support from above. , you have a lot to do.”

"It's a small matter, it's all about doing things. It really makes me idle and waiting to win, which is not good. How is the situation on your side?" Li Qi sat down and asked Boyue.

Since the two were acquaintances, they went straight to the topic without any unnecessary reservations.

"The opponent is very powerful. They used an ambush to defeat my palm killing team, which made me unable to contain the strong humane army. Now I am in a passive situation of being beaten, and it is difficult to break the situation." Boyue said straightforwardly.

"It's indeed difficult." Li Qi nodded, he had also been played like this by Liu Junyi.

Liu Junyi first defeated Li Qi's palm-killing team, and then used the dog-walking tactic to trick the witchcraft army into applause. In the end, Li Qi tried his best. In addition, he temporarily mastered the power of cause and effect, and had third-level treasures to help him get promoted. Only then can he defeat Liu Junyi.

In a pure battlefield game, Li Qi honestly couldn't beat Liu Junyi.

Boyue continued: "I have tried using magic seeds several times and cut out many futures I don't want, but it is still difficult to win. Even if I could start over, the other party would not give me an opportunity to take advantage of it."

These words made Li Qi suddenly stunned.

Wait, he suddenly remembered.

Boyue's demon species! It is possible to cut off Zhou Guang! And he could do it when he was at the ninth level.

Is this some kind of special 'backtracking'?

It's like one's true knowledge of rhyme is the manifestation of some special power. As a young master, basically everyone has such a skill.

"Wait a minute, let's not talk about this first. Let me ask first, is there any limit to the range of your demon species?" Li Qi suddenly asked.

"Ah? You have a grudge against me? Do you want to find out where I am?" Boyue smiled.

This is not very polite. Asking this is just looking for Boyue's weakness.

"No, I've encountered something recently, and it's related to you. Let me change with you..." Li Qi also realized that there was something wrong with him, but he couldn't give up.

However, Boyue waved his hand: "It doesn't matter, between you and me, brothers, the ninth grade depends on each other's life and death. How can I not trust you? But do you really need this information? Is it even more important than battlefield information?"

At this time, Shen Shuibi also realized what was going on. He coughed twice and claimed that he wanted to go around to see the World Group Formation, so he took Li Shiwei there.

Li Qi and Boyue naturally watched her leave, leaving only Boyue and Li Qi at the scene.

So, Li Qi nodded: "Well, this is very important to me, and if I know this, maybe I can help you win the battlefield here."

"Okay, I believe you, then just ask." Boyue was also very happy and recognized it directly.

"Still the same question, is there a limit to the scope of demon species?" Li Qi asked.

"Yes, it mainly depends on the surrounding pressure of heaven, my mana level, and the length of the backtracking time." Boyue nodded: "If I am outside the territory now, excluding one second, the coverage will be about 600,000 miles back, but I It can be adjusted. If you cut off for ten seconds, the coverage radius will be doubled. "

"If it were in the world, this number would probably be fixed at around five miles, because I can't support cutting out more time and scope. Five miles... the time of looking back is probably less than a moment, and it can't even be counted as looking back. It can only be considered as looking back. It’s considered suspended, so it’s basically not available in the world. The Heavenly Way in the world is really too strong.”

Li Qi immediately realized something: "In other words, this range is linked to time. The longer the cutting time, the larger the range it can affect, and the mana consumed also increases exponentially?"

"Well, that's it." Boyue agreed, and said: "This range is generally related to the limit of heaven. I can also manually compress the range, but that requires me to adjust the speed of the limit of heaven."

As he spoke, he demonstrated.

Boyue raised his hand and activated the demon seed. Li Qi also immediately felt that the cosmic light around him began to peel off, and the range... was the speed of light × time.

Li Qi is a smart man, and with just this move, he immediately realized the reason.

is the speed of light.

The limit of Boyue's backtracking is the speed of light.

If he uses the magic seed to go back one second, he has to go back one second to the speed of light, no matter what the speed of light is or whether it has been changed.

Or it can be said that... what he traced back was a cone of light.

All events in the universe spread over time, and as time increases, the scope of influence of the event also becomes larger. The scopes in each time period are stacked together, and finally a cone is formed.

Suppose you light a candle and it spreads light around.

The moment the candle is lit, the light will rush outward in all directions, flying at the speed of light, forming a bubble that continues to grow outward.

You can never go beyond this bubble, because an object with mass cannot exceed the speed of light and cannot exceed the limit of heaven.

You can modify the limit of heaven, just like all outside travelers, but the light will also increase in speed, and you have never been able to exceed this limit.

This is the meaning of ‘the limit of heaven’. It can be modified but cannot be surpassed.

So you can't escape from this bubble.

If you cut each moment of this bubble into planes and combine them, you can see a cone, starting from the candle and extending to the infinite future.

The expansion of this cone from the past to the future time is the central axis of the cone. The sides of the cone are inclined at 45 degrees, because the distance traveled by light in a given time is absolute. For example, light travels one light year in space in one year. distance, this cone is the light cone.

The 'point' at the front of the light cone is the cause of the light cone.

The circle at the back is all the fruits.

The origin is the beginning of the event, the direction in which time increases is the future of the event, and the direction in which time decreases is the past of the event.

The cause of this event and all the impacts on the future are within this cone, thus creating a cause-and-effect relationship in the universe.

This is the most important law of cause and effect in the universe.

Within the light cone is destiny.

Any event in the universe can only affect objects within its future light cone, and objects outside the future light cone of the event will not be affected by the event.

People outside the light cone cannot understand the events that happened inside the light cone, and people inside the light cone cannot understand the outside of the light cone.

Starting from the light cone, the universe is clearly divided.

Therefore, the backtracking of the demon species can only backtrack one light cone.

Therefore, backtracking will not produce any causal paradox, because things within the light cone cannot affect the outside, so local backtracking will not produce any consequences.

Then... the backtracking of the powerful may also follow the same principle? It's just that the method is more advanced, similar to the comparison between the fire in the primeval forest and nuclear fusion.

Although both use temperature, the difference between them cannot be remembered.

If this is true...

Li Qi shook his head.

Even so, he seemed to have no way.

However, this conjecture should be of some use to Boyue?

So, Li Qi said: "I have recently...some experience with the line of cause and effect. Suddenly, I heard that your demon seed was like this, and I came up with a conjecture. You listen to it."

After that, Li Qi began to preach in front of Boyue.

The line of cause and effect unfolded, and at the same time, it was combined with the 'light cone'.

Space and time, cause and effect, merged into one at this moment.

It turns out that the line of cause and effect is not a two-dimensional plane.

Before, Li Qi's understanding of cause and effect was 'cause line' plus 'effect point', and then spread out a huge network, but this network is flat, two-dimensional.

But... if it is combined with time and space?

At this moment, the flat network has become a 'three-dimensional' like a light cone, and the law of cause and effect has reached a new height at this moment, just like a two-dimensional creature has evolved to three dimensions.

However, Li Qi's preaching was a bit lame.

He was very familiar with cause and effect, but he didn't understand the time and space represented by the demon seed.

But it happened that Boyue understood it very well.

Boyue immediately stood up from the world group formation and sat down in front of Li Qi.

He also began to perform the Tao, using his own understanding to supplement Li Qi's lack of understanding of demon species and time and space.

The two became one, complementing each other's understanding of the Tao, and their understanding of the Tao merged together in a strange way.

It seemed... it was born to be like this.

Time and space and cause and effect are one.

Cause and effect have a strict time relationship.

There must be cause first and then effect.

At the same time, the light cone itself is also a manifestation of space, and time and space are one, and the relationship between cause and effect in time can also be projected into space and become the trajectory of space.

Yes, time is the trajectory of things moving in space, and time is a movement axis of space.

In this way, the law of cause and effect and the law of time and space are unified.

This is just an inspiration for Li Qi.

But for Boyue, it is an opportunity for breakthrough!