After mastering the power of the Source, one can inject the power of the Source into perception, enabling the discovery of previously undiscovered things.

For example, the area where Green is currently located is inaccessible to ordinary people without mastering the power of the Source. Even gods cannot discover it.

Compared to the dark red sky of the demon realm, this area feels even more gloomy.

The ground is made of a material similar to soil, with countless spikes protruding from the ground. Although they are not long and not very hard, the density is enough to make people extremely cautious.

However, Green envelops the source energy on his body and can walk on this ground without any obstacles.

"It's really dark."

Not only is it dark, but there is also a faint glow. However, upon careful observation, it is impossible to find the source of the light.

In such a strange space, the atmosphere is extremely oppressive.

Green walks slowly in this space. The main reason he appeared in this remote place is that he sensed this suspicious place using the power of the Source.

If his guess is correct, this should be the world's root mentioned by the God of Light.

To change the basic appearance of a world, one must come to this place and possess the power of the world's source. That is the fundamental power to change the world.

I don't know how long he has walked, it seems like a very long time, and it also seems like just a blink of an eye, when suddenly a huge shadow appears before Green's eyes, accompanied by an extremely ancient voice.

"You are the first human to come here."

"What?"

Green's foot, which was stepping in the air, stopped suddenly. The voice that suddenly entered his ears made him think it was an illusion.

But that voice followed immediately, or to be more precise, it was not a voice, but directly transmitted information into his mind, accompanied by incomprehensible voices.

"Do you want to change the demon realm? Or do you want to be the ruler of the demon realm? Or is it for power?"

"What is this?"

The first time, Green could still think it was an illusion and ignore it, but the second time, he couldn't.

Green put his foot down, stood firm, frowned, and shouted angrily, "What kind of trick are you playing? Show yourself if you have the guts!"

In an instant, the smoke-like object in front of Green gradually dissipated, and the huge black shadow gradually revealed its true appearance. When Green saw the other person's face clearly, his eyes widened.

"So...ugly..."

It has to be said that it really looks extremely ugly.

Its body is coiled like a snake, with a row of eyes on its head. The mouth and nose cannot be seen clearly. There are scale-like patterns on its body, but the shape is like leaves, and the whole body is a dark purple color.

At first glance, not only is it aesthetically unpleasing, but it also gives a bad impression.

It's just like a monster.

To be honest, Green really dislikes this kind of elongated creature. Dragons are fine, but this kind of creature that clearly leans towards snakes is something Green cannot bear. He even has the urge to destroy it directly.

But Green is a modern civilized person. How could he possibly do such a barbaric act?

Boom-

A source energy bullet mixed with the power of the demon king hit the opponent's scales, but apart from a loud explosion and the resulting light, nothing else happened.

The opponent spoke again.

"Interesting, there is an energy I do not know about inside you, but it is still far from the power of the source. Do you really think you can defeat me with just this kind of power? How naive! I am the true ruler of the demon realm, the one who controls the power of the demon realm source. I am an invincible being!"

Green ignored it and fired another source energy bullet.

Unfortunately, it still couldn't cause any damage.

"You have tough skin."

Seeing that Green completely ignored its words, this ugly monster became displeased.

"Arrogant, ignorant, foolish, self-centered, savage, weak... All creatures possess these traits, but you demonstrate them particularly well."

"Stop talking nonsense!"

Green aimed his palm at it and continuously fired energy bullets, hundreds of them in just a second.

Countless explosions illuminated the space, and the sound of the explosions echoed.

However, it was still useless.

The ruler of the demon realm moved its body and released a large amount of gas from its scales.

"It's useless. No matter how powerful your energy is, you cannot harm me because I am composed of the power of the source. Your energy cannot harm me from the fundamental rules."

"..."

"Next, let me show you the difference between the power of the demon realm source and what you had before!"

To Green's surprise, something unexpected happened. When these words entered Green's mind, he discovered that the opponent actually opened its abyss-like mouth - it actually had a mouth!

A surge of intense energy burst out from the ruler's mouth, instantly engulfing Green's body.

And upon seeing this scene, the ruler's figure gradually disappeared once again.

In its view, Green had been annihilated by the power of the rules.

However, at this moment, Green's sigh could be heard.

"I didn't plan on using this energy, since it is very limited and I don't know where to get more once it's gone. But now it seems like I can't defeat you without using it."

The disappearing figure of the ruler appeared again, and it opened the row of eyes on its head. It found that Green, at this moment, was standing completely unscathed in the same spot.

A faint golden energy emerged from Green's body, and his hair color also changed. His whole body emitted a dazzling golden light.

The power of the source erupted from within him, easily resisting the so-called power of the demon realm ruler's rules.

And as Green activated the power of the source within him, even though the ruler could not show expressions, Green could sense its astonishment.

"This... this is...? Impossible!... You're just a human, how could you possess and even manipulate the power of the world's source?!"

"Who knows."

Green spoke with a frivolous tone, casually extended his hand towards the giant body of the ruler, and then instantly unleashed the power of the source from within him, directly shooting a golden energy beam that pierced through its body.

It's amazing that the golden pillar of energy passed through the body of the Lord of the Demon Realm without leaving any trace.

But then, it stiffened in place like a snake, and gradually cracks appeared, resembling a dried-up riverbed. Like sand, it gradually drifted and flew towards Green.

Because his body was protected by the power of the source, Green was not afraid. Soon, he discovered that the fragments of the Lord, which had turned into dust, instantly merged into the power of the source upon contact with his skin.

At the same time, Green's mind was flooded with a wealth of information.

Although it couldn't be described in words, just like consuming the Heart of the Universe, these things silently transformed into an instinctive existence.

"Is that it? How boring."

Green looked at the fragments rushing towards him like moths to a flame, with a clear expression of astonishment in his eyes.

He thought it would require a lot of effort, but it ended in an instant.

But soon, Green smiled. He was a civilized person after all, and violence and killing were not good. Peaceful resolution was the way for civilized people.

"So, let's try to change the Demon Realm next."

Confidently, Green extended his hand, and a pedestal rose from the ground. Like he had done countless times before, Green skillfully operated on the pedestal.

As Green worked, the residents of the Demon Realm were surprised to find that the dark red color in the sky was gradually fading, replaced by a beautiful new sky, deep blue in color.

But Green's changes to the Demon Realm didn't stop there.

"The rules of becoming a Demon King... Hm, let's keep only the aspect of random birth. If the other demon races found out that the last survivor in a clan could evolve into a Demon King, it would undoubtedly cause unnecessary trouble."

Green didn't know how he knew all this, but he did. As long as the thought entered his mind, his body would move skillfully.

In addition, Green also improved the air quality of the Demon Realm. But just as he was about to continue changing other things, he suddenly realized that the Demon Realm had no response.

"What's wrong? What's happening?"

Green retracted his hand and tried to call upon the power of the source within his body, only to find that there was no response.

The power of the source did exist within his body, but it could not be mobilized at all. Or rather, after being mobilized, it quickly returned to its original position. However, simply mobilizing the power of the source without using it would still turn his hair golden.

"Is it not enough?"

Indeed, it seemed to be the reason. Green could feel that the storage of the power of the source within his body had decreased significantly.

It seemed that the energy of a single Heart of the Universe only amounted to this level.

Green didn't worry too much. Instead, he quickly accepted this fact. He wasn't an excessively greedy person. Since his goal of changing the Demon Realm had been achieved, it was time to go back.

With a gentle tap of his hand, the teleportation gate opened smoothly.

Back in the Demon Realm.

"Huh? The sky... it's becoming... blue?!"

"What's happening? The sky is gradually turning into a deep blue?!"

"Could it be that Lord Green succeeded?!"

Not only the leaders of various tribes, but also ordinary people flocked to the streets to witness this historic moment with their own eyes.

The dark red sky gradually lost its color and was replaced by a refreshing and vibrant blue sky.

In an instant, members of all races felt a sense of release, as if their bodies were freed from shackles. Even their breath felt smoother.

The residents of the Demon Realm, for the first time, realized that the sky could be so beautiful.

Under the change of the sky, everything that was once familiar took on a new tone, becoming both unfamiliar and familiar, but absolutely beautiful.

As they witnessed the change in the sky and the changes in their own body and mind, the conservative faction couldn't help but reveal a faint smile after a moment of daze.

Looking at the suddenly changing sky, Elsa had a feeling as if she had arrived in the human realm, but she quickly realized that it must be Green's success.

Just then, a portal appeared in front of her.

Seeing Green appear, Elsa excitedly rushed towards him.

"Green, you really did it!"

"Hehe, with me in charge, this kind of thing is a piece of cake!"

The two embraced each other and looked out the window at the blue sky, both wearing faint smiles on their faces.

Although the sun couldn't be seen in the sky, the radiance still existed.

Unfortunately, Green didn't implement a day and night system for the Demon Realm.

This was mainly due to the consideration of the living habits of the residents of the Demon Realm.

The residents of the Demon Realm have always slept when they were tired and continued to roam when they woke up. They had never heard of the concept of a biological clock. Their bodies had gradually adapted to this long-term living habit, so there was no need to change it.

"By the way, it's about time to bring Aloof and the others here."

"What?"

Upon hearing this, Elsa, who was leaning on Green's chest, showed a dissatisfied expression. She wouldn't oppose bringing Aloof and the others here, but relatively speaking, she still preferred to be alone with Green.

Green didn't pay much attention to this, but instead held her arm tighter.

"Elsa, what do you think about staying here for the rest of our lives? With me here, this place is definitely much safer than anywhere else. Aloof and the others shouldn't refuse, right?"

"Um...it's up to you. Really!" Elsa stood up from Green's embrace, her expression slightly discontented. But she could tell that Green was seriously considering it, so she didn't protest his actions. After all, besides being a bit of a playboy, he was good in other aspects.

"Well, Elsa, you wait here for now. I'll go talk to them and be back soon!"

"......Hmm."

Elsa nodded her head as she turned her back, but after a while, she suddenly felt a sense of emptiness when she realized that Green had already left.

"I'm sure he'll come back..."