Cao Ya looked somewhat curious. The legend of Yu Xinghai had a long history, spanning countless chaotic eras.

As the most infamous forbidden land in the Flame Dragon Domain, Yu Xinghai is notorious for its ruthlessness!

"Legend has it that in ancient times, even the ruler perished in Yu Xinghai!" Cao Ya whispered, knowing full well that this was no rumor.

Yu Xinghai is a remnant of an ancient war, and has existed for hundreds of millions of chaotic eras!

Before the 100 millionth Chaos Era, another chaotic universe invaded. The current desolate chaotic universe where Cao Ya is located naturally has to resist with all its might. Under the leadership of the cultivator leaders - the Supremes, all the rulers, as well as the Eternal Emperor, the Dao Lord of Life and Death, etc., all fought hard and killed the invaders!

That war was protracted and the number of powerful figures who died was countless, often numbering in the tens of thousands. As for other emperors and Dao lords, their numbers were even more innumerable!

As a result, various traces of war were left in the vast and chaotic universe.

The fall of so many powerful figures, their ultimate moves unleashed with all their might before death, intertwined and distorted all paths, disrupting space and time. Even after hundreds of millions of chaotic eras, it still could not be quelled and remained terrifying beyond measure, enough to threaten the life of the ruler!

However, even within the Yu Xinghai region, such perilous places are not numerous.

However, the remnants of various emperors and Dao Lords number in the thousands or tens of thousands. Their desperate spells were extremely vicious and have survived to this day, posing a considerable threat!

"Ancient war, the Sith Chaos Universe, invaded the wild Chaos Universe for the sake of one man's ambition, and ultimately failed. Both sides suffered heavy casualties, and countless realms and alien universes were permanently destroyed as a result."

Cao Ya sighed, deeply understanding that the leader of the Sith Chaos Universe invasion was an ultimate supreme being who came to refine the primordial chaos universe. If it weren't for the universe's instinctive resistance and suppression, their side would have had no chance of winning the ancient war!

Moreover, even though he lost the ancient war, the ultimate supreme being did not give up. He lurked in the shadows and used the massive resources supported by the Sith Chaos Universe to refine rare treasures. Once he completed his preparations, he will undoubtedly start a new round of cosmic war!

In the face of such a war, let alone Cao Ya, who has just entered the level of the Holy City Lord, even ordinary rulers and even super rulers are just soldiers and cannot truly affect the battle!

Only the Supreme Being is a general, who can significantly increase the probability of victory in this universe!

"Fortunately, in the eyes of such beings, the scale of time is no longer measured in years, but in the eons of chaos."

Cao Ya pondered that he had broken through to the fourth step of the Dao Lord of Life and Death in less than a Chaos Era. Given enough time, advancing to the edge of the Dao Integration stage would be a natural progression.

If he fails to achieve Dao integration in the future and his true spirit dissipates, then any war will be irrelevant to him.

If one achieves the Dao and their combat power increases rapidly, they will undoubtedly be able to intervene in a cosmic war and fight a bloody battle on a local battlefield!

"There's no need to rush my advancement. I can proceed slowly and gradually. Once my other self has truly become a six-star existence, undergoing a transformation in the essence of life, possessing a unique foundation, and solidifying its base, I will also experience a qualitative change... At that time, it won't be too late to try to merge with the Dao, and I'll have a greater chance of success!"

Cao Ya thought to himself that Cao Ya from the [Sacred Ruins] universe, who entered the system space at the same time as him, as well as his counterparts from the [Primordial] universe, [Immortal Gourd] universe, [Peerless One] universe, and [Stellar Transformation] universe, had all reached the advanced level of the five-star level, very close to the six-star level. Who knows when they might break through to the next level and become awe-inspiring throughout the world!

Through the transformation of others, the essence of life evolves, and perhaps the possibility of achieving harmony with the Dao increases by one or two percent!

"Now that we have the cheat code of the system space, we need to be at least 80% or 90% sure before we can take action!" Cao Ya muttered to himself. The situation was different now. Before, 20% or 30% was enough to take a gamble, but now it was several times higher. The minimum requirement was at least 80% or 90%!

As for perfection... that's impossible to achieve; after all, nothing in this world is perfect!

Soon after, Cao Ya stepped out of the cosmic passage and finally left the alien universe. However, instead of returning to the Flame Dragon Domain, he descended upon the Yu Xinghai.

In the dark void, Cao Ya's figure appeared out of thin air, with spacetime fluctuations behind him, but they quickly disappeared.

"Is this the Yu Xinghai, the most forbidden land in the Yanlong Domain?" Cao Ya looked around.

According to the information, Yu Xinghai said it was a forbidden land, but in reality, it was boundless in area and even larger than the entire Yanlong Domain!

This is only the area that has been explored. If we include certain special places that make the emperor wary and dare not go deep, the area is undoubtedly two or three times larger!

"Boundless darkness—normally speaking, to cross it, one would need at least an Eternal Emperor!"

Cao Ya sighed. In the vast and chaotic universe, the distance between any two realms or different universes is extremely far. Even if one were to tear through the void to travel, it would take many chaotic eras.

Even the strongest Dao Lord of Life and Death, even a super prodigy comparable to an ordinary Holy City Lord, has a limit to his lifespan. It is 108,000 Chaos Eras, but not as immortal as an Emperor.

Therefore, the Dao Lord of Life and Death will not leave the realm or other universe without authorization, while the Eternal Emperor can do so.

After all, once 108,000 Chaos Eras have passed, for an Emperor, almost all his relatives and friends have died, so he doesn't have much to miss.

To reverse time and resurrect the dead is not something an ordinary emperor can accomplish!

Unless one passes away in the chaotic world, even if one uses great supernatural powers to bring the dead back to life, another lifespan will come. If one cannot live forever, there is still only one way out: death.

Moreover, many emperors are being hunted down by second-level and the most powerful Dao Lords, who want to make a name for themselves and be remembered in ancient history. In such a dangerous situation, they either have to seek refuge with a powerful figure or choose to leave and venture into the boundless darkness!

Cao Ya's previous journey to the other universe and his departure were both orchestrated by the Dominator, who opened a spacetime portal. The same applies to Ji Ning and the others.

"In fact, under the rule of the Sovereign, even the Lord of a Holy City has more than enough resources to support his cultivation in another universe or realm. There is no need for him to risk venturing into the boundless darkness!"

Cao Ya thought to himself, "This boundless darkness, though vast and empty, could very well harbor some terrifying things!"

The remnants of ancient wars are not limited to battlefields on all sides. It is not unusual for Dao traces and formations of the Dominator level to appear occasionally.

Even if it's a trace left by a supreme being, with a bit of luck... or rather, with a bit of bad luck, it's not impossible to encounter it!

At this moment, Cao Ya gazed into the distance, and in the depths of the dark void, a bright and dazzling light shimmered faintly, so beautiful and captivating that it made one's heart tremble.

"First, look at the map to determine your location and where you are before you take off."

Cao Ya took out the map of Yu Xinghai that he had collected from the magic treasure in the cave. After all, he was the overlord of Mingguang Domain and knew the reason for the formation of Yu Xinghai. Naturally, he would not ignore it and would be on guard.

However, even the Sovereign must be extremely cautious around Yu Xinghai, so those below him must tread on thin ice, as a slight misfortune could cost them their lives.

In most cases, even when the Eternal Emperor and the Dao Lord of Life and Death travel, they only stay on the outskirts of the Yu Xinghai Sea and do not venture deep into it.

"Damn it!" Cao Ya carefully examined the map, his face darkening as he cursed under his breath.

His landing point was actually located in the inner perimeter of Yu Xinghai. To leave the First Forbidden Zone and return to the Flame Dragon Domain, he would basically have to cross half of the domain!

Even a ruler could encounter danger at such a great distance, let alone him.

"Black Emperor, Venerable Dan, your misunderstanding has really caused me a lot of trouble!" Cao Ya said, annoyed.

Cao Ya was grateful for the blessings bestowed upon him by the three ancient star lords, and he understood the intention behind such an arrangement. It was a well-intentioned and painstaking effort, hoping for his eternity. But the problem was... he really didn't need it!

"This is what they mean by doing good but ending up with bad results!" Cao Ya sighed three times, but he couldn't blame the Black Emperor and the Dan Venerable. After all, anyone who saw his situation would misunderstand.

However, he had to keep the true existence of the system space a secret and could not reveal it to outsiders... This undoubtedly led to the current situation and the problems that have arisen!

"There's no point in overthinking. Let's think about how to leave Yu Xinghai," Cao Ya muttered.

Fortunately, he had already broken through to the fourth step of the Life and Death Dao Lord in the Three Leaves Realm, and his own strength was already very strong. With the addition of various extraordinary systems, he actually broke through the threshold of the Holy City Lord and officially entered the middle level of the six-star level!

Although he is only an ordinary lord of a holy city, he is still incomparable to those powerful beings.

But this ability is already very outstanding. Cao Ya can sense and avoid some common risks in advance. Even if he can't dodge them, he is confident that he can cross them head-on!

Ultimately, this is a world of cultivation, and all crises stem from insufficient strength!

If he is the ruler, there are fewer risks to avoid; if he is the supreme being…

We could easily crush Yu Xinghai!

"I do have some understanding of the laws of space, and besides, techniques like [Dao Transmits to the Universe] can easily tear through the void." Cao Ya felt a little relieved; at least he could still maintain his travel speed.

Otherwise, relying solely on flight, it would take forever—perhaps tens of thousands of Chaos Eras—to fly out of the Yu Xing Sea!

If the Overlord locks onto the coordinates, it can directly traverse the boundless darkness and connect to other universes and realms!

Cao Ya may not have the power to rule, but he is still quite powerful as a lord of an ordinary holy city. Once he has located the enemy, he can kill them remotely even if he has to cross several territories!

"Buzz..." In the far distance, green light rose, piercing through the boundless darkness and shattering all paths!

"The Yin-Yang Wheel of Life and Death!" Cao Ya stared intently, his expression complex. Just now, it was thanks to this most famous "landmark" in the Yu Xing Sea that he had figured out his location.

However, it is not impossible that Venerable Dan had visited Yu Xinghai and observed the Yin-Yang Life and Death Wheel from afar, thus knowing the spatial coordinates.

"Swoosh!" Cao Ya raised his hand, tearing apart the void and forming a passage. Stepping into it, he easily traversed the area of ​​several territories, and reappeared in front of the Yin-Yang Life and Death Wheel!

Cao Ya looked up at the enormous, unusual celestial body in front of him, his expression one of awe!

About a trillion miles away, there is a huge celestial body that stretches across the boundless darkness, awe-inspiring in all directions!

Those were two extremely terrifying vortexes. One was emerald green, flowing with endless life force, and spread across hundreds of territories. Anything that entered it would immediately have all its life essence absorbed, instantly disintegrate, and turn into ashes.

The other vortex was a deep black, and it was also frantically devouring everything, distorting the Great Dao and causing spacetime to become disordered!

The most unique thing is that these two vortexes of life and death, although extremely destructive and annihilating everything within their range, are symbiotic with each other, do not interfere with each other, and even help each other, increasing each other's power!

"The Yin-Yang Life and Death Wheel is the most famous celestial body in the Yu Xing Sea! It instills fear in the six major forces of the Yanlong Domain, including the Dao Alliance and Mangya Kingdom, yet they are powerless against it and can only let it run its course!"

Cao Ya whispered, his expression quite solemn.

In its earliest form, the Yin-Yang Wheel of Life and Death was smaller than a single territory, but now it is larger than the sum of hundreds of territories!

In short, the Yin-Yang Wheel of Life and Death, those two vortexes of emerald green and dark darkness, devour all things and shatter the Great Dao, are constantly growing and getting bigger!

If it continues to grow at this rate, the Yin-Yang Cycle of Life and Death will one day affect the Flame Dragon Domain!

In other words, the Flame Dragon Domain is destined to be destroyed, and that time is drawing ever closer!

"The three rulers of the Flame Dragon Domain and the lords of various holy cities, when faced with a life-or-death crisis, joined hands to enter the Sea of ​​Despair, hoping to combine the power of all forces to dismantle the threat of the Yin-Yang Wheel of Life and Death..."

Cao Ya gave a wry smile. Judging from the result, the combined efforts of so many experts still failed.

There was no way around it; the Yin-Yang Wheel of Life and Death could melt all the energy in the universe, and even the Great Dao that ruled over it could not be damaged in the slightest. It would only increase its power and speed up its formation.

After a series of fruitless attempts, the three rulers and the lords of the holy city, however unwilling, had no choice but to give up and marked the traces of the Yin-Yang Life-Death Wheel on the maps drawn by various forces!

Of course, only the Eternal Emperors are troubled by this. After all, at the growth rate of the Yin-Yang Life and Death Wheel, it would still take a million Chaos Eras to spread out of the Yu Xing Sea and sweep across the Yanlong Domain!

Below the level of an Emperor, the lifespan is only 108,000 Chaos Eras, and one cannot sense this crisis until death.

Therefore, even though the Flame Dragon Realm is destined to perish, most cultivators are not very concerned.

"If eternity were possible, then we would surely witness the day when the Yin-Yang Cycle of Life and Death destroys the realm..."

Cao Ya sighed softly, but it wasn't a particular concern.

If one truly succeeds in achieving Dao integration, their strength will undoubtedly increase by leaps and bounds, becoming incomparably powerful.

Even in the face of such a catastrophe, there is a way out.

At worst, he could unleash his unparalleled divine power to create a vast cave world, leading all the races of the Bright Light Domain, gathering all the emperors, wandering through the boundless darkness, and seeking other realms or universes to settle down again.

The Dark Kingdom, one of the six major powers in the Flame Dragon Domain, is one such example. Their homeland was destroyed, they were forced to wander, and finally chose the Flame Dragon Domain to start a new life.

Despite being rejected by local forces, the traditions of their hometown have been preserved.

"To dismantle the Yin-Yang Cycle of Life and Death, even a Super Ruler cannot do it; only a Supreme Being can!"

"Even in its later stages of evolution, the Supreme Being would find it troublesome, unable to easily flatten this celestial body!"

Cao Ya shook his head. To ask the Supreme Being for help, no one in the Flame Dragon Domain has the face to do so so far.

The Supreme Being, as the leader of the cultivators, rarely gets involved in affairs, ignores all kinds of battles, and is equally too lazy to deal with all kinds of natural dangers.

After all, it's all about natural evolution; how could a supreme being possibly cast their gaze upon it and pay attention to it?

Furthermore, pressure is what drives more and more cultivators to rise up and help fight against invaders in the wild and chaotic universe!

Therefore, even the Supreme Being did not stop the rampage of evil.