Lin Yuan was surprised. The calling sensation was faint, as if it could disconnect at any moment, but it also felt indestructible.
Extremely contradictory.
"That direction?"
Lin Yuan looked toward the depths of the starry sky. He could feel that the call was coming from there.
"Is it the Mysterious Yellow Secret Realm?"
Lin Yuan's expression was serious. The direction he was looking at included many star domains and star alliances.
The Mysterious Yellow Secret Realm was just one of them.
But Lin Yuan instinctively felt that it was the Mysterious Yellow Secret Realm calling him.
"Is it because I practiced the 'Mysterious Yellow' evolution path?"
Thoughts surged in Lin Yuan's mind.
Since the discovery of the Mysterious Yellow Secret Realm, countless human evolvers and alien powerhouses had explored it.
But no one had ever been called by the Mysterious Yellow Secret Realm.
Lin Yuan didn't think he was particularly special. The only possibility was the 'Mysterious Yellow' evolution path.
This was his only connection to the Mysterious Yellow Secret Realm.
Although Lin Yuan hadn't made the 'Mysterious Yellow' evolution path his core evolution path, it was one of the many evolution paths he practiced, and his body had the 'Mysterious Yellow' power running through it.
"The evolution path my teacher obtained is more closely linked to the Mysterious Yellow Secret Realm than I thought."
Lin Yuan thought.
Just because he practiced the 'Mysterious Yellow' evolution path, a call from countless light-years away reached him?
And this call could ignore all isolation measures on the home planet, an astonishing feat.
Of course, it might just be a faint calling sensation without any substantial power, but it was still incredible.
"Mysterious Yellow Secret Realm?"
Lin Yuan squinted his eyes.
He had some interest in this cosmic secret realm, and now, feeling its call, Lin Yuan wanted to know the source of the call.
Was it the secret realm itself? Or something within it?
"It seems I need to enter the Mysterious Yellow Secret Realm and take a look."
Lin Yuan made up his mind.
In fact, even sixth-rank evolvers with the ability to travel through space would explore various secret realms.
There were many semi-public secret realms within human civilization's territory. These secret realms existed in relatively shallow spatial layers, reinforced by powerful evolvers to maintain long-term access channels to the main universe.
Evolvers could enter these realms by paying a certain price.
This was something almost all evolvers would do.
Lin Yuan had reached the ninth rank without ever exploring a secret realm, making him an exception.
But now, the faint calling from the Mysterious Yellow Secret Realm made Lin Yuan want to explore it.
Regardless of the outcome, it wouldn't cost Lin Yuan much. There was no real risk of death; at worst, his primordial spirit could perish within the realm.
Given Lin Yuan's foundation, recondensing a new primordial spirit wouldn't be difficult.
"Every time the Mysterious Yellow Secret Realm opens, it remains accessible for a hundred years. When the time is up, it closes, and any external beings still inside will instantly die."
"As for the cause of death? It's unknown. Even those who leave avatars inside while keeping their true bodies outside don't know how their avatars die."
"So, the first rule of entering the Mysterious Yellow Secret Realm is to leave before it closes."
Lin Yuan thought to himself.
If the time limit was exceeded, the avatar's death was one thing, but others couldn't easily recondense a primordial spirit like Lin Yuan.
The key was that any gains within the realm would be left behind.
That would be a double loss.
Information about the 'Mysterious Yellow' Secret Realm flashed through Lin Yuan's mind. This was the advantage of being backed by a peak race.
If a strong individual from a weak or ordinary race entered the Mysterious Yellow Secret Realm, their chances of gaining and returning safely were slim.
They wouldn't know the many secrets and taboos of the realm, and might die in some corner.
Of course, human civilization's detailed information about the Mysterious Yellow Secret Realm was obtained through the sacrifices of countless predecessors.
The next day.
Lin Yuan left the Green Mountain summit, ending his journey to the Eternal Spring.
"If it weren't so costly to soak in the spring, I would have brought my two primordial spirits to soak too." Lin Yuan shook his head.
Although the Eternal Spring's effects were not as good as the mysterious gourd, the enhancement of body potential was rare.
But the cost was too high, requiring five million merit points? That was the internal price for human civilization.
"In the Human Civilization Alliance, merit points can achieve almost anything."
Lin Yuan realized the importance of merit points again. Increasing citizenship levels was just the most cost-effective use.
Many resources within human civilization couldn't be obtained with civilization coins or universe coins. Even bartering was useless; only merit points were the currency.
With enough merit points, one could even buy the twelve-star universe wonder, the Eternal Spring.
But that required an astronomical amount of merit points.
"Time to go."
Lin Yuan entered the spatial channel to leave the home planet, arriving at the transit planet in an instant.
"Come to think of it, I have a property in the Central Star Domain?"
Lin Yuan seemed to remember something, glancing in a certain direction.
Calling it a property wasn't accurate; it was more of a planet.
A research planet.
After becoming an advanced scholar, Lin Yuan automatically gained a research planet in the Central Star Domain.
The value of a research planet far exceeded that of a high-level planet, especially in a place as valuable as the Central Star Domain.
Moreover, the research planet came equipped with various facilities, computational machines, and a team of professors and experts.
Lin Yuan's orders for this research planet were to tackle various difficult problems published by human civilization, using the planet's computational power to slowly solve them.
To earn corresponding merit points.
If Lin Yuan personally oversaw the research planet and solved human civilization's various problems, he would earn even more merit points.
But it wasn't necessary. Researching human civilization's numerous problems? That would be a waste of Lin Yuan's Unrivaled Insight.
Ten months later.
Lin Yuan traversed a significant portion of human civilization's territory, returning to the Milky Way Star Domain.
"Finally back."
Lin Yuan took steps of five to six hundred light-years, arriving at the Milky Way main star in no time.
"This trip to the Central Star Domain took nearly two years." Lin Yuan appeared silently in the Star Lord's hall, exchanging glances with the Yin primordial spirit, and sat cross-legged.
This was despite Lin Yuan continuously using the Great Teleportation technique.
If he had traveled by spaceship, it would have taken five or six years to return.
"Spatial layers."
Lin Yuan closed his eyes slightly, sensing the spatial layers within his inner world.
Although most of the past two years were spent traveling, Lin Yuan hadn't neglected his cultivation. In these two years, he had developed forty-three thousand spatial layers.
When Lin Yuan first entered the ninth rank, he had only developed thirty-nine thousand spatial layers.
In less than two years, he had developed an additional four thousand spatial layers. If other newly ascended ninth-rank evolvers knew this, they would be insanely jealous.
"Using dozens of ordinary cosmic powers, over ten advanced cosmic powers, and one origin/primordial-level cosmic power to reach the ninth rank, developing spatial layers is almost like playing."
Lin Yuan shook his head slightly. He estimated that within ten years, he could reach the nine-rank, hundred-thousand-layer stage, maybe even sooner.
Other ordinary ninth-rank evolvers initially develop only a few spatial layers. Later, each additional spatial layer is hard-earned, taking tens of thousands to hundreds of thousands of years to reach ten thousand layers.
"While my cultivation is easy, other martial evolvers will still need to develop spatial layers slowly when they reach the ninth rank."
Lin Yuan suddenly thought.
Even though he hadn't reached the peak of the ninth rank, he needed to consider the martial path's ninth-rank chapter for future generations. Most martial evolvers couldn't replicate Lin Yuan's path of comprehending dozens of cosmic powers.
In fact, most eighth-rank martial evolvers couldn't even comprehend a cosmic power.
Without the boost from cosmic power, martial ninth-rank evolvers had no significant advantage in developing spatial layers compared to other ninth-rank evolvers.
To reach the ninth rank, an evolver's path must be incredibly refined. The martial path's ninth rank isn't vastly superior to other paths.
Except in potential.
The three goddesses rated the martial path's eighth rank highly due to its potential and the higher number of eighth-rank evolvers mastering cosmic power compared to other paths.
"And the time rule, I've been comprehending it for the past two years, and I think I'm close to entry." Lin Yuan thought.
Comprehending the time rule at the eighth rank and the ninth rank was vastly different.
Now, Lin Yuan could sense the fluctuations of the time rule, deepening his understanding with each passing moment.
"Entering the time rule will allow some control over time acceleration, enhancing combat capabilities."
Lin Yuan thought.
Reversing time and moving against the current is an ability gained after fully comprehending the time rule.
Time acceleration and other methods can be used with a certain understanding of the time rule.
"Over the years, I've accumulated sixty strands of boundary-breaking power."
Lin Yuan's consciousness dived into his mind, looking at the Gate of Myriad Realms, and sensed it briefly.
The thirty-thousand-meter-long permanent spatial rift on battlefield B0001 had boosted his accumulation rate of boundary-breaking power to one strand every one hundred fifty days.
Over the years, Lin Yuan had broken through to the ninth rank, and including the time for adjustment, it had been twenty years, giving him thirty strands.
Together, he barely had over sixty strands.
"Sixty strands of boundary-breaking power can support one physical transmigration."
Lin Yuan smiled.
Physical transmigration is not just different from consciousness descent but is almost an unbeatable escape method.
Even against the strongest ones, who can occupy multiple spatial layers in the main universe, they can't chase across dimensions.
So far, the only method capable of transcending dimensions Lin Yuan had seen was through the Gate of Myriad Realms.
"Go to battlefield B0001 and swap the Yin primordial spirit with the Yang primordial spirit."
Lin Yuan looked at the Yin primordial spirit and instructed.
Now, the Yin primordial spirit had caught up with the true body in terms of absorbing the liquid from the mysterious gourd, so it was time for the Yang primordial spirit.
Battlefield B0001.
The Yang primordial spirit of Lin Yuan disappeared silently.
The Yin primordial spirit took its place, looking at the thirty-thousand-meter-long permanent spatial rift not far away.
"It's incredible."
"Is this the level of an attack from the strongest ones?"
Lin Yuan marveled at the permanent spatial rift.
Before the ninth rank, Lin Yuan could only see the surface of this permanent spatial rift.
But now, as a ninth-rank being, he could see through multiple spatial layers and discovered that this permanent spatial rift not only tore through the main universe but also the spatial layers within.
Countless spatial layers were affected.
At least the forty-three thousand spatial layers Lin Yuan observed were like this.
Lin Yuan imagined a long-ago moment when an evolver wielding a supreme weapon casually launched an attack.
That attack was overwhelmingly powerful, without any technique, tearing through all spatial layers regardless of where one hid.
This was the power of the strongest ones!
Milky Way Main Star.
The Yang primordial spirit returned smoothly.
After breaking through to the ninth rank, Lin Yuan's travel speed greatly improved. Although the two primordial spirits didn't have the world tree to offset spirit consumption, they were still far superior to before.
The distance from battlefield B0001 to the Milky Way Star Domain was much shorter than from the Milky Way Star Domain to the Central Star Domain.
"Begin absorbing."
Lin Yuan handed the mysterious gourd to the Yang primordial spirit.
He himself closed his eyes and meditated.
In half a month.
The Yang primordial spirit had absorbed the liquid in the mysterious gourd up to the fifth type, the green liquid, catching up with Lin Yuan's progress.
Rumble.
Within the Yang primordial spirit, the flame world expanded, developing layer upon layer of spatial dimensions, reaching over a hundred million miles in size.
"Not bad."
Lin Yuan glanced at the Yang primordial spirit.
Although after comprehending the complete spatial rules, the size of the inner world was no longer limited by the rules mastered, each would still reach a diameter of ten million miles.
However, the type of rule mastered still affected the 'nature' of the inner world. The Yang primordial spirit's inner world was a flame world, while the Yin primordial spirit's inner world was a cold world.
As for Lin Yuan's true body, its inner world was like a normal world.
"I wonder if transforming the Yang primordial spirit back to an illusory state, returning to the primordial spirit form, would retain the inner world's size?"
Lin Yuan thought.
"Never mind, I'll try that later."
Lin Yuan refocused his thoughts.
"Let's check out the Mysterious Yellow Secret Realm."
The Yang primordial spirit's body was condensed exactly like Lin Yuan's true body, practicing numerous evolution paths, including the 'Mysterious Yellow' evolution path.
Now, the call from the 'Mysterious Yellow' Secret Realm was felt not only by Lin Yuan's true body but also by the two primordial spirits.
Whoosh.
The Yang primordial spirit stood up.
It disappeared from where it stood.
...
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