629: Chapter 629 The Four Secrets of the Heavenly Demon!

The darkness attribute that had only just undergone Awakening now felt as if a deeper layer of power had been injected into it.

That power gave his Mental Energy an indescribable, mysterious quality.

A long time passed.

Qin Yan finished his Cultivate session, and his Mental Energy slowly withdrew from that dark world.

Qin Yan took a deep breath, opened his panel, and checked his Mental Energy.

[spirit: 205 Hz]

Two hundred and five Hz!

It had increased by a full five Hz!

Qin Yan looked at the number, a flash of pleasant surprise in his eyes.

One must know that before his Mental Energy reached two hundred Hz, trying to increase it by even one Hz was difficult enough to kill him.

He had even doubted whether he was naturally unsuitable for cultivating Mental Energy.

But now, a single insight had increased it by five Hz.

"So... just how deep is this Darkness Profundity?"

Qin Yan looked at the dark chains floating above the Devilish Qi black hole and fell into deep thought.

If it were only a few thousandths of Darkness Profundity, his Mental Energy would still increase, but definitely not this quickly.

With that level of increase, it would be good if he gained even 0.1 Hz.

Yet he had gained five Hz in one insight.

This indicated that the amount of Darkness Profundity contained within these dark chains far exceeded his imagination.

Unfortunately, he was not the master of these Profound Truths.

Although these Darkness Profundities were stored in his body and he could use them to Cultivate his Mental Energy, their true master was Xiao Hei—the Nine Nether Spirit-Devouring Demon Tree.

However, even though Xiao Hei was the master of these Profound Truths, it could not control so many of them, nor did it know their true depth.

"Forget it, I won't overthink it. I'll come here for an hour every day to Cultivate and improve my Mental Energy cultivation."

Qin Yan silently formulated a cultivation plan. Just as he was preparing to leave the Blood Demon Nest, a telepathic message suddenly stopped him.

"Qin Yan, wait."

It was Xiao Hei's voice.

Qin Yan turned his gaze toward the figure deep within the Blood Demon Nest.

He saw that Xiao Hei's body had already reached over ten zhang in height, standing like a towering ancient tree in the very center of the Blood Demon Nest.

Its trunk was as thick as a pillar and pitch black all over.

On its branches, mysterious runes flickered in and out of sight, sometimes brightening and sometimes dimming, flashing rhythmically like breathing.

Around Xiao Hei's entire body, Devilish Qi surged powerfully like a churning black ocean, wave after wave spreading out in all directions.

Compared to a few months ago, Xiao Hei's transformation was earth-shaking.

"Xiao Hei, what is it?"

Qin Yan withdrew his gaze and asked.

He knew Xiao Hei wouldn't stop him for no reason; there must be something important.

"Qin Yan, take this."

Xiao Hei's branches swayed.

Immediately, a streak of black light shot out from Xiao Hei's body, fast as lightning, heading straight for the space between Qin Yan's eyebrows!

That black light was pitch black, yet it did not seem sinister; instead, it carried a deep, pure, and soul-soothing aura.

Seeing this, Qin Yan did not block it.

He allowed the black light to sink into his forehead.

The black light condensed within Qin Yan's mind.

Countless black specks of light gathered from all directions like a hundred rivers returning to the sea, condensing, weaving, and undergoing Fusion in the center of his Sea of Consciousness.

In the blink of an eye, a black book took shape.

The book was about the size of a palm and entirely pitch black. The cover was made of some unknown material that felt ice-cold and smooth, like touching the freezing waters of the deep night.

On the cover, four large characters were clearly visible—

Four Secrets of the Heavenly Demon.

Those four characters were written with powerful, vigorous strokes, and every line seemed to contain some unfathomable mystery.

"Four Secrets of the Heavenly Demon..."

Qin Yan murmured to himself, his Mental Energy involuntarily jolting.

The Four Secrets of the Heavenly Demon—he had never heard of them!

However, he did know the two words "Heavenly Demon"!

The Heavenly Demon was the founder of the Demon Race and the first demon in heaven and earth.

Before the Era of the Demonic Path, the concept of a "Demon Race" did not exist in the world.

It was the Heavenly Demon who was born from the endless darkness, understood the true essence of darkness, and pioneered the lineage of the Demonic Path.

He was the primogenitor of the Demon Race, the ancestor of all demons, and the Dominator of darkness.

At the same time, he was also the most powerful demon in the Demon Race!

According to the records in later classics, the Heavenly Demon's strength had already reached a level above the True Emperor!

What kind of level was that? Qin Yan didn't know.

He only knew that a True Emperor was already an existence standing at the Peak of the Heavens and Myriad Worlds.

And anything above the True Emperor was already a Realm that exceeded his scope of cognition.

And the book in his hand was called the Four Secrets of the Heavenly Demon.

Anything that could be associated with the words "Heavenly Demon" could not be weak, no matter how much it was watered down!

Qin Yan suppressed the excitement in his heart, took a deep breath, and slowly submerged his Mental Energy into the Four Secrets of the Heavenly Demon.

The pages flipped open.

Dense text, patterns, and runes flooded into his mind like a tide.

He read hungrily, unwilling to miss a single word or sentence.

Half a quarter of an hour later.

Qin Yan's Mental Energy slowly withdrew from the Four Secrets of the Heavenly Demon.

The pages closed, floating in his mental world while emitting a faint, ghostly glow.

At this moment, shock still lingered in Qin Yan's eyes, unable to subside for a long time.

He had finished viewing all of the Four Secrets of the Heavenly Demon.

These four secret techniques were—Shadow Clone, Myriad Manifestation Disguise, Void Guardian, and Dark Enslavement.

Looking first at the first secret—Shadow Clone.

This was the one Qin Yan considered the most powerful among the four secrets.

The Shadow Clone could condense a Clone with an initial Mental Energy strength exactly the same as the main body.

This Clone possessed an independent consciousness and could think, judge, and act on its own, yet its core will remained under the absolute control of the main body.

The most critical point was—this Clone could grow by absorbing the darkness power in the world.

Darkness is everywhere.

Night is darkness, shadows are darkness, the abyss is darkness, and even the dark side of the human heart is darkness.

As long as there is darkness, the Clone can continuously become stronger.

And everything the Clone possesses—whether it is the improvement of Mental Energy, the insight into darkness, or the experience accumulated in battle—can be perfectly synchronized to the main body!

What did this mean?

It meant that whoever possessed this Shadow Clone essentially had a "mental cheat" that was cultivating at all times!

While the main body was eating, sleeping, training, or fighting, the Clone could hide in the shadows and Cultivate silently.

While the main body was gaining insights into other attributes or cultivating other Cultivation Techniques, the Clone could focus on the accumulation of dark spirit.

Over time, this gap would become incredibly massive.

"This is simply cheating..."

Qin Yan marveled in his heart.

Next was the second secret—Myriad Manifestation Disguise.

Myriad Manifestation Disguise, as the name implies, was a secret technique for disguise and concealment.

It had two functions.