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Nine Heavens Mysterious Demon Palace!

A colossal palace, suspended in the void, stood there. Song Yu followed closely behind the Demon Emperor and slowly appeared in front of the palace.

The enormous palace was completely empty.

"This palace is called the Nine Heavens Mystic Demon Palace!"

"This was my former residence. Today, my Nine Heavens Profound Demon Palace has indeed become what it is today."

A subtle mockery appeared on the Demon Emperor's lips. He slowly flew to the front of the Nine Heavens Profound Demon Palace, and the demonic energy in his hand began to boil. Then, the demonic energy in his hand quickly transformed into an even larger demonic weapon!

"Swing with all your might and see if you can split my Nine Heavens Demon Palace in two!"

The Demon Emperor spoke calmly, seemingly unconcerned that Song Yu would split his Nine Heavens Profound Demon Palace in two.

"I?"

"Okay, I'll give it a try!"

Song Yu was stunned for a moment, then slowly rose up. He raised his arms slightly, and a large amount of spiritual energy began to gather rapidly in his palms!

Gradually, this spiritual energy formed an extremely wide giant blade in front of him. As Song Yu moved his hand, the enormous blade emitted a dazzling and intense light.

Boom! !

As the spiritual energy fluctuated, Song Yu's fingertips trembled rapidly, and the massive blade trembled slightly, emanating a subtle energy.

"Execute him!!!"

Song Yu gave a light hum, and the massive blade in front of him trembled slightly. Under Song Yu's guidance, the massive blade slashed forward fiercely!

boom! !

With a deafening roar, the Nine Heavens Profound Demon Palace trembled slightly, yet not a single mark was left on it. The massive blade vanished as if it had never existed!

Song Yu's pupils contracted slightly as he stared at the Nine Heavens Profound Demon Palace in utter astonishment. This move of his, even if not his full strength, could still instantly kill an ordinary ruler.

However, he never expected that he wouldn't even be able to leave a trace. How could he not be shocked by such a terrifying defensive power?

"Even if you use all your strength, you can't break through it. If you don't believe me, just try it."

The Demon Emperor beside him had clearly anticipated this outcome.

"The Evil Emperor enhances your divine weapon's combat power, but I will comprehensively enhance you as a person, including power, defense, speed, and various divine abilities based on laws!"

The Demon Emperor laughed, his voice suddenly rising in pitch.

"Aren't you going to start already?"

Song Yu's gaze sharpened slightly, and he nodded in deep agreement. This time, he focused all his energy on condensing a divine sword identical to the Chaos Immortal Sword, constructed from a large amount of spiritual energy, which slowly condensed in front of his chest.

Without the slightest delay or hesitation, Song Yu slowly extended his palm and tightly grasped the Chaos Immortal Sword. The Chaos Immortal Sword trembled slightly, and under Song Yu's control, it slashed down fiercely!

A fierce sword strike, imbued with unstoppable force, slashed down!

Bang bang bang! !

After a series of sword strikes, the Nine Heavens Profound Demon Palace trembled slightly, but the result remained unchanged.

The Nine Heavens Profound Demon Palace merely trembled, but ultimately, it did not cause him any harm.

"Ok?"

To be honest, Song Yu had a premonition a moment ago. He had a feeling about the answer, but now it was different. He gave it his all, but the final result still far exceeded his expectations.

The sheer hardness of the Nine Heavens Mystic Demon Palace...

It’s too incredible!

"It's no use. Keep trying, don't rush, take your time!"

The Demon Emperor smiled and said, clearly having expected this answer.

Song Yu nodded calmly and said nothing more.

He wielded the sword in his hand, swinging it move by move, but each swing failed to leave any mark on the Nine Heavens Profound Demon Palace. Even so, Song Yu showed no sign of stopping!

Time flies, and life goes by swiftly...

With the aid of spatial rules, the flow of time here becomes extremely fast.

Meanwhile, Song Yu's frequency of wielding the hybrid advanced engine increased, and finally, the traces on the surface of the Nine Heavens Profound Demon Palace remained for a short period of time.

Although the time frame is very short, it is still real!

Song Yu's eyesight cleared slightly, and he could see clearly through them.

Although he appears to have changed nothing, only he himself probably knows that his actual combat power has increased significantly, something that ordinary cultivation cannot achieve.

This made Song Yu even more respectful of the Demon Emperor.

"Senior Demon Emperor, what should I do next?"

Song Yu took a deep breath and said with some excitement.

"Keep going, this is far from enough, we must split the palace in two!"

The Demon Emperor shook his head in disappointment.

Unbeknownst to them, the Evil Emperor had also appeared beside the Demon Emperor.

"I'm somewhat disappointed in the person you chose. After so much time, they've only grasped this much. Such progress is truly..."

The Evil Emperor rolled his eyes at the Demon Emperor speechlessly, "It's because your requirements are too high and the time is too tight. His son does have the talent, but unfortunately, the time for cultivation is too short!"

"There's no other way but to let him take the place. As for the outcome, that's beyond our control. I believe it won't be long before the Lord of Darkness truly enters eternity."

"It's also possible that we've already entered eternity..."

Whenever they thought of this, the two fell silent.

Eternity has now completely exceeded their control. Faced with such a powerful being, all they can do is let nature take its course.

Regardless of the outcome...

Those were things they had no choice but to endure!

"Most importantly, the Lord of Shadow Prison is the former Lord of Darkness of the Dark Universe. If he is there, the difficulty for us will undoubtedly increase significantly!"

The two chatted casually, and time slipped away unnoticed as they watched.

One day, Song Yu slashed down fiercely with his sword, a sharp and terrifying strike that charged in with unstoppable force!

boom! !

The Nine Heavens Profound Demon Palace was instantly cleaved in two by this sword, and then transformed into pure demonic energy, which quickly surged into Song Yu's body!

Sensing the surge of this extremely domineering demonic energy, Song Yu's pupils narrowed slightly as he stared intently ahead!

Faced with the influx of these domineering demonic energies, Song Yu did not resist at all. Instead, he relaxed and allowed these demonic energies to quickly invade his body!

Boom!

As the demonic energy trembled, terrifying energy began to boil wildly.

Song Yu's strength increased rapidly in the blink of an eye!

The Nine Heavens Profound Demon Palace was shattered by Song Yu's sword, and eventually turned into a sky full of black mist, surging towards Song Yu like a tide.

He instinctively closed his eyes, letting the pure demonic energy envelop his entire body. At first, the demonic energy felt like countless fine needles, pricking his skin with a dull ache, but then it gradually became warm, seeping into his body through his pores.

Song Yu could clearly feel that every wisp of demonic energy was colliding and merging with his own spiritual energy.

"Don't resist, let the demonic energy completely permeate your limbs and bones." The Demon Emperor's voice rang in my ears.

Song Yu nodded, trying to relax his mind and sink his consciousness into his body to observe the trajectory of the demonic energy.

He discovered that as demonic energy continued to pour in, the chaotic power within his body grew stronger and stronger. The originally singular spiritual energy was gradually stained gray-black, filled with a mysterious and powerful aura.

Time passed slowly, and Song Yu's aura gradually increased. The Demon Emperor and the Evil Emperor remained by his side, occasionally exchanging whispered conversations.

"It's already quite impressive that he's managed to hold on until now," the Evil Emperor said with a hint of approval in his voice.

"This is just the beginning," the Demon Emperor replied, his gaze fixed on Song Yu. "The demonic energy of the Nine Heavens Profound Demon Palace contains ancient laws, and he still needs time to digest it."

Song Yu's body trembled slightly, and fine beads of sweat appeared on his forehead.

He felt as if he was undergoing a transformation, with old forces dissipating and new forces being born.

As the power of chaotic demonic arts flowed through his body, his perception of space and time became more acute, as if he could touch the pulse of heaven and earth.

After an unknown amount of time, Song Yu slowly opened his eyes.

He was surrounded by a faint layer of chaotic demonic flames, his eyes were clear, and his temperament was different.

He could clearly sense that his strength had increased several times over, and his understanding of the laws had also deepened.

"Thank you, Senior Demon Emperor, Senior Evil Emperor." Song Yu stood up and bowed.

The Demon Emperor smiled slightly: "No need for formalities, this is what you deserve. But the real challenge is yet to come."

The Evil Emperor said, "The Lord of Darkness and the Lord of Shadow Prison will soon notice your changes, so we must prepare in advance."

Song Yu remained silent for a moment, then his gaze became firm: "This junior understands!"

In the days that followed, Song Yu remained in the true Nine Heavens Profound Demon Palace, cultivating the power of the Chaos Demonic Path under the guidance of the Demon Emperor.

"The Chaotic Demonic Path is neither simply demonic nor simply chaotic, but a perfect fusion of the two." The Demon Emperor sat on a black boulder and said slowly, "It has both the inclusiveness and creativity of chaos and the domineering and destructive nature of the demonic path. You must learn to find a balance between the two."

Song Yu listened attentively, circulating the chaotic demonic power within his body while comprehending the Demon Emperor's words. He discovered that as his cultivation deepened, his control over his power became increasingly precise, and the originally violent demonic energy became docile, able to transform into various forms at will.

The Evil Emperor would occasionally give Song Yu some pointers.

"The demonic path is not the evil path; the key lies in the user's mindset," the Evil Emperor said. "Power itself is neither right nor wrong; what matters is how you use it."

Song Yu humbly learned from the experiences of the two Emperor-level powerhouses. His strength steadily improved, and the Chaos Immortal Sword became increasingly powerful, with the runes on its body shining even brighter, faintly exuding an aura of dominance over the world.

However, the peaceful days did not last long.

One day, Song Yu was cultivating when he suddenly sensed a powerful dark aura coming from the depths of the distant universe. The aura was filled with malice and destruction, which made him uneasy.