The sigh seemed extremely sudden in the quiet cave. Su Zimo’s heart skipped a beat and he tensed up with a guarded expression.

The sigh clearly came from a man and not Tang Ziyi.

Could there be someone else in the cave?

He had conversed with Tang Ziyi in the cave for so long but he did not notice this person’s existence?

Su Zimo looked at Tang Ziyi. The latter had a calm expression and there was nothing unusual about her, as though she had not heard the sigh at all.

Releasing his spirit consciousness, Su Zimo scanned the cave carefully but to no avail.

The sigh did not seem to have come from the cave. Instead, it sounded in his mind!

“Stop searching. I’m not there,”

The old and mysterious voice sounded in Su Zimo’s mind once more.

“Who are you?”

Su Zimo did not say anything and merely asked with his spirit consciousness.

“Who am I? Who am I…”

The mysterious person murmured softly but did not reply. He merely sighed emotionally. “To think that I would be able to see someone from Tianhuang Mainland after so many years…”

Su Zimo was shocked!

It had been more than a thousand years since he ascended to the upper world and he had never mentioned to anyone which minor chiliocosm he came from or Tianhuang Mainland.

However, this mysterious person exposed his background with a single sentence!

“Y-You…!”

Instantly, countless questions filled Su Zimo’s mind. He could not react in time and did not know where to start.

“You don’t have to be nervous,”

The mysterious person said, “I can recognize your background because I’m also from Tianhuang Mainland.”

Su Zimo was dumbfounded.

He had not expected to encounter someone from Tianhuang Mainland here!

Furthermore, the methods of this mysterious person seemed to have far surpassed the scope of a Black Immortal. There was a high chance that he was a senior from Tianhuang Mainland who ascended before him!

Of course, even so, Su Zimo was still extremely cautious and did not believe it easily.

“Even if you’re from Tianhuang Mainland, how did you recognize that I’m from Tianhuang Mainland?”

Su Zimo asked instead.

The mysterious person said, “The Great Chaos Essence Palm you used earlier was created by the Essence Emperor. He has his own legacy sect in Tianhuang Mainland called Chaos Essence Sect. I wonder if it’s still around.”

At that point, Su Zimo no longer had any doubts.

Anyone who could recount those past events accurately was definitely someone from Tianhuang Mainland!

Right then, the mysterious person continued, “I sensed a familiar aura from the sound domain secret skill you released earlier on. You should have cultivated a cultivation technique, the Void Thunder Manual.”

Su Zimo was even more surprised.

His Dragon Roar secret skill was indeed fused with some of the secret skills of Thunderclap Kill.

To think that this mysterious person would be able to deduce his cultivation technique with a single secret skill!

Just as Su Zimo was startled, the mysterious person continued, “I left the Void Thunder Manual in Tianhuang Mainland as a legacy before I ascended.”

“Ah!”

Su Zimo’s expression changed starkly as he bolted upright, almost losing his voice. “You are…”

Sensing Su Zimo’s abnormality, Tang Ziyi was a little nervous as well. Retreating, she widened the distance between them and glared at Su Zimo, asking, “What are you doing?”

Su Zimo realized that he had lost his composure and took a deep breath to compose himself.

He could not be blamed.

What he heard earlier on had truly shocked him immensely.

He had not expected to encounter someone from Tianhuang Mainland here.

More than that, he had not expected that the person he encountered in Tianhuang Mainland would be the legendary Thunder Emperor who had ascended to the upper world in the same era as the Eternal Human Emperor!

Suddenly, Su Zimo thought of a possibility. He looked at Tang Ziyi and asked, “Is the person trapped in the Ten Absolute Formation good at using thunder techniques?”

“That’s right,”

Tang Ziyi said.

At that moment, many things gradually became clear before Su Zimo’s eyes.

The prisoner Tang Ziyi mentioned earlier on, that Supreme Perfected Immortal, was the Thunder Emperor of Tianhuang Mainland!

The reason why Absolute Thunder City severed all power of thunder was also to suppress the Thunder Emperor.

With a stern expression, Su Zimo bowed deeply in the direction of the Ten Absolute Formation.

“What are you doing?”

Tang Ziyi was puzzled when she saw Su Zimo’s strange behavior and asked.

Su Zimo did not explain.

His bow was not only because he cultivated the Void Thunder Manual or because of the fact that the Thunder Emperor fought for the human race back in the ancient era in Tianhuang Mainland.

More than that, it was because of everything the Thunder Emperor did in the upper world—it was for his magnanimity and boldness!

“Well done on saying those words earlier on, as expect of someone from Tianhuang Mainland,”

The Thunder Emperor’s voice sounded in Su Zimo’s mind, “However, it’s better for you to not continue on this path.”

“This path is way too difficult. Throughout history, countless living beings of the lower worlds have tried but failed.”

“In fact, many people disappeared into the sands of time without a trace.”

Su Zimo was silent.

He understood that the Thunder Emperor’s persuasion was out of goodwill.

Nobody knew better than the Thunder Emperor how difficult this path was. That was the reason why he could say that.

The Thunder Emperor could tell that Su Zimo was a rare genius.

However, he had roamed the upper world for many years and had seen all sorts of geniuses.

He persuaded Su Zimo to turn back and not step onto this path because he did not want to see this person of Tianhuang Mainland strike a stone with an egg in a moment of passion and die prematurely on this path filled with corpses.

However, although Su Zimo had heard of the Thunder Emperor, the latter did not know him.

He did not understand Su Zimo nor did he know the latter’s personality.

More than that, he did not know that Su Zimo had once established the Martial Dao in the lower world and blessed all living beings. Known as the Eternal Martial Emperor, his accomplishments even surpassed the Human Emperor!

Su Zimo did not explain either.

The Thunder Emperor continued, “Apart from me, there was also Lin Zhan who ascended from Tianhuang Mainland back then. He ascended to the Green Firmament Immortal Domain and became an Immortal King before me. He was even highly regarded by Green Firmament Immortal Emperor and was conferred the title of Battle King.”

“I’ve been imprisoned here all these years and no longer have any news of him. However, I believe that with his methods and strength, he will definitely be able to establish an Immortal Kingdom in the Green Firmament Immortal Domain.”

“Although Brother Lin and I are not in the same Immortal Domain, we have the same ideals and beliefs. If you have the chance to head to the Green Firmament Immortal Domain after leaving this place, why don’t you look for him? He’ll definitely be extremely happy if he knows that you’re from Tianhuang Mainland.”

At that point, the Thunder Emperor paused for a moment. “Right, you might not know who Lin Zhan is, but you definitely know his title in Tianhuang Mainland.”

“He’s the Eternal Human Emperor.”

“Ah!”

Su Zimo was shocked.

This was the first time he knew the name of the Eternal Human Emperor.

This was also the first time he knew anything about the Eternal Human Emperor after ascending to the upper world.

Su Zimo murmured internally, “I wonder how Senior Human Emperor is doing.”

“What happened?”

The Thunder Emperor could tell what Su Zimo was implying and asked.

Su Zimo did not hide anything and recounted the battle at Enigma Palace and the return of the Human Emperor to Tianhuang Mainland.

At that time, although the Human Emperor returned to the upper world, he was clearly severely injured.

“Breaking through the barrier of the world and forcefully descending is way too dangerous!”

The Thunder Emperor said, “At best, his Dao will be destroyed. At worst, he might even die! Unfortunately, I’m trapped here and can’t help much.”