431: Is the dark side of the world right beneath my feet?

"What is it?" Chen Heng asked with interest.

According to number eight, that thing didn't seem stable, but Chen Heng liked unstable things.

"The first generation evolution solution."

As number eight spoke, he led Chen Heng towards a corner of the Testing Ground.

"This project was originally intended by the Creator for himself, but the risks and uncertainties were too high, so the Creator abandoned it after only researching the first generation."

"I also can't analyze the first generation evolution solution, so I think it's quite suitable for you."

"But before that, I need to warn you that the first generation evolution solution has an extremely high-risk factor, with the risk of genetic collapse."

"Of the more than ten thousand previous experiments, only half a case succeeded."

"What do you mean by half a case succeeded?" Chen Heng asked.

"A Yao Race member with Heavenly God genes successfully evolved after taking the first generation evolution solution, and his strength and physical toughness increased sixfold."

"However, he only survived for sixteen hours before dying due to genetic collapse, which is why it's called half a case."

Chen Heng frowned, it seemed this thing was indeed very dangerous.

But danger and opportunity coexist; his strength and physical toughness increased sixfold, and the ultimate increase in power after resurrection wouldn't be just this little bit.

"Don't worry, I know what I'm doing."

Besides, if it really doesn't work, I'll just use Optimization, what's the big deal?

"I understand." number eight gently covered a piece of metal with his arm, and the metal immediately lit up with a pale blue light.

The previously refrigerated and sealed container opened, and two test tubes containing completely transparent liquid rose up.

"Is this the first generation evolution solution you mentioned?"

Chen Heng picked up the test tube; the cool touch felt quite comfortable.

"Yes, please use it with caution." number eight nodded and took two steps back.

Looking at the optimization button above the first generation evolution solution, Chen Heng smiled slightly.

"Alright, put it away, I'll use it when I get back."

He was already starting to anticipate how exciting it would be after drinking this thing.

"Wait a moment." Seeing Chen Heng about to leave, number eight immediately took out two injection guns from the recess where the test tubes had just been placed.

"The first generation evolution solution is not taken orally, but injected."

"If taken orally, it will have no effect, but it tastes good."

"Let's go, one last look at the Yin-Side Passage." Chen Heng nodded, he really hadn't paid attention to this... Compared to other relatively straightforward passages, the Yin-Side Passage was quite complex.

Chen Heng had opened at least seventy sealed doors, and he was just one step away from completely losing his patience.

"Do you really want to open the Yin-Side Passage?"

number eight stood beside Chen Heng with an expressionless face, watching his hand about to press the button and asked.

"Why not? Since I'm here, I should at least take a look."

Chen Heng didn't feel there was any problem; he even told Bai Jun and Luo Shuo to get ready at the other two switches.

"I understand." number eight didn't say anything more and silently retreated to the side.

This gate, which separated the Yin Side and the Yang Aspect, was quite thick, and its opening method was also relatively complex.

In addition to requiring a pass for authentication, it also needed three people to press the switches simultaneously to unlock it.

"Ready?"

Chen Heng turned to look at Bai Jun and Luo Shuo.

"Ready!" Both Bai Jun and Luo Shuo were a little nervous; it was their first time doing something like this.

It wasn't that they hadn't disarmed other mechanisms, but those mechanisms usually hid peerless Cultivation Techniques or treasures.

This was the first time they had seen one that hid a whole world behind it.

Especially after experiencing the yin wind in the Chengtian Empire, both of them had a considerable fear of the Yin Side.

"Open!"

Following Chen Heng's command, the three of them simultaneously pressed the switches in their hands.

Hiss!

As the heavy airtight door opened, the black yin wind rushed in through the gap.

"Please stay away from that energy gas; Yang Aspect creatures will have their bodies rapidly decomposed upon contact."

number eight blocked the others behind him, his body quickly transforming into a transparent wall, isolating the yin wind on the other side.

"Please immediately..."

Just as number eight was about to tell Chen Heng to quickly hide behind him, he heard a gasp.

And then?

There was no "then."

Chen Heng was seen opening his mouth wide, frantically devouring the surging yin wind, with an exceptionally intoxicated expression on his face.

Because he saw that the progress of his next Power of the Ancestral Witch was slowly increasing.

This was just the leaked yin wind; if he went to the Yin Side and took a deep breath, how much would it increase?

"It's fine, they can't get through."

The Mouth of Taotie was responsible for devouring the yin wind, completely not affecting Chen Heng's ability to speak.

After observing cautiously for a while, number eight transformed back into his human form.

"Are you not feeling unwell?" number eight looked at Chen Heng with a strange gaze.

"Not at all, just a bit of heartburn." Chen Heng rubbed his stomach; his digestive tract was being decomposed by the yin wind, so he naturally felt some heartburn.

Unfortunately, the speed of the yin wind's decomposition was not as fast as Chen Heng's recovery, so apart from the heartburn, he didn't feel anything else.

"How truly miraculous, to have a Yang Aspect creature capable of devouring Yin Side energy..."

number eight said with an astonished tone, but his face remained expressionless.

After a while, when no more yin wind surged through the crack in the door, Chen Heng pushed open the incredibly heavy gate.

"This... is the Yin Side?" Chen Heng turned to look at number eight, asking with a face full of confusion.

Behind the gate was not another world as Chen Heng imagined, but a void where there was nothing.

"No, this door actually leads to the true Yin-Side Passage."

number eight shook his head, answering the confusion of Chen Heng and the others.

"Pass through this passage, and you will reach the Yin Side of the world, which is the world beneath the rock layers."

"?" Chen Heng and the others stared blankly at number eight.

"Isn't the Yin Side world another world?"

"No, the Yin Side world is a truly existing material world."

"It's just that under the influence of the root, spatial superposition makes the space of the Yin Side world larger, allowing life to exist."

"If one does not enter through the Yin-Side Passage, one needs to possess the ability to break through spatial barriers to enter."

"Wait a minute, then why did Yin Side creatures run to the Yang Aspect when the Chengtian Empire merely dug through the world-suppressing nail?"

Chen Heng interrupted number eight's explanation; he was getting more and more confused.

"Are you referring to the black storm, the Black Witch God, and the barbarians of the Yin Side?"

"The Black Witch God himself doesn't have the ability to break through spatial barriers, but the black storm does."

"They should all have been carried to the Yang Aspect world by the black storm."