He has been reincarnated through countless worlds, adorned with billions of mythological terms!

During these five years, there was another event that forced Yun Yi to admit that humanity truly has immense potential.

When the war ended, the number of living people in the Allah world had plummeted to less than three billion.

War ravaged the entire continent—the True Bishop's million-strong army was annihilated, the Holy City was reduced to ruins, and the various dioceses suffered heavy casualties in the conquest war led by Mu Baiwei.

This is just the war itself.

The ensuing Black Tide, the looting by wasteland bandits, and the persistent famine and plague in the early post-war period pushed the population to an extremely dangerous edge.

Too few living people means too few new souls.

Too few new souls means that the army of Yin ghosts will have problems replenishing its manpower.

Yun Yi knew very well that the existing Yin ghosts were not enough.

What he wanted was a truly inexhaustible army of the underworld, and the prerequisite for "inexhaustible" was a sufficiently large number of living people.

So he introduced the law later known as the "Youdu Fertility Subsidy," the core rule of which was so simple it consisted of only one sentence:

For each child born, you will be rewarded with 100,000 Ghost Coins.

What is the concept of 100,000 Ghost Coins?

In the economic system of Youdu, one Ghost Coin can buy three white steamed buns, and ten thousand Ghost Coins can purchase a standard house in Youdu City.

One hundred thousand Ghost Coins is enough for an average family to buy a three-bedroom house in Youdu City, plus three years' worth of living expenses.

This level of subsidy would be outrageous in any other world.

More importantly, Ghost Coins are not worthless.

It is a universal currency forged from Yin Qi crystals personally refined by Yun Yi, with each coin containing a wisp of extremely pure Yin Qi energy.

Living people can use it to cultivate the "Divine Demon Body Refining Technique," and ghosts can use it to enhance their own cultivation—it has irreplaceable practical value.

Therefore, Ghost Coins do not depreciate.

Over the past five years, the purchasing power of Ghost Coins has not only not declined, but has instead increased by 30%.

People have a very strong desire to save, but an even stronger desire to consume—because after consuming, they can easily have another child and get another 100,000.

In demographics, the level of subsidies has always been positively correlated with the birth rate.

However, when the level of subsidies exceeds a certain threshold, the slope of this curve will suddenly become steeper, almost vertically.

The 100,000 Ghost Coins were precisely placed at that turning point.

In the first year after the war, the population rebounded from less than three billion to three and a half billion.

The growth rate is moderate because most people are still observing and don't really believe that such a big pie could fall from the sky.

The year after the war, the first families to receive subsidies moved into their new homes.

The neighbors were envious.

The birth rate began to soar, and the population exceeded 4.5 billion by the end of the year.

Three years after the war, when the officials of Youdu wrote down that number in their year-end summary report, everyone thought they were seeing things—7.8 billion.

It is said that Yun Yi himself remained silent for a long time after seeing this number.

Four years after the war, the population exceeded nine billion.

Five years after the war, which is now, the number of living people has officially surpassed the 10 billion mark.

Hundreds of billions of living people, two billion ghosts, one hundred million vengeful spirits, and a million phantom spirits.

The entire world is clearly divided into the Yin and Yang realms, and Yun Yi stands at the very center of this massive engine, simultaneously receiving the power of faith from billions of living people and the Yin energy from two billion Yin ghosts.

Even he himself couldn't explain just how terrifying his current strength had become.

Now that we've developed to this point, it's time to officially put the plan to conquer the world on the agenda.

He needs more of the world.

More worlds mean more energy, which means more manpower.

Yun Yi withdrew his gaze from the distance and spoke calmly:

"Mu Baiwei".

From the swirling, dark mist behind her, a little girl in a black dress silently emerged.

Five years have left no trace on her.

She still looks like she's in her early teens, because as long as you don't deliberately change her appearance, a ghost will always retain the shape it had before it died.

"I'm here."

Mu Baiwei walked to his side with her hands behind her back, her skirt swaying gently in the mist. "So, you're finally deciding to set off?"

"Yes." Yun Yi nodded, without any further preamble. "Five years have passed. With our current strength, it's time to conquer other worlds."

"So, the portal to your original world has been opened?"

Mu Baiwei shook her head.

"Can't open it."

"That flesh-crazed evil god was probably scared by you five years ago, so he simply sealed off the entire world from the outside, making it impossible to penetrate."

"Over the years I've made many attempts, but I can only send one or two people in at most, and once they're in, they immediately attract the attention of that evil god."

Yun Yi was silent for a moment, then changed to a more practical question: "Then let's change it."

"Besides the world of flesh-destroying monsters, are there any other viable targets?"

"Yes. I've already prepared it for you."

Mu Baiwei did not answer directly, but turned around and waved towards the depths of the dark mist.

The fog churned a few times, and several shivering figures stumbled and rolled out of it.

They wore matching dark blue combat uniforms, with a dark blue club badge—a gear and eye design—tucked into their shoulders.

The gear represents technology, and the eye represents exploration. Together, they mean: to see through the truth of the world with the eyes of technology.

Dark Technology Society.

Five years ago, during that war, these arrogant fools tried to capture a Soul with a spatial anchor, only to be torn to shreds along with their equipment by that Soul.

After their deaths, they transformed into ghosts and were recruited on the battlefield, where they blended into the vast army of ghosts under Yun Yi, becoming indistinguishable from the crowd.

Yun Yi had never paid attention to them in the past five years.

He couldn't possibly identify each of the two billion Yin ghosts one by one.

Seeing these unfamiliar faces, Yun Yi looked at Mu Baiwei with a hint of doubt.

Mu Baiwei cut to the chase: "The Dark Technology Society, which is the original Black Tide organization in your world, is one of the few forces in this world with the ability to travel between worlds."

She kicked the knee of the middle-aged man kneeling at the front. "They've already confessed everything they needed to."

"This organization is quite something; they've left traces of their activities in several worlds."

"The world they belonged to before they entered this world was called the 'World of Original Sin'."

"A world of original sin?" Yun Yi's gaze fell on the middle-aged man.

The middle-aged man's forehead was almost touching the ground, his voice trembling: "Reporting to the Ghost Emperor... we were indeed once members of the World of Original Sin, but later, because we offended the Cult of Original Sin, we had no choice but to flee to this world."

"Lord Ghost Emperor, we did indeed originally possess a method to travel to the World of Original Sin—our organization possessed a spatial artifact capable of opening passages to other worlds."

"But now... given our current state, the organization must have already assumed we're all dead. I can no longer contact the organization, and therefore have no way of obtaining a way to enter the world of original sin..."

Yun Yi glanced down at the middle-aged man, then turned to look at Mu Baiwei, a hint of undisguised doubt in his silver-gray pupils.

"You brought them here just to tell me they can't do anything about it either?"

His tone was very flat.

But Mu Baiwei could tell that beneath that calm demeanor lay an unspoken message—"Then you are wasting my time."

"Of course not." Mu Baiwei walked over to the few members of the Dark Technology Society who were trembling like leaves, her black skirt swaying gently with her steps.

She extended a finger, the tip of which gleamed with a cold, silvery-gray light, and precisely placed it between the middle-aged man's eyebrows.

The middle-aged man shuddered violently, and a faint wisp of dark red mist, almost imperceptible to the naked eye, appeared between his brows.

The wisp of mist was originally so faint as to be negligible, but stimulated by Mu Baiwei's silver-gray light, it seemed to be a living thing awakened and suddenly began to surge violently.

It spread outwards from the middle-aged man's brow, quickly outlining twisted and eerie dark red lines along his grayish-white, ghostly skin.

"The aura of the original sin god."

Mu Baiwei withdrew her finger, and the wisp of dark red mist also shrank back into the middle-aged man's body. "Even the people from the Dark Technology Society don't know this."

"They have been in the world of original sin for too long, and their souls have long been marked by the evil god of original sin."

"This mark does not disappear with death—as long as they have memories, and as long as they have emotions such as greed, pride, and envy, the aura of original sin will always cling to them."

She turned around and looked at Yun Yi, a sly glint in her dark eyes: "And these auras are the coordinates of the world of original sin."

"Every wisp of energy is connected to the original sin god in some way. As long as I trace this connection in reverse, I can pinpoint the exact location of the original sin world."

"Then—use their aura as a key to open the door to that world."