Only when seeing the Plague Doctor, did a slight breath of life appear in those deathly silent eyes.

The headquarters of the Plague Doctor was an underground building, with the ruins of a military camp above it, and the lower part completely hollowed out. A steel giant gate opened, and the magic waves and some special fluctuations flowed within.

Not far inside was another metal giant gate, its surface was still filled with all kinds of extraordinary auras.

After passing through more than a dozen metal gates, they finally entered a spacious place, which seemed to be an underground city, with many buildings inside.

The special substances in the air almost disappeared after entering the underground city, as if there were filters on those giant gates that could filter the pollution in the air.

As they went deeper, ordinary people also appeared here. Their condition was relatively good, and the smiles that hadn't been seen since entering this Nightmare World could also be seen in this underground base.

Mr. Baiyi looked at these people and asked, "How many people are there in Fenghuo City now?"

Ha Sea spoke heavily, "A little more than 800,000, they are all scattered in other underground bases. The base I brought you to now has only about 30,000."

Mr. Baiyi recalled Fang Heng's words that the average lifespan of an Alchemist is ten years and fell silent. This city was entirely a City of Death, each underground base was more like a chance, once the Black Death Curse appeared in a base, it was basically hopeless.

But there are other bases that maintain the life of this city.

Now looking at the smiles of those civilians, Mr. Baiyi always felt a sense of reluctance, are there really still smiles in this kingdom?

As the group discreetly advanced, they finally stopped in front of a building at the center.

"Lord Zai, the person has been brought back."

Ha Sea pressed a button, speaking with some respect in his tone.

Buzz—

The steel roar sounded, and the giant metal gate in front opened, inside were a dozen Plague Doctors wearing bird beak masks, dressed in white coats or Death God Robes.

Mr. Baiyi noticed that there seems to be no difference in status between the Plague Doctors dressed in white coats and those in Death God Robes, except that the ones in Death God Robes gave a more ferocious impression.

Leading them was a Plague Doctor wearing a Death God Robe, and the aura around the Plague Doctor was extremely powerful, although the Plague Doctors' system was somewhat different from others.

But Mr. Baiyi could still determine that this Plague Doctor was a powerful Golden Upper Tier existence.

Legendary figures were not scarce in ancient times, but they weren't as common as cabbages. Only the Legendary figures under the Ancient Gods were many, high-end forces elsewhere were still mainly Golden.

Golden Upper Tier was not considered weak in any era.

This is also why the Giant Dragon race was called the Mythical Race because for normal Giant Dragons, breaking through Golden wasn't difficult, with even one out of every hundred becoming Legendary.

This person named Zai was also examining Mr. Baiyi, seemingly somewhat apprehensive about him. After about ten seconds of silence, he politely said: "Mr. Baiyi, please come in."

"Mr. Zai, I have some questions I'd like to ask." Mr. Baiyi toyed with the mask in his hand and followed them into this relatively technologically advanced building.

The building was large, with many small rooms from which occasional howls of anguish could be heard. Various Plague Doctors were shuttling through these rooms, seemingly performing surgeries or conducting research, looking somewhat creepy.

The Plague Doctors who had just returned with Mr. Baiyi all dispersed upon entering the building, heading into those small rooms to get busy.

"What do you wish to know?"

Zai didn't stop walking, as if he were in a hurry.

They needed to find a way to treat the plague, or the infected would die, and they also needed to continue researching those dangerous substances.

The Plague Doctors firmly believed that the key to solving the Black Death Curse lay in those dangerous substances, and ultimately they indeed took away the curse and all the dangerous substances.

"Can you contact other bases?" Mr. Baiyi followed Zai into a seemingly ordinary room, the other Plague Doctors stood guard outside, not entering.

Inside, there was an operating table, and a mutant Beastman full of a dangerous aura was bound on it, making meaningless roars, looking somewhat weak.

"Yes, the Magic communication device has not yet been invaded by the Black Death Curse." Zai quickly walked to the corner and took out a black box, covered with a mesmerizing engraving, looking somewhat cool.

Zai picked up the cage and fastened it over the mutant Beastman's head. Instantly, the cage reshaped rapidly, extending into a black curtain that completely enveloped the Beastman.

And the Beastman also stopped struggling at this moment, like a black corpse, motionless.

It was then that Zai turned around, the pale yellow light on the bird beak mask looking at Mr. Baiyi: "I can help you find your companions, but I have a request."

"Speak."

"Provide me with your modification data, we really need such data." Zai's tone was very sincere, like a request, but also carried a hint of firmness.

To the Plague Doctors, Mr. Baiyi's appearance was like a ray of hopeful light, able to handle dangerous substances barehanded, which was incredibly astonishing to the Plague Doctors. Normally, without wearing protective gear, touching dangerous substances would likely result in direct erosion by them.

Yet Mr. Baiyi didn't need that protection. From confirming that he wasn't a dangerous substance, Mr. Baiyi's modification technology became immensely valuable to the Plague Doctors.

Mr. Baiyi paused, somewhat silent. The reason 'Evil Thought' could suppress dangerous substances was just because those were Nightmare World's dangerous substances, not the outer world's.

The role of Evil Thought was infinitely magnified within the Nightmare World.

His hesitation, in Zai's eyes, seemed like reluctance, he solemnly said: "You can make requests too, as long as you give us your modification technology, I'll try my best to meet your demands."

Mr. Baiyi's eyes shifted slightly: "Really?"

"Of course, you can make your demands." Zai was unhurried, unafraid of Mr. Baiyi making excessive demands because Mr. Baiyi, since entering Fenghuo Kingdom, had no choice but to cooperate with them.

Black Death Curse really wasn't something ordinary people could resist, he didn't believe Mr. Baiyi would oppose them over some interests.

Mr. Baiyi thought for a moment: "First, help me find my companions, a Mechanical Bone Dragon, and an old man of Golden Upper Tier, who looks like this."

Mr. Baiyi raised his hand, the intense malice flowing in his palm, gradually sketching the appearance of the Old City Lord and the Bone Dragon.

Zai casually took an instrument, capturing the image in Mr. Baiyi's hand, and after about three seconds, he put down the instrument: "It's been notified, as long as they're still in Fenghuo City, there will be news before nightfall."

"What if they're in other cities?" Mr. Baiyi asked.

"Now Fenghuo Kingdom has only us and two surrounding cities left, I will contact the Disaster Object Containment Institution, and cooperate with the Knight Order of Light to search. If there's no news before nightfall, it means your two friends are in those Cities of Death, and there's nothing more I can do." Zai spoke calmly.

There was a slight pause at the mention of the City of Death, but it quickly passed, and he looked at Mr. Baiyi: "Any other requests?"

"I need to know the strength of the Plague Doctor Organization...."

Mr. Baiyi hesitated a bit, it seemed somewhat inappropriate to pry into others' privacy, yet Zai answered much faster than he expected, calmly stating: "Seven Golden Upper Tier, thirty-five Middle Tier, one hundred and twelve Lower Tier, 920 Silver Upper Tier, 2154 Middle Tier, 4832 Lower Tier, I don't remember Bronze, there are too many."

Mr. Baiyi was shocked, over a hundred Goldens?

But then he recalled the timeline of this era and was relieved, with the magic concentration being a hundred times higher than the Federation Era, and all who survived until now being strong, having such a number was understandable.

He then decisively took out a small booklet, a manufacturing book about Evil Thought.

"Help me find some people and kill them, then this is yours...."

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