After descending the ladder into the well, Su Bai finally saw a hidden opening in the middle of the well wall.

After crawling inside.

Inside was a dark space, about several tens of square meters in size.

A kerosene lamp was lit in the center of the room, its faint light barely enough to illuminate everything.

A simple bed, several tables covered with bottles and jars, and a strange medicinal smell filled the air, like spoiled disinfectant.

"I can pack a few things and leave with you."

Yusevka said.

She walked up to the pile of bottles and jars and started filling them with something.

Su Bai glanced around and saw a thick stack of paper documents on the table next to him.

In the past, I would just pick up a few at random.

He asked, "Did you set up those deceptive devices at the entrance?"

"yes."

Yusef paused.

He continued, "I use it to filter out people who can help me. If you choose to help any one of them, you will get different answers."

What is the standard answer?

Su Bai asked curiously.

“Children symbolize the future and hope. Saving him means you are a rational person, and I will take the initiative to appear in front of you.”

"Women symbolize emotions. Saving her means you are a sentimental person, and sentimentality can lead to mistakes, especially here. I will carefully consider whether or not to meet with you."

“The old man symbolizes compassion, but compassion is worthless here. If you save him, I will completely give up the possibility of meeting you again.”

“I’ve seen a lot of idiots since the disaster broke out, and I don’t want to be dragged down by one of them.”

She explained calmly.

Su Bai asked, "Then how do you interpret my choice?"

"You... are a demon."

Yusefka whispered.

"But perhaps only demons can truly survive this long night..."

Su Bai chuckled and said nothing more.

He was very satisfied with the answer.

At first, he thought the 'doctor' would be a kind-hearted guy with an overflowing sense of saintliness. After all, someone who could be praised by that sharp-tongued old woman must be an absolute good person.

But as Youssefka himself said.

Good people don't live long here.

Perhaps she was a good person, but thankfully she has come to her senses in time. Such a calm person will at least not hold him back on the road.

"The ratio of sanity potions... Blood-clotting herbs mixed with corpse blood can effectively prevent the spread of bad blood... How to protect against poisonous snakes in the swamp..."

Su Bai suddenly gripped the documents in his hand.

He turned his head, looking at Yousefka with a strange gaze, and asked, "Did you develop all three of these medicines: the sanity potion, the hemostatic drug, and the antidote?"

"yes."

Yusefka responded.

She glanced at it, her tone somewhat downcast, "Unfortunately, the Church of Redemption didn't initially intend to adopt my treatment plan, otherwise the disaster might not have erupted so suddenly."

Su Bai's gaze towards her immediately changed.

The sanity potion, the hemostatic drug, and the equally common antidote are all just the most ordinary medicines, not even reaching the threshold of magic potions.

But these are the three most common drugs.

However, it can cure the two most terrible diseases in the city: the madness virus and the scurvy virus.

It is an indescribable miracle that Yusevka, with his mortal body, was able to develop these super drugs!

Just how terrifying is this guy's medical talent?!

"Do you want to leave here?"

Su Bai developed a fondness for talent.

It would be a tremendous waste for Yusufka, with his talent, to stay here and wait to die.

Survivors in the Lost City can leave the secret realm.

To go to the outside world.

However, it comes at a great cost.

But if it's for a top-tier medical institution.

Su Bai was willing to go through the trouble.

"Wasn't I just about to leave with you?"

Yusevka asked curiously.

Su Bai said, "I mean, leave this city, leave this long night."

"..."

Yusevka paused in his tidying up.

Without turning her head, she said, "Ask me again when you can actually do it."

"good."

Su Bai smiled and nodded.

After putting down the information about the medication, he pulled out a special record from the table.

"The source of the Frenzied Virus... the drawbacks of blood therapy... Byrenvis Research Institute..."

Byronvis Research Institute?

Su Bai was slightly taken aback. That was one of the three core areas of the Lost City, which was currently inaccessible.

Yusufka is investigating the origin of the madness virus.

How did this search end up here...?

As a player, all he knew was that the research institute contained a wealth of valuable knowledge items, such as books, potion recipes, even more precious blood potions, and invaluable symbiotes, among others.

But when he entered the research academy in his previous life, it had already been thoroughly explored by countless players.

Some items of research value have already been taken away or destroyed.

Until later.

He had never heard anyone mention the origin of this disaster.

Of course, few players pay attention to this kind of insignificant game background.

Yusevka stared at him, lost in thought, as he held the document.

I thought he was really interested.

He immediately said, "I am now almost certain that the source of the madness virus is the blood therapy that the Church of Redemption has been promoting in the city."

"The blood they used was problematic."

"And according to my investigation, the 'blood of redemption' used by the Church of Redemption was provided by the scholars of Byrenvis."

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