I can see experience bars after being transported to another world.

So, Auden and Lu Yuan stopped arguing, and Lu Yuan opened the booklet on his lap.

There are two types of booklets: individual booklets and a general booklet for everyone to use.

The book in his hand was a general register, with names listed. There were many names, and from a preliminary look, there were probably more than a dozen people involved in this drug deduction.

"That's all?" Lu Yuan was somewhat surprised.

Those who come to the Knight Academy from all over the world are all the chosen ones. Each class of students surpasses the previous classes, and there must be at least several dozen of them. However, the number of students who pass the intermediate pharmacy certification is much smaller than expected.

However, Lu Yuan didn't dwell on these things anymore. What was important right now was to quickly see what their thought process was like and whether he could offer any help.

The latest comments are at the very beginning of the main book.

"The aura concealment potion, after the initial hatching, seems to conceal its aura at the physical level. The potion used carries a distinct scent of rotten grass, so the concealment method has changed from the initial conjecture of the concealment potion formula to physical concealment. There may be some extremely rare material among the medicinal materials used."

"Investigations into heretics who take this medicine can be completely blocked from detection by the Holy Light Stone and the contamination detection inscription after taking it."

Lu Yuan raised an eyebrow. Completely blocking the detection of Holy Light Stones and Contaminated Inscriptions meant that the Northern Territory's method of screening for contamination was completely ineffective against this potion. And if the records of the Knight Academy's method of checking for heretics were true, it would also be useless.

Below are other people's comments.

"This is impossible, this is absolutely impossible." The handwriting below changed, the strokes were heavy, and there was a sense of astonishment.

Then another person's notes appeared, in which he recorded...

"Based on the initial investigation by the pharmacy teaching assistant and the string knight, it can be confirmed that our methods for detecting contamination and strange phenomena have not failed. Therefore, it can be inferred that the method of hiding the scent of this scent-concealing potion is by no means a simple scent concealment."

"After repeated attempts, the preliminary assessment of the structure of the medicinal materials used is as follows."

Looking further down, there was a list of seven or eight kinds of medicinal herbs, including the ones Lu Yuan had just seen: the Misty Flower, the Breath-holding Fern, and the Rotten Spot Grass.

"Tsk," Oden clicked his tongue, "Apart from that herb you can't understand either, they've completely deduced the composition of the entire potion."

Hearing this, Lu Yuan was somewhat impressed. In just one week, this group of people realized that the bottle of medicine was not simply a concealment of aura, but a kind of physical isolation. How could an ordinary person possibly connect the effect of taking the medicine with a physical isolation?

However, they did indeed succeed, and they are truly highly skilled to have passed the intermediate certification.

"But it didn't work," Oden said, his voice tinged with helplessness and regret.

"Even if they manage to deduce the medicinal herb, it won't be of much use. If that unknown herb cannot be detected, no matter how much they try to deduce it, it will be useless. Furthermore, it conceals its aura on a physical level, so ordinary detection methods will simply be ineffective."

Upon hearing this, Lu Yuan couldn't think of a good solution for a moment, because what Oden said was true. Since this medicinal herb could physically isolate the aura, it meant that the current reconnaissance methods had to be modified to some extent.

However, the North is so vast that it is impossible to cover it all, and it would take a long time.

Sigh, Lu Yuan continued to flip through the booklet with a headache, because the solutions given by those people were at the end.

"Since the principle and ingredients of the drug cannot be fully reconstructed, a preliminary solution is proposed: to conduct specialized testing with the putrefactive liquid as the core. We do not need to test other people's scent; we only need to test whether there are traces and residues of the putrefactive liquid on other people's bodies to confirm the suspicion of heresy on that person."

Opposition was quickly raised below.

"If heretics discover a large-scale spread of useless medicine made with putrefactive fluid as its core, this detection method will become invalid."

Then someone else came up with a new solution.

"This method can be concealed within the holy water detection process, using holy water as the overt detection method while actually detecting the smell of putrid liquid, which can delay the exposure of this detection method to some extent."

Immediately, someone raised a new objection.

"Corruption fluid and holy water are incompatible; how can they be mixed?"

Lu Yuan scrolled down, finding it increasingly interesting. From these conversations, it was clear that they had come up with a concrete and feasible solution during their discussion.

Using high-grade holy water as bait, the overt detection method is combined with a material composed of truly decaying plants and animal tissues. This material has a good detection effect on putrefactive liquids and does not repel holy water.

Using holy water as an excuse, anyone carrying the scent of putrid liquid will have their holy water change color upon contact with this method. By simply comparing the colors, the problem can be quickly resolved, and this method also has excellent concealment.

"These people are geniuses," Oden exclaimed upon seeing this. "However, this plan is not perfect. The putrefactive liquid is essentially a product of decay and corpses. Once it comes into contact with a corpse, it can easily lead to misjudgment. But there is really no better method at the moment. So this method is extremely inconvenient for patrol personnel in such a vast area as the North, but it is indeed a very feasible way for the main city that takes in refugees."

Looking at the long list of color comparisons, Lu Yuan had a sudden inspiration. He suddenly had a way to deal with the plague potion.

Given the current conditions and investigation, Lu Yuan indeed has no way of deducing the formula for the plague potion, but he is able to create a potion that can detect who has been infected with the plague.

As long as this thing has an incubation period, there is enough time for it to develop, so the threat it poses is very limited.

Of course, all of this is due to the fact that the number of people infected by the plague is not particularly large. At the same time, Lu Yuan does not believe that these heretics can produce thousands or tens of thousands of bottles of this medicine. Therefore, the plague must be spreading slowly and gradually. As long as a medicine that can detect who is infected can be made, the spread of the plague can be contained very quickly.

Of course, if the heretics could actually produce thousands or tens of thousands of bottles, that would be a different story, and there's nothing that can be done about it.

Lu Yuan shared his thoughts with Auden.

"A very good idea." Oden's eyes lit up. "The method you came up with is indeed very good, and it completely bypasses the difficulties of forcibly deciphering the unknown materials of the plague potion. All we need to know is who has been infected by the plague. We can deal with the rest later."

"However, in that case, the formula I gave you before will have to be modified. That formula was for counteracting the plague effects of the plague-fighting herbs, not for testing, so there are quite a few changes needed. I'll have to think about it myself."

"No rush," Lu Yuan added.

The group had already thoroughly investigated the matter of the aura-concealing potion, so Lu Yuan didn't plan to spend any more time on it, nor did he intend to try and get a knight's token. As a newcomer, there was no need for him to get involved. If it were really based on contribution, even if Lu Yuan compiled and reported everyone else's work, he wouldn't get many knight's tokens.