"But if he was contaminated and then took his issued Aura Concealment Potion, we really wouldn't be able to detect a thing."
Lu Yuan listened quietly without interrupting.
"That's also why so few people are assigned to review the Pathway Mutation Potion," the Lantern Knight continued. "The reason is simple: very little of the potion is produced, and once someone's Pathway changes, it's easy to notice. It isn't that we don't take it seriously. There's simply not much we can do."
"And the techniques behind a potion that can contaminate someone else's Pathway are extremely difficult to uncover."
The Lantern Knight's gaze returned to Lu Yuan.
"I've explained everything you need to know. I didn't let you join in right away because I didn't want anything wasted," the Lantern Knight said. "Now your first test is in front of you. Just tell me what you think."
Lu Yuan quickly exchanged a few thoughts with Oden in his mind and made his decision.
"Then I'll give you my take," Lu Yuan said. "Most of these ingredients are used for purification. The Water-Separating Stone, in particular, is central to this approach."
"These alone aren't enough to work out exactly what Frey did, but I can make a guess at the general direction. She probably separated out all the water in the potion, then tried to identify it by other means and force an analysis of some of the materials used."
"But if I were doing it, I might go a step further," Lu Yuan continued. "Once the water has been separated out, why stop there? Set the other ingredients aside and look only for the core material that causes the contamination. If we find it, we might find a way to counter it."
"Of course, that kind of purification carries risks. First,