"W-What do you mean by that?" Adeline asked in disbelief as she looked at Leon.
"I mean what I said. You can take your revenge on her and get your brother back—without getting him killed," Leon replied with a smile.
"H-How?" Adeline asked with a serious expression, as she immediately grabbing Leon's shoulders tightly.
"Well... in order to tell you that, I'll need some information first. Like, what type of potion are they telling you to make for them?" Leon asked, his expression neutral.
"It's a transformation potion... T-They tell me to make it using some unknown herb they get every month from some trader.
It helps them maintain their ears and human-like aura. So that, no one can sense it and identify—"
"It's a fucking potion," Leon cut in, his eyes widening. "Artifacts and illusion magic can be revealed easily to mages and even swordsmen.
That's why they haven't been caught even in a five star noble household—because they're using potions to keep their appearance human-like.