Season 2 Episode 30: Heartfelt Letter

"Wouldn't it be simple for an alchemist to recreate it?" Claude asked.

Edward let out a loud chuckle, causing Claude to raise his eyebrows, annoyed. "Mr. Rayforth, although it was easy for me to identify the additional element, it isn't so easy to recreate a complex medicine such as this. Identifying and making medicine are two very different processes. I had a hunch about the additional drug because I've already dealt with a few samples of Delihernum back when I was an assistant, and that too was by chance. Delhernum has a very peculiar odour, and although faint in this particular mixture, I was able to identify it. But recreating it would be impossible for most alchemists."

Claude leaned forward. "So, you're telling me that this drug cannot be recreated by just anybody."