We're Getting Mutants in the MCU - The Loop
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- Hermione: "This is Felix Felicis, I suppose? You haven't got another little bottle of — I don't know —"
- Ron: "Essence of Insanity?"
- Harry: "Trust me, I know what I'm doing... or at least Felix does."
- — Ron and Hermione becoming suspicious after Harry took Felix Felicis and said he was going to see Hagrid[src]
- "Take your seats. Today we will be brewing Essence of Insanity. I shouldn't have to tell you not to consume this potion... But the baffling behaviour of some of you makes me think you already have. Pay attention. We will begin with a lecture on Essence of Insanity."
- — Professor Snape to sixth-year Potions students[src]
- Harry Potter and the Half-Blood Prince (First mentioned)
- Harry Potter: Hogwarts Mystery (First appearance)
- Harry Potter: Magic Awakened (Mentioned only)