Undetectable Poisons were a type of poisons that were presumably undetectable by any method.[1]
History[]
Severus Snape assigned a "nasty" essay on them to his third-year Potions class in January of 1994 at Hogwarts School of Witchcraft and Wizardry.[1]
Appearances[]
- Harry Potter and the Prisoner of Azkaban (First mentioned)
Notes and references[]
- ↑ 1.0 1.1 1.2 1.3 Harry Potter and the Prisoner of Azkaban, Chapter 12 (The Patronus)