Magick Moste Evile is a book written by Godelot that covers Dark magic. Godelot wrote down this collection of dangerous spells with the help of his wand (says Godelot in his notebook) which he claims is made of Elder (Deathly Hallows believers consider this to be the Elder Wand). This body of work greatly advanced the study of Dark Magic. Horcruxes, however, receive only a brief mention in the book, which does not detail what they really are.
A copy of the book is kept in the Restricted Section of the library of Hogwarts School of Witchcraft and Wizardry. Hermione Granger checked it out, only to be thoroughly annoyed by its lack of information.
- Harry Potter and the Half-Blood Prince (First appearance)
- The Tales of Beedle the Bard (Mentioned only)