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Homonculous Charm

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"But the truly remarkable thing were the tiny ink dots moving around it, each labeled with a name in minuscule writing. Astounded, Harry bent over it. A labelled dot in the top left corner showed that Professor Dumbledore was pacing his study; the caretaker’s cat, Mrs. Norris, was prowling the second floor; and Peeves the Poltergeist was currently bouncing around the trophy room."

The Homonculous Charm (incantation unknown) was a charm that, when cast onto a map, would enable its possessor to track the movements of every person in the mapped area, through labelled dots that moved around the parchment.[1]


The charm has a powerful effect in that it is not fooled by various methods of concealment and disguise, such as invisibility cloaks (including the fabled Cloak of Invisibility)[2], the Polyjuice Potion[3] and the Animagus transformation.[2]


After charting the grounds and halls of Hogwarts Castle in the 1970s, on a piece of parchment that would go by the name of Marauder's Map, James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew cast this spell on it[1], along with a charm to insult Severus Snape.


"Homonculous" is a variant spelling of "Homunculus," which is a term used to refer to any representation of a human being.[4]


Notes and references

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