"Professor Umbridge opened her handbag, extracted her own wand, which was an unusually short one, and tapped the blackboard sharply with it; words appeared on the board at once"

The Blackboard Writing Spell (incantation unknown) was a charm used to cause words to appear on a blackboard.[1]



Murphy McNully was taught this spell by his mother when he was seven years old. During his time at Hogwarts, Murphy cast the spell to write instructions on how to perform the Thimblerig Shuffle.[2]


Severus Snape and Dolores Umbridge both used this spell multiple times throughout the 1995–1996 school year to write instructions on their blackboards.

Known Practitioners

Behind the scenes

  • In the Order of the Phoenix film, Umbridge brandished her wand from across the room to cause chalk-like writing to appear on the board as if an invisible chalk was writing on it. The sound of chalk writing could even be heard while the words appeared.
  • It is possible that this is the Locomotion Charm.
  • This spell seems to variate according to its caster's ability, as Severus only needed a single flick of his wand while Dolores tapped the blackboard sharply.[1]


Notes and references

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Harry Potter and the Order of the Phoenix, Chapter 12 (Professor Umbridge)
  2. 2.0 2.1 Harry Potter: Hogwarts Mystery, Quidditch, Season 1, Chapter 4
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