"At that moment Neville toppled into the common room. How he had managed to climb through the portrait hole was anyone's guess, because his legs had been stuck together with what they recognized at once as the Leg-Locker Curse. He must have had to bunny hop all the way up to Gryffindor tower."
—Description of the curse[src]

The Leg-Locker Curse[3] (Locomotor Mortis)[4], also known as the Leg Locking Spell[5] is a curse[1] that binds the legs of the victim together.[3] It is most often used by experienced witches and wizards in duels, or in friendly wizard races.[5] This curse is one of the spells found in the book Curses and Counter-Curses by Vindictus Viridian. There exists a counter-curse of unknown incantation; Hermione Granger used it to reverse the curse Draco Malfoy used on Neville Longbottom[6].

Known uses


Ron Weasley: "You have got to start standing up to people, Neville."
Neville Longbottom: "How? I can barely stand, at all!"
— Usage by Draco Malfoy[src]
Caster(s) Victim(s) Date Notes
Draco Malfoy Neville Longbottom 1991 Used it to bully him.[6]


Caster(s) Victim(s) Date Notes
Harry Potter Draco Malfoy Early May, 1997 Used it nonverbally, but unsuccessful, because he missed and spell backfired of the wall behind Malfoy's ear and smashing the cistern, during their duel in the Boys bathroom.[7]
Harry Leg-Locker Curse

Known practitioners


English locomotor, meaning "of or relating to locomotion"[8] and Latin mortis, meaning "death."[9] Overall, the incantation roughly means "killing locomotion" or in other words, stopping someone from moving normally.

See also

Behind the scenes


Notes and references

  1. 1.0 1.1 As the name of the spell is "Leg-Locker Curse", the title makes it rather evident that this spell is a curse and not a jinx, hex or charm.
  2. Harry Potter and the Chamber of Secrets (video game) (PS2 Version) (Chapter 14 - Cornelius Fudge) (Page 192, Paragraphs 4;5)
  3. 3.0 3.1 3.2 Harry Potter and the Philosopher's Stone, Chapter 13 (Nicolas Flamel) (Page 159, Paragraph 15, Line 4 UK Edition)
  4. Harry Potter and the Philosopher's Stone, Chapter 13 (Nicolas Flamel) (Page 162, Paragraph 8, Line 1 UK Edition)
  5. 5.0 5.1 The Cast-a-Spell handbook, as can be viewed here.
  6. 6.0 6.1 Harry Potter and the Philosopher's Stone, Chapter 13 (Nicolas Flamel) (Page 160, Paragraph 3, Line 1 UK Edition)
  7. Harry Potter and the Half-Blood Prince, Chapter 24 (Sectumsempra)
  8. See this entry on Google
  9. See this entry on Google Translate.
  10. Harry Potter and the Philosopher's Stone, Chapter 13 (Nicolas Flamel) (Page 162, Paragraph 7, Lines 4;5 UK Edition)

Curses and Counter-Curses
Spells included in the book: Full Body-Bind Curse · Leg-Locker Curse · Jelly-Legs Curse · Pimple Jinx · Stickfast Hex · Tickling Hex · Tongue-Tying Curse · Hair Loss Curse