Leg-Locker Curse

"At that moment Neville toppled into the common room... his legs had been stuck together with what they recognised at once as the Leg-Locker Curse. He must have had to bunny-hop all the way up to Gryffindor tower."

- Neville Longbottom having been cursed with this spell by Draco Malfoy in 1991

The Leg-Locker Curse, also known as the Leg-Locking Spell (Locomotor Mortis ) is a curse that is used to bind the legs of the victim together. This curse is one of the spells found in the book Curses and Counter-Curses by Vindictus Viridian.

Uses and practitioners
Draco Malfoy used this on Neville Longbottom while bulling him in 1991. In 1997 Harry Potter used this against Draco Malfoy but it missed and backfired of the wall behind Malfoy's ear, during their duel in a school bathroom.

Etymology
English locomotor, meaning "of or relating to locomotion" and Latin mortis, meaning "death"

Behind the scenes

 * According to Rubeus Hagrid, no first year should be able to use this curse, suggesting it is difficult, and that Draco Malfoy was able to use it at his first year was considered impressive.
 * Hermione Granger and Ronald Weasley learned this spell in their first year, to use on Severus Snape if he tried to harm Harry Potter at an upcoming Quidditch match. They did not need to use it, however - as Professor Dumbledore was watching, they found it unlikely Snape would try to hurt Harry
 * There is a counterspell of unknown incantation; Hermione Granger used it to reverse the curse Draco Malfoy used on Neville Longbottom.
 * In console versions of the Chamber of Secrets videogame, the Prefects use this spell if they catch Harry out of bed, taking away a number of points from Gryffindor House if any exist.
 * In the GBC video game adaptation of Harry Potter and the Philosopher's Stone, this spell is used to immobilize the opponent until they are defeated.
 * It can be bought at Wiseacre's Wizarding Equipment in Diagon Alley in LEGO Harry Potter: Years 1-4. Although, in LEGO Harry Potter: Years 1-4, this curse appears to bind the victim's legs with ropes, much like the effects of Incarcerous.

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Philosopher's Stone (film)
 * Harry Potter and the Philosopher's Stone (video game)
 * Harry Potter and the Chamber of Secrets (video game)
 * Harry Potter and the Goblet of Fire (video game)
 * Harry Potter and the Order of the Phoenix (video game)
 * Harry Potter and the Half-Blood Prince
 * LEGO Harry Potter: Years 1-4
 * LEGO Harry Potter: Years 5-7
 * Harry Potter Official Site

Notes and references
Maléfice du Bloque-jambes Liikkumitor kuolitus Maledizione delle Pastoie Локомотор Мортис