Piertotum Locomotor

Piertotum Locomotor is a Transfiguration spell used to animate previously inanimate to do the caster's bidding.

Known uses

 * Professor Minerva McGonagall used this spell to animate the suits of armour and statues within Hogwarts School of Witchcraft and Wizardry and ordered them to defend the castle against the oncoming Death Eaters during the Battle of Hogwarts in 1998.
 * It was also used nonverbally by Professor Flitwick to animate a suit of armour during his attempt to expel Severus Snape from Hogwarts. After Snape used the suit to shield himself from Professor McGonagall's daggers, Professor Flitwick tried to capture him within the grip of the animated suit of armour.

Possible uses

 * It is also possible that the Chess Pieces that protected the Philosopher's Stone were also Transfigured to be animated and protect the Stone.
 * It may be this spell that was used by Albus Dumbledore to enchant the Fountain of Magical Brethren in the Atrium of the Ministry of Magic in 1996 during his duel against Lord Voldemort.

Etymology
Pier means "friend" or "colleague", totum refers to "the whole" or "total", and locomotor means "the movement of". Another possible etymology for Piertotum is a combination of the Latin words piē "dutifully" and tōtum "all, the whole thing".

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 Order of the Phoenix
 * Harry Potter and the Deathly Hallows
 * Harry Potter and the Deathly Hallows: Part 2