Slippery Jinx

"Did someone cast a Slippery Jinx on your wand?"

- Jacob's sibling while tutoring Lumos in Charms class The Slippery Jinx (incantation unknown) is a jinx that presumably makes the target object slippery and difficult to hold.

Behind the scenes

 * The effects of this spell have not been truly demonstrated. This jinx was only mentioned by Jacob's sibling, most likely to comment on a fellow student's loose and clumsy wand grip.
 * It is possible that the Gripping Charm may act as a counter-spell to this jinx, as they produce opposite effects - the Gripping Charm makes an object easier to hold, whereas the Slippery Jinx makes it more difficult.

Appearances

 * Harry Potter: Hogwarts Mystery (mentioned only)