A spell that shoots green sparks at the end of the wand.
Used in the video game version of Harry Potter and the Goblet of Fire, a spell that's learned when you defeat a Bowtruckle in the Forbidden Forest. Also used in the Chamber of Secrets and Philosopher's Stone(Game Boy Colour) video games. In the latter, it is used to attack enemies with green lightning.
Mentioned in Harry Potter and the Philosopher's Stone in the Forbidden Forest with no incantation.