Gobstone

A Gobstone is a round ball used whilst playing the popular wizarding game Gobstones. Some kinds expel a putrid fluid at the player who loses.

Appearances

 * Harry Potter and the Prisoner of Azkaban
 * Harry Potter and the Goblet of Fire
 * Harry Potter and the Order of the Phoenix
 * Harry Potter and the Order of the Phoenix (video game)
 * Harry Potter and the Half-Blood Prince (video game)
 * Pottermore