Extreme Incantations

Extreme Incantations is a spellbook used by third year students at Hogwarts School of Witchcraft and Wizardry for homework during the summer holidays. The only known chapter is Chapter 32, which explains how to cast the Lumos Maxima charm. Harry Potter practiced this in 1993 under his bed-sheets at Privet Drive, while hiding from his uncle, Vernon Dursley.

Appearances

 * Harry Potter and the Prisoner of Azkaban (film)