Most of Harry Potter's spells come from his later years in Hogwarts ... In Harry's third year at Hogwarts, Dementors were stationed around the school grounds in response to the escape of supposed ...

Every good wizard must know this spell, especially when Dementors are about ... Consider your Harry Potter buzz officially killed. Have something to add to this story? Share it in the comments.

Harry Potter and the Prisoner of Azkaban, Chapter Nine, "Grim Defeat", p.188. Harry first learns his parents' last words in the Prisoner of Azkaban during his series of Dementor encounters.