The new Defence Against the Dark Arts professor is Alastor "Mad-Eye" Moody, a former Auror and Dumbledore's friend. In class, he illegally talks about and demonstrates the three Unforgivable Curses: the Imperius Curse, which forces the victim to do the caster's bidding; the Cruciatus Curse, a spell that tortures its victim; and the Killing Curse, Avada Kedavra. Harry learns he is the only known person to have survived the Killing Curse, cast against him by Voldemort when he was a baby.
In the first of the three tasks of the Triwizard Tournament, the champions are to collect a golden egg guarded by a dragon. Harry completes the task with hints from Rubeus Hagrid and Moody. Following the first task, Ron and Harry mend their broken friendship. The second task requires retrieving something important that was taken from each champion and hidden in the Hogwarts lake. Ten minutes before the task, Harry is given gillyweed by Dobby so he can breathe underwater. Harry finds the four "important objects" of the tournament's contestants: Ron, Hermione, Cho Chang, and Fleur’s little sister, Gabrielle Delacour. He is forced to rescue Gabrielle along with Ron when Fleur does not come, so he loses the challenge but gains points for 'moral fibre.'
