The Four Champions

The Four Champions is the seventeenth chapter of Harry Potter and the Goblet of Fire.

Summary
Cedric is brought into a room with the other champions, Fleur Delacour and Viktor Krum. Bagman walks in and introduces an unexpected fourth champion, Harry Potter. The Headmasters meet, with two complaining about the fairness of Hogwarts having two champions to their schools' one champion. But Mad-Eye Moody points out that because of binding magic of the Goblet of Fire, the champions are magically obligated to compete. He also thinks someone used a powerful spell to make a fourth school the goblet and put Harry's name in to guarantee he'd be picked. With the matter settled, the champions are told when the first task is to take place, though not what the task is.

Leaving, Cedric asks Harry how he got his name in, but Harry still says he did not put his name in. Cedric doesn't entirely believe him. Cedric goes to the Hufflepuff Common Room to find a celebration waiting for him, from his house mates, and they celebrated all night.

Deviation from Canon

 * The entire chapter is told from Cedric Diggory's view, instead of Harry's view.
 * The readers get to see the Hufflepuff Common Room, which was never shown in the original core canon books, (even though JK Rowlings initially planned on Harry visiting all four Common Rooms).