|Defeated all possible opponents in blackboard duels|
While in Dumbledore's Office, go to the blackboard and select it. Go to the dueling section and defeat each person from each group.
|Rate this achievement||Average Rating|
|You need to register before being able to post comments.|
|You need to log in or register to use MyAchievements.|
|You need to log in or register to rate games.|
User Score is based on 7 user ratings.