User blog comment:RoyallyBella/Official Season 6 discussion blog/@comment-4131393-20131103150759/@comment-4588346-20131103170445

As the fairies of Alfea celebrate Faragonda's 100th anniversary, the Trix take over Cloudtower, teaming up with Selina, a new witch with a very powerful book. Her first target: Pixie Village The Winx go to Lynphea College for special training with the Specialists and Paladins, skilled warriors. When Selina sends the Treants to attack, the Winx are stripped of their powers and forced to return to Alfea. This is the summary from nick.com so it is completely official.