Also known as Secret Guardian in the 4Kids dub.
When Stella's ring of Solaria is stolen and taken to Cloud Tower, the Winx sneak into the school late at night to retrieve it.
Tropes:
- Unguided Lab Tour: The Winx sneak into Cloud Tower to retrieve Stella's rings from the Trix's bedroom. After finding it, they hear the Trix returning and rush to escape, getting themselves into the school's top-secret vault: the Crypt of the Magic Archive. When they enter, the camera pans to show several bookcases (which contain biographies of every notable fairy and witch to have ever existed), a statue holding an axe, and a planet globe. A curious Bloom picks up a book whose contents are unknown, therefore alerting Headmistress Griffin of intruders in the vault. The other girls follow suit until they all find a book about Bloom —it turns out to be a trap set up remotely by Griffin.
- You Are Grounded!: Griselda catches the Winx sneaking into Cloud Tower and they are temporarily stripped of their powers as punishment.
