This book is a fanfiction of Winx club and Harry Potter. *** The Winx Club are supposed to go to earth and stay in the Hogwarts school of Witchcraft and Wizardry for the third year. They should find Sirius Black and stop Valtor. That too secretly. Can they do it? *** Note: I DO NOT OWN THE CHARACTERS. They are owned by Iginio Straffi and JK Rowling. This is my first fanfiction. So please say on what I can improve. *** And thankyou @Aditi_Shrivastava for the cover #Honorable mention in Clover's awards