Ep 10. Hydra Awakens

Valtor decides to attack Hypsos, a star in the constellation of Hydra. When they discover that Hypsos is in danger, the Winx leave for a new mission, but Valtor uses his dark powers to turn the Hydra into a threatening monster. While the Winx face the Hydra, Musa saves Riven and the two seem to reunite. Unfortunately, however, their peace is short-lived, because the two move away again...