The Star Case brings the Winx to Dyamond, a frozen and deserted world on which the seventh and last prime star is hidden. the conquest is fundamental, since those who in the end have more primary stars in his possession will automatically obtain those of the opposing group. Trix also arrive on Dyamond, although Icy was initially hesitant, and encounter a white fox; the Winx also stumble upon her during their exploration, and Sky, gone with them to be near Bloom, picks him up Seeing him, Icy attacks him causing him to end up in a frozen lake. The Winx are transformed into Sirenix fairies to save him.
