Divide and Conquer - S1.E7

The W.I.T.C.H. girls go on a school skiing trip to show up Swiss exchange-student vamp Sondra, who seems to have mesmerized all the boys at Sheffield. Little do they know that Phobos wants to take advantage of this trip to divide them and separate the other four Guardians from Will and the Heart of Kandrakhar, the only thing that can activate their full powers.