"X is for Xanadu" is the twenty-fourth episode of the second Season and the fiftieth episode overall of W.I.T.C.H. It first aired December 9, 2006.
While the Guardians are trying to stop him, Phobos turns Meridian into an evil kingdom again.
In the B-story, Hay Lin has to complete an art project on Xanadu, her vision of paradise.
- At one point of the battle between Phobos and the Guardians, Will's skirt is pink instead of teal.