Cole tries to give up the Source to the Wizard after his human side becomes strong and Phoebe learns through a premonition that he is a demon again. But before the ritual is complete, the Seer, who has manipulated Phoebe, interrupts and vanquishes the Wizard. Cole is crowned the new Source with Phoebe as his Queen. Cole faces a coup in "Long Live the Queen" when Phoebe stops the killing of an innocent. Cole demands she make a choice. Phoebe later learns from the Seer and Cole that the tonic they were giving her was turning her evil. Phoebe eventually sides with her sisters and before Cole can destroy them she traps him in a crystal cage which allows the Charmed Ones to vanquish him.