Cole enlists the help of Andras to help him to get rid of the Charmed Ones to take the Book of Shadows, soon Andras uses his powers and the sisters begin to fight against each other, and causes their magic to dissapear.
As the sisters are without their magic, Cole has the opportunity to kill the Charmed Ones, but he can't just do it after Phoebe so defenseless and so sad. When Andras sees this, he possess him in order to attack the Charmed Ones.
Such a great episode that you shouldn't miss, the Charmed Ones versus each other. Wow!