Damnation (2017)

S4E13 Charmed and Dangerous

Title: Charmed and Dangerous Plot: The Source disrupts a long-standing pact between light and darkness by seizing The Hollow, a mystical mist that enables him to drain Piper and Paige's abilities. At the same time, Phoebe finds herself in a dilemma as she must accept Cole's assistance, even though her vision hints at a dire sacrifice he may have to make.