The Darkest Season of Charmed!Following Prue's death,season 3 brings the arrival of Paige Matthews - half sister to the Halliwells. The girl's mother Patty had a love affair with her whitelighter Sam and discovered she was pregnant.
Prue found a locket on her desk at Bucklands. She opened it, and out came a warlock from the 1700's. He tried to come closer to Prue. Prue pushed him away with her power.