This Witch-A-Day post is on Charmed. After the death of their grandmother, the Halliwell sisters find the Book of Shadows and discover they are witches, each with a unique power. Prue (Shannen Doherty) had the power to move things with telekinesis. Piper (Holly Marie Combs) could freeze (not in the ice sense) objects. Phoebe (Alyssa Milano) had premonitions. Over time, their powers increased and they discovered new ones.
Together, they were the most powerful witches fighting against evil and demons. By combining their might in "The Power of Three" they could vanquish powerful demons and defeat most foes. Sadly, Prue died at the end of season three and it looked like "The Power of Three" was broken, but luckily, their mother had an affair with her guardian (Whitelighter) and the girls found their half-sister Paige (Rose McGowan). While the mythology became muddled over time, the show was entertaining enough to last a total of eight seasons.