Mabel Stillman

Mabel Stillman is the oldest of the three Stillman Sisters. In The Power of Three Blondes, they each stole the Charmed Ones' powers and identities. Being the eldest of the Stillman sisters, Mabel obtained Piper's identity, and later her powers. After Chris broke their spell, the Halliwells bound Mabel's powers, and she was sent to jail for murdering a vacuum salesman and a family who lived across the street from the manor.

Powers & Abilities
Like her other sisters, Mabel had the power of shapeshifting. She also had the power of conjuration. It was her idea in the first place to use an &quot;identity theft&quot; spell to make the world think that she and her sisters were the Charmed Ones. The sisters could also teleport via a special spray potion.

Piper's Powers
After stealing the identities of the Halliwell sisters, the Stillman sisters lured them out of the Manor so they could use the Book of Shadows to steal their powers. After doing that, Mabel gained Piper's powers of molecular immobilization and molecular combustion.

Though she figured out how to use Piper's powers, she couldn't control them nearly as well as Piper could--most likely due to her lack of experience with them, as well as the fact she was a low-level witch attempting to use an upper-level witch's powers. Her blasting aim was terrible, though she did manage to blast Piper into a wall and severely injure her leg. She also couldn't freeze until Piper tried to kill her with a crossbow. Mabel panicked, just like Piper did for much of season one, and froze the sisters.

Chris figured out what was going on and provoked the Stillmans into fighting each other, breaking their Power of Three bond. The real Charmed Ones then took back their powers, bound the Stillmans' powers and handed the Stillmans over to Darryl, who sent them to jail.