Power of Three

The Power of Three is the three combined powers of the Charmed Ones.

To Invoke the Power of Three, there is a spell used to unbind their powers. It is at the front of the book of Shadows. Phoebe cast it by saying these words:

Hear now the words of the Witches, The secrets we hid in the night, The oldest of Gods are invoked here, The great work of magic is sought In this night and in this hour, We call upon the ancient power Bring your powers to we sisters three, We want the power, Give us the power