Power of Three

"The bond between you three is what keeps the power of three running. Without it there is no Charmed Ones."

-Leo to the girls

The Power of Three is the collective power of the Charmed Ones. The triquetra represents the bond between the three sisters. There are many different powers including the Power of One, and the Power of Four. But the most common used in the new series is the Power of 21 and the Power of 7.

The Orginal Power of Three
This power of three contains the orginail Charmed Ones. Piper, Phoebe, and Prue. These power of three went on for three years until Prue died and was replaced with Paige.

The New Power of Three
This power of three contained Piper, Phoebe, and Paige. This lasted for many years it the power of three was passed on to the Charmed Children.

The Power of Nine
This was used when the Charmed Ones' children were fighting demons. Three groups of three children. This was most used because it was not sure which group of children would actually obtain the power of three. It's probably Piper's kids, because they were born and came into their powers first.

The Power of 21
This is used when all the Charmed Grandchildren get together and fight together. Since each Charmed One had seven grandchildren, this was also known as Three Powers Of Seven.

The Power of 7
This is used when all the grandchildren of one Charmed One comes together. This is most commonly used by Paige's family, because Piper and Phoebe's family use the power of three. But this doesn't mean that their families won't use it in the future, it just means it's not as likely.

The Power of Three Sisters (New Generation)
This refers to Piper's granddaughters Saphire, Sage, and Siam. They are the most common Power of Three in the new series right in front of Piper's kids, Piper and her sisters, Charlie, David, and Parker, and Phoebe's grand- sons.

The Power of Three Brothers
This refers to Phoebe's grandsons Percy, Perry, and Preston. They are the fourth most common power of three seen in the series.

Power of Three Husbands
This refers to Parker, Charlie, and David. It is seen that these three men can work together to make a somewhat different power of three. It isn't seen as much as the girls, or Piper and her sisters, but it is seen more than Phoebe's grandsons. This may also refer to Leo, Henry, and Coop.

Evil Power Of Three
This refers to the Demon Brothers Kabar, Kody, and Kristian. They are the exact opposite of the Charmed Ones. The girls are whitelighter-witches, these boys are darklighter-warlocks. They were sent by a powerful demon council to destroy the Charmed Ones, in order to keep the Halliwell family from expanding.