Spirit Board (general)

The Spirit Board, also known as an Ouija Board, is a device used to contact the spirit world. Although only used a few times, it has helped the sisters in many ways.

Receiving their Powers
The Charmed Ones originally received their powers because of the spirit board. The board spelled out "Attic", which lead Phoebe Halliwell to find the Book of Shadows. She then cast the spell for the Charmed Ones to receive their powers. The sisters' mother Patty Halliwell, wrote an inscription on the back of the spirit board before she died, telling the sisters that the "Power of Three, will set them free."

Finding a kidnapped boy
Prue found a kidnapped, young male witch named, Max Franklin, through the use of the spirit board with Leo's invisible assistance.

Finding the name of a demon
In Witch Trial, Grams revealed Abraxas' name, by using the spirit board.

Contacting those on other planes
When Prue was trapped in an unknown plane, she contacted her sisters by using the spirit board. But every time, she gets interrupted by War, one of the Four Horsemen of the Apocalypse, who was also trapped. While chasing away Prue, he shoved the pointer down on the floor and shattered its glass. This was the last time it made an appearance in season 2 and did not reappear until season 8.

Calling Help
The spirit board made its first appearance for the first time in 6 years. When trapped inside the dollhouse, the Charmed Ones combined their magic to contact Billie through the spirit board.