Buddha's Mystical Staff

Buddha's Mystical Staff is an ancient magical staff that is handed over between the twelve Chinese Zodiacs each New Year. Each year, one Zodiac is meant to wield to staff to continue the eternal cycle and maintain balance. The staff has the power to project the personality and will of the wielder to others. Each Zodiac carries it for an entire year, giving meaning to the twelve signs of the Zodiac.

Each year the staff is passed on to the next Zodiac in line in the Sacred Garden. During this day, the staff will be vulnerable to evil. If the staff falls into the hands of evil during this time, a year of evil will begin unless it is stopped before the day ends. If a Zodiac is killed by evil, the other Zodiacs are not allowed to carry or hold it; as it will upset the balance.

Notes and Trivia

 * The staff seemed to be at least partially sentient, as it was seen floating on its own several times. This is most notable when it's in the car with Piper Halliwell.
 * In an interview at the London Film & Comic Con 2012, Holly Marie Combs said that she took the Staff from set and still has it somewhere in her closet.