Rites and rituals are an essential part of Tibetan religion and reflect its practical side. Not restricted to temples alone, they are performed in a variety of places and circumstances, for a myriad of purposes. Throughout the year, too, special rituals are performed to propitiate deities, to precipitate rain, to avert hailstorms, diseases, and death, to ensure good harvests, to exorcise demons and evil spirits, and of course to destroy the passions of the mind and, ultimately, the ego. All these practices-whether occult, magical, or shamanistic, require various implements which are as important as the images of the deities in whose service they are employed. Each such object is pregnant with symbolic meaning and is frequently imbued with magical power and potency.