Exorcism
In Catholic practice the person performing the exorcism, known as an exorcist, is an ordained priest. The exorcist recites prayers according to the rubrics of the rite, and may make use of religious materials such as icons and sacramentals. The exorcist invokes God—specifically the Name of Jesus—as well as members of the Church Triumphant and the Archangel Michael to intervene with the exorcism. According to Catholic understanding, several weekly exorcisms over many years are sometimes required to expel a deeply entrenched demon.
Exorcism
In Taoism, exorcisms are performed because an individual has been possessed by an evil spirit for one of two reasons. The individual has disturbed a ghost, regardless of intent, and the ghost now seeks revenge. An alive person could also be jealous and uses black magic as revenge thereby conjuring a ghost to possess someone. Members of the fashi, both Chinese ritual officers and priests ordained by a celestial master, perform Chinese rituals, in particular, exorcisms.