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.
Minor exorcism in Christianity
In addition to these exorcisms, the Rite for Adults includes three ceremonies called scrutinies, to be celebrated as integral parts of the Sunday Eucharist on the Third, Fourth, and Fifth Sundays of Lent. Each scrutiny contain a prayer of exorcism reserved to the deacon or priest. There is also a simplified set of prayers provided for use with children mature enough to be personally catechised. The only minor exorcism in the children's rite is part of a one-off scrutiny which is offered in two forms. Both texts use the image of entering the light of Christ, turning respectively from "darkness" and from "whatever could make them bad".