Exorcism
In Christianity, exorcism is the practice of casting out demons. In Christian practice the person performing the exorcism, known as an exorcist, is often a member of the Christian Church, or an individual thought to be graced with special powers or skills. The exorcist may use prayers and religious material, such as set formulas, gestures, symbols, icons, amulets, etc. The exorcist often invokes God, Jesus and/or several different angels and archangels to intervene with the exorcism. Protestant Christian exorcists most commonly believe the authority given to them by the Father, Son, and Holy Spirit (the Trinity) is the source of their ability to cast out demons.
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".