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.
Mark 1
There were several people who were claimed to have the ability to perform exorcisms in the ancient world and many ancient opponents of Christianity dismissed Jesus as just another magician. Most descriptions of exorcisms at the time tended to involve the exorcist tricking the spirit or demon into leaving the victim by convincing them the exorcist had more power than the being, not a method Jesus employs. Parallels in Hellenistic cultural stories of exorcisms differ in that they usually involve an associated disease, which is not the case here. John P. Meier sees a clear distinction between these incidents and descriptions of magicians at the time.