Jack Chick Is Now In High School Textbooks

The Christian clergy also practiced high magic. They could transform bread and wine into the body and blood of Christ (the sacrament of the Eucharist) and eternal penalties for sin into temporal ones (the sacrament of Penance or Confession). The also claimed the power to cast out demons who possessed the faithful.
In the late thirteenth century, the Church declared its magic to be the only true magic. Since such powers were not innate to humans, the theologians reasoned, they must come either from God or from the devil. Those from God were properly exercised within and by the church. Any who practiced magic outside and against the church did so on behalf of the devil.

WOW. The Curt Jester has more at Anti-Catholic Textbook