Here’s what a pact with Satan looks like:

I deny God, Father, Son, and Holy Ghost, Mary and all the Saints, particularly Saint John the Baptist, the Church both Triumphant and Militant, all the sacraments, all the prayers prayed therein. I promise never to do good, to do all the evil I can, and would wish not at all to be a man, but that my nature be changed into a devil the better to serve thee, thou my lord and master Lucifer, and I promise thee that even if I be forced to do some good work, I will not do it in God’s honor, but in scorning him and in thine honor and that of all the devils, and that I ever give myself to thee and pray thee always to keep well the bond that I gave thee.

This one was presented as evidence against Urbain Grandier, a French Catholic priest who was executed for seduction and witchcraft in 1634.