A deal with the devil or pact with the devil is a cultural motif, best exemplified by the legend of Faust and the figure of Mephistopheles, but elemental to many Christian folktales. According to traditional Christian belief in witchcraft, the pact is between a person and Satan or a lesser demon. The person offers his or her soul in exchange for diabolical favours. Those favours vary by the tale, but tend to include youth, knowledge, wealth, fame, or power.