A deal with the Devil or Faustian bargain is a cultural trope exemplified most famously by the legend of Faust and the figure of Mephistopheles, as well as being elemental to many Christian traditions. According to traditional Christian belief about witchcraft, the pact is between a person and the Devil or another demon, trading a soul for diabolical favours, which vary by the tale, but tend to include youth, knowledge, wealth, fame and power.