Faustian Bargain or Deal with the Devil is the ability to make the wishes of the mortals it deals with come true. 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, or power.
It was also believed that some persons made this type of pact just as a sign of recognizing the devil as their master, in exchange for nothing. The bargain is considered a dangerous one, as the price of the Fiend's service is the wagerer's soul.
The tale may have a moralizing end, with eternal damnation for the foolhardy venturer. Conversely, it may have a comic twist, in which a wily peasant outwits the devil, characteristically on a technical point.
The person making the pact sometimes tries to outwit the devil, but loses in the end; example being that the man sells his soul for eternal life because he will never die to pay his end of the bargain. Immune to the death penalty, he commits murder, but is sentenced to life in prison..