Faustian

Of or pertaining to Faust, especially in the sense of being willing to abandon one's principles or values in order to pursue knowledge, wealth or other benefits.

• But along with this growth, there is at the same time developed in his breast, a Faustian conflict between the passion for accumulation, and the desire for enjoyment.
• Each transaction in the transient corresponds to a pragmatics that transforms the Faustian promise into an advertising slogan.