faustian
/ˈfɔːstɪən/Definitions
1. adjective
relating to or characteristic of the legend of Faust, especially involving a bargain with the devil
“The politician’s Faustian bargain with the corporation has come under scrutiny.”
2. noun
a bargain or agreement with the devil, especially in a situation where one is tempted to sacrifice something important for personal gain
“His Faustian pact with the underworld has led to his downfall.”