1. mephistophelean - Adjective
2. mephistophelean - Adjective Satellite
showing the cunning or ingenuity or wickedness typical of a devil
Source: WordNetdevilish schemes Source: Internet
the cold calculation and diabolic art of some statesmen Source: Internet
the diabolical expression on his face Source: Internet
a mephistophelian glint in his eye Source: Internet