mephistophelean

• Using them to undo everything this apocalyptic warmongering cabal of hellish thugs did in their foul loathsome reign of mephistophelean terror. —  Propeller Most Popular Stories
• With his large-lensed glasses, he had a somewhat owlish appearance; everyone was rather startled when he appeared on the lecture dais at the start of one term with a beard that gave him a mephistophelean air. —  Books news, reviews and author interviews | guardian.co.uk
• His mephistophelean eyebrows were raised interrogatively, and he was smiling so as to exhibit a row of uneven yellow teeth. —  The Yellow Claw
• 15-year-old is also at the mercy of unhappily married couples with whom he is put in touch by the mephistophelean Mr Cox, who encounters him outside a hotel. —  Mail & Guardian Online

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