Mephistophelian
adjective/ˌmefɪstəˈfiːliən/
/ˌmefɪstəˈfiːliən/, /ˌmefɪˌstɑːfəˈliːən/
(formal)- very evil; like the DevilMore Like This Expressions from history and legendExpressions from history and legendWord Originmid 19th cent.: from Mephistopheles, an evil spirit to whom Faust, in the German legend, sold his soul.
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Mephistophelian