Definition of "mephistophelean" []

• Alternative capitalization of Mephistophelean (adjective)

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• "Summerland by Michael Chabon, published in 2002, is a doorstop children's fantasy that combines baseball, dirigibles, interdimensional travel, changelings, and a mephistophelean trickster legend into a big stew (which could have been simmered down a bit more)."
• "The short story draws on some recent search politics, namely Google's mephistophelean work in China, and adds digerati culture Burning Man, San Francisco."
• "So what mephistophelean miracle have you got in mind to achieve this, and what would I need to do?"