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In page The Infernal Desire Machines of Doctor Hoffman:

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Doctor Hoffman – an evil, sadistic scientist akin to Doctor Faustus.[citation needed] The doctor is the antagonist and diabolical adversary of the novel. He masters physics and surpasses his teacher, the proprietor; he later uses this ability to create a new form of reality in which nothing is bound by time or the normal rules of physics. With help from his colleague Mendoza, he discovers that "eroto-energy" can power his desire machines with omnipotent and everlasting energy. He uses his desire machines to fuel energy into his new reality. Desiderio describes Doctor Hoffman's laboratory in cinematic terms as a cross between the laboratory of the antagonist Rotwang in Metropolis and the Cabinet of Dr. Caligari.