Answer: megalomania

AnswerCrossword Clue
MEGALOMANIAHitler's delusion.
MEGALOMANIADelusions of grandeur
megalomaniaObsession with the exercise of power, esp. in the domination of others
megalomaniaDelusion about one's own power or importance (typically as a symptom of manic or paranoid disorder)
megalomaniaa mania for great or grandiose performance