Megalomania
megˇaˇloˇmaˇniˇa
ˌmeɡələˈmānēə/
noun
obsession with the exercise of power, especially in the domination of others.
synonyms: delusions of grandeur, folie de grandeur, thirst/lust for power; More
delusion about one's own power or importance (typically as a symptom of manic or paranoid disorder).