master race
From Longman Dictionary of Contemporary Englishmaster raceˈmaster ˌrace noun [countable] a race of people who consider themselves better than other races, and who believe that they should rule over themExamples from the Corpusmaster race• Gordon Gordon was definitely no great advert for anything, least of all a master race.• Why not just stick to our future as slaves of a robot master race?• The officials saw their very existence as an affront to the creation of the master race.