Master race

Karl believed the Cybermen, who he knew as giants, to be the master race. (TV: Silver Nemesis)

Using the Immortality Gate to transform the vast majority of the human population of Earth into duplicates of himself on Christmas 2009, observed to the Tenth Doctor that the human race had been replaced by "the Master Race". (TV: The End of Time)

The Daleks proclaimed the creation of the New Dalek Paradigm as the "resurrection of the master race." (TV: Victory of the Daleks)

The Nazis believed in a concept of a "master race", through which they asserted that Aryans were ultimately superior beyond any other race. Central to this belief was the idea that Aryan blood contained a "central mystique" which should remain uncontaminated by "lesser breeds" and "under-men". (PROSE: Timewyrm: Exodus)