"You know. Humans, gargoyles, and Oberon’s children."
"I thought everybody knew this?"
The Three Races are Humans, Gargoyles, and the Children of Oberon. Aside from the three “main” races, there are also two synthetic races, mutates beings composed of human and animal DNA, and androids, robotic beings, as well as the New Olympians, a hybrid race descended from the Children of Oberon and mortals. The children of Oberon are notable in that they are the only of the three races, with the potential exception of androids, who are immortal.
Love how Lex just pops up from nowhere.