Originally Posted by
Mace
Highborne are night elves that the Queen could find who were very talented with the arcane, they're not a special race of night elves, it isn't only those who are descended from Highborne that are talented, they come from night elves, so that magical talent is in night elves. this is why the Shen'dralar are able to replenish their numbers, they're doing what Azshara was doing, testing and picking night elves with great talent from the arcane. Illidan is a classic example of a night elf with arcane talent rivalling Azshara, but he wasn't Highborne. The queen canot test everyone in the empire, so there where would very talented non-Highborne night elves, even with the caste formed , the concentration of arcane talent would be higher within it because of breeding passing down, but the same talent would show up in the population.