Racial Trait is one of interesting features in WoW. It makes each race has its own characteristic. But we know that there is always an extremely powerful Racial Trait in one version, although Blizzard keeps balancing all races' traits. For example, Undead's Will of the Forsaken was extremely powerful in Old World version, especially for Rogue. It allows Rogues to cancel enemies' fear, charm, sleep spells and get immune effect for 20 sec. So, at that time, we can see that most rogues are Undead. Afterwards, Human's trait became very powerful. And then you can see human everywhere....etc. So, each change of Racial Traits will affect the number of some race, of course, apart from female Dwarf. Today, Blizzard released the changes of Racial Traits in Warlords of Draenor. Which race will become the most powerful race? We'll see.