Which race would you add to Heroes?

I only suggested a short-lived, powerful race needed solely for a fundamental new development of the plot. Which could completely change the concept of the game, for example: during the war of all united races against the invading race, it turns out that humans are cowardly creatures, not ready to sacrifice part of their numerous army, Necropolis is a race that bravely charged into battle, but without support from its allies, it found itself on the verge of destruction, and so on.