A class of creatures made by Deathwing himself that doesn't have elements of the Black Dragonflight.
DH I understand why its 2 specs, Evoker makes absolutely zero sense lore-wise why it wouldn't have an Earth Warder-esqe spec that tanks. If they story was that the OTHER dragonflights made them when Neth went nuts, then you could argue it. However, they clearly stated that these creatures/spec were made by the black dragon himself..... and they have no black in them.
Feels lazy, like they didn't want to bother making 3 specs.