*blinks*
Yes... I did not need to know that. Still, the Kharagh is just sorta... out there, that's true. Other 4th level units are easily explainable, but Kharagh isn't. I suppose it's some sort of beast goblins tame and send at the enemy, but who knows? I don't think there's a fluff description for particular units anywhere.
Either way, the goblins' weakness irritates me, because they're my favourite fantasy race. They're better in AoW2, which is generally better designed, but it's got this whole nonsense with wizards going on...