Return to Rexxar at Thunderlord Stronghold in Blade's Edge Mountains.
So you come from the world beyond the Portal? And you know of Rexxar. Oh yes, I am quite familiar with him.
You see, he is my son.
But he made his choice a lifetime ago. He is not one of us, and he is not welcome here. We have enough troubles, with the Bloodmaul ogres.
Know this: being born a half-breed does not make you Mok'Nathal.