We had always assumed that the Blackrock orcs were a product of their savage upbringing. What we have found here, in their homeland, tells us another story.
Indeed, it is bloodlust and thirst for conflict that empowers them, but the black dragonflight are the beings whom control the orcs of Blackrock. We suspect that it is the black dragonflight that fuels them with rage and hostility.
Take this letter to Magistrate Solomon. He will know what must be done.