Two of the Orc-tribes of Angmar, the Blogmal and the Tarkrîp are in conflict over mining rights in Bornabar.
'Greetings, ${PLAYER}! Are you here to aid us in our struggle against the Orcs of Angmar?
'Angmar has sent two tribes of Fire-orcs into the Rift, which they call Nûrz Ghâshu, to mine the metals which may be found there -- which I suspect are of the finest quality! It would be far too dangerous for me to venture alone into their mines, but perhaps you could, with aid.
'If you go there, seek out Barz and Zurm, the Gorthorog-overseers of Bornabar, and defeat them. I understand they not only put Orcs to work, but also slaves from among the Hillmen of Angmar.'
Barz and Zurm are in Bornabar, within the crumbling seal below Iorelen's camp.
Jónsi has asked you to enter the mines of the Orcs and defeat the Gorthorog-overseers, Barz and Zurm.
Jónsi is at Iorelen's Camp.
You should return to Jónsi and tell him of your victory against Barz and Zurm.