Find Gor'tesh, somewhere to the west of Dreadmaul Rock. Kill Gor'tesh and then take Gor'tesh's Lopped Off Head back to Oralius in Burning Steppes.
They're reeling I tell you! Our next strike must be decisive.
The brute lord, Gor'tesh, must be slain. More importantly, his head must be returned to me so that I may prepare the third phase of our attack on the Firegut ogres.
Be warned, soldier, Gor'tesh rules not from Dreadmaul Rock but from a Blackrock orc structure to the west of Dreadmaul Rock.
Your orders, then, are simple. Find Gor'tesh and chop off his fat head. Return to me when the job is done.
SHUT UP, WINKY!