The call of Nanulg's battle-horn would be such an insult to the Orcs of Fil-gashan that they would not dare to ignore its call.
'For your final task, ${PLAYER}, you will take this battle-horn into Fil-gashan and look for the battle standard of the Orcs therein. When you find the standard, make use of it and defeat the Orcs that come to your call...and come they will. There is no way they can ignore the insult of their former leader's battle-horn being used to challenge them.
'Begin your search in a place where many Orcs gather. It is likely that their battle standard is there; and more likely still that the Orcs will answer the call of their fallen leader's battle-horn.
'Remember that your task in this fight as a captain is to inspire your fellow warriors to continue the fight.
'When you have won the battle, return to me.'
Fil-gashan lies in the south-western reaches of the Flaming Deeps.
Garnyd has instructed you to use Nanlug's battle-horn to challenge the Orcs in Fil-gashan.
Garnyd is at Anazârmekhem, north from Fil-gashan.
You should return to Garnyd with news of your victory.