Stúkha handed you a banner and instructions to taunt the Haradrim at their encampment in order to draw out and defeat their strongest fighter.
The Haradrim camp of Grijâti can be found south of Jax Phanâl and west of the road.
'Haradrim raiders still linger in our lands to the south, encamped at a place they name Grijâti. The strongest among them will enter into single combat with anyone who plants my banner. It is a sign of respect, but also a ruse, as I will not be the one fighting!'
The emissary winks and laughs heartily.
'You will fight in my stead! Defeat the raider and he is bound to honour the treaties of our past by making his way to me here at Jax Phanâl.'
Make your way to Grijâti, the Haradrim camp south-east of Jax Phanâl. Once there, find the ritual circle and plant the banner to draw out and challenge the strongest of the Haradrim warriors.
You defeated the Haradrim leader, and he said he would honour the pacts of the past. You should return to Stúkha at Jax Phanâl.