The Warrior's Path

Overview
Summary:
 * 1) Go to the Scar and slay the Orshad Chieftain.
 * 2) Return to Agastos the Brave for your reward.

Obtained from:
 * Agastos the Brave in Destiny's Gorge

Requirements
 * Ascension / Having accepted the quest The Hero's Journey (?)
 * Not being a primary or secondary Warrior

Reward
 * 1,000 XP

After completing this quest it will be possible to change your secondary class to Warrior.

Dialogue:
 * "Balthazar himself would tell you there is no greater hero than a Warrior. A Warrior is feared by all who face him. A Warrior needs not hide behind prayers or trickery. A Warrir trusts in his own strength and skill. Do you wish to be such a hero? It is not too late. I can show you the way, but first you must prove you have a Warrior's courage. Most feared among the desert Centaurs are the man-eating Orshad Raiders who make their home in the Scar. Strike down the Orshad Chieftain, and I will belive you have the heart of a Warrior."

Walkthrough
Exit Destiny's Gorge to the south-east and head south to the teleporter. Beware there are several groups of Hydras near it and you may be attacked while activating the teleporter if not cautious. The teleporter will bring you down into the valley to the east, where you will be "welcomed" by quite a number of centaurs. Follow the valley to the south-east until you come to a circular shaped wider part. In the middle you will find the Orshad Chieftain. He himself is not too strong and guarded only by two others, but there are several groups of centaurs patrolling around him so it's best to wait a bit and take out those patrols first.

It may also be feasible to approach this quest from Thirsty River.