Do quests and bounties to get to the required sunspear rank or character level. You will find Morgahn just outside The Astralarium. Once you accept Morgahn's challenge, a timed battle begins. You will face five level 8 Kournan Guards. The kill count for both your team and Morgahn's team are displayed same as with some PvP battles. If you defeat all of Morgahn's men, the timer ends and you may continue with the quest. Alternatively, as long as you don't have less than the Kournans when the timer expires, you will also be victorious. It's possible to start the timer and stand away from the guards without ever aggroing them, allowing you to complete the quest without any fighting. If you should lose, all you need to do is rezone and come back to restart the quest.