Roll down to the training grounds and find Master Yoon, a male gnome monk. Tell him that you wish to challenge him. He will then walk to the middle of the training grounds. As he stops and faces you, you can /bow to him. He will then /bow back, turn hostile, and run towards you. During the fight he will try to heal himself. You should then use Spear Hand Strike to interrupt him. When defeated he says "Your power is impressive. I admit defeat."
When you hand in the quest to Master Hight, you get Enlightenment again. This buff gives you 50 % more experience from quests and kills. You can also choose between three red headbands (ever seen 80's Karate Kid?); one for healing, one for damage and one for tanking.
After handing in the quest, a daily quest becomes available: Practice Makes Perfect: Master Yoon. Enlightenment can stack two times, so the second quest will give an additional hour. Never do more than 2 quests at the same time though!
40 days to go!