This is the quest that Yelnar gives players to retrieve an item from Dozekar the Cursed in heroic Skyshrine. At the completion of this quest he will give you an item that, when consumed, will make him a tradeskill apprentice. 
First talk with Elder Yelnar at Eldar Yelnar: -1325.82, -1088.27, -233.23
Defeat Drozekar to get a item he wants you to get. NOTE:T his will only drop once per raid group, not everyone will get a stone.
Using a forge craft the stone Yelnar wants
Give the stone to Yelnar and you get his binding stone which will let you make him a tradeskill apprentice for use.
NOTE:This quest is repeatable so it can be done over and over again.