Rift Quest:Korbosh  

Due west of Coterie Camp you will find Dreadbone Shelf. Korbosh is located all the way at the back of the camp at 5216, 5336. Slay him to complete the quest. It is also worth mentioning that if you examine the Troll Glyphs behind where he stands you will get the achievement "Message Received". Return to Keegan Olandra to collect your reward.