Thinning the Ranks and Secrets of the Flamebiders

When you are done with "Thinning the Ranks" and "Secrets of the Flamebiders" retrun them back in grab "The Thane of Voldrune".
Move back to Voldrune and finish "The Thane of Voldrune".

You need the red drake so you can kill the elite. When you riding the dragon fly and kill the elite. When you are done leave the quest and start move to Silverbrook to leave "An Exericse in Diplomacy".