Dimitri is the Captain of the Guard in Castle Kalindra. He is too depressed to do any good and his daugther quests you to find the Songbird of Serenity. If you have not done this yet, do not read on.When you bring back the Songbird of Serenity from the Dungeon of Lost Souls, Dimitri sends you to speak to Ambrose in the northern part of the desert. You might have met up with Ambrose earlier, but he when you tell him Dimitri sent you, he will give you a bridle which you must enchant. This can be done by an enchantress in Sandcaster (for a steep fee) and when you bring this bridle back to Ambrose, you`ll get your way into Castle Blackfang. 
