At level 15 or higher, go to the Multiquest. Click on the girl in the black, then select 
the quest for the Kayda Reaver. It is best to have a good ice weapon. If you encounter a 
Drakel Air Raider or a Drakel Captain, kill them and click on their weapon before you 
click "Next". Alternately, fight monsters and eventually you will encounter a Drakel 
Air Raider. If you are a Fighter, the third boss is a Drakel Captain.