The Gelkis Khan is dead, and now the Maraudine will fall!  Kill the Maraudine Khan, Hratha!$B$BTo face him, blow the horn on the high bluff in the Valley of Spears.  But to blow the horn, you need a mouthpiece.  To get a mouthpiece, kill Maraudine centaur.  Keep killing until you find a mouthpiece.  Then blow the horn.$B$BDo this and Maraudine centaur will come to the tower.  Kill them until Khan Hratha appears.  Hratha holds the piece of a key.  Give this piece to me...