This quest is no longer available within the game.
Take the Head of Onyxia to Vol'jin in Orgrimmar.
You have accomplished the impossible.
The brood mother of the Black Dragonflight lies dead at your feet. Take her head and present it to your Warchief.
<Garrosh's stoic demeanor changes for a split second when he sees the enormous head of Onyxia. The mighty Doomhammer was nearly unsheathed.>
This is a great victory for the Horde, <name>. So many times you have honored your Warchief. It is time for the Warchief to honor you.
Upon completion of this quest you will gain: