Take the Head of Onyxia to Zardeth of the Black Claw in the basement of the Slaughtered Lamb.
You have accomplished the truly impossible. The brood mother of the Black Dragonflight lies dead at your feet. Seize her head and deliver it to Zardeth of the Black Claw.
By Nozdormu's teeth!
What? How did you get this? Isn't she... Never mind the details, I suppose. You'll be wanting one of these baubles as recompense, no doubt.
You will be able to choose one of these rewards:
You will also receive:
(or 4 50
if completed at level 100)
Upon completion of this quest you will gain: