Kill Zuluhed the Whacked and recover Zuluhed's Key. Use Zuluhed's Key on Zuluhed's Chains to free Karynaku.
He hides in my thoughts, mortal. He waits for me to break... for me to bend to his will.
And this will be his undoing. I will call for him. I will tell him that I will do as he asks. When he appears, kill him and take the key!
Know this: Zuluhed is an ancient orc with unknown powers. He has surely been empowered further by Illidan. You risk your life for me in doing as I ask. Are you certain you wish to make such a sacrifice?