This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Speak with Franclorn Forgewright at Forgewright's Tomb in Blackrock Mountain if you are interested in obtaining a key to the city major.
Greetings, <name>. I am Franclorn Forgewright. Yes, the Franclorn Forgewright responsible for the stonewrought method of architecture. You have undoubtedly passed through or stood upon one of my creations in your adventures across our war torn world.
You are probably wondering why I am here and what it is that I want from you - both valid questions.
I need your assistance, of course. In exchange for your assistance, I shall grant you the key to the depths of my accursed city.