This quest is not available in game.
Read Baelog's Journal, explore the hidden chamber, then report to Prospector Stormpike.
- Explore the Hidden Chamber
Now for the task at hand.
There is a secret chamber, the Chamber of Khaz'mul, that must be explored. The problem is that the chamber's behind a huge, locked door! It's a lucky thing I know how to open it.
I've described everything in my journal, here on the table. My band and I are stuck here for now... so you, <name>, must find the chamber of Khaz'mul for us!
Read my journal, explore the chamber, then report to Prospector Stormpike at the Explorers' League in Ironforge.