Obtain the Twilight Slaver's Key and free 6 Enslaved Miners.
According to the orders you found, there is a key inside the tent in the southeastern end of Deathwing's Fall.
Obtain it and free the slaves in the quarry to the south.
You will be able to choose one appropriate item for your class from the following rewards:
|Bondbreaker Gauntlets||Rough Stone Carapace|
You will also receive:
- 12,460 experience
- 8 20
- 250 reputation with The Earthen Ring