Location: This quest takes place in Stonetalon Mountains.

Shortly: Lieutenant Paulson at the The Deep Reaches wants you to kill 12 Krom’gar Assassins.

How to: Head deeper into the mines and kill assassins. Wearing the Infrared Heat Detection Device helps you “see” them. After killing 12, click the on-screen quest-finisher text to finish this quest.

The Reward is 250 reputation with Stormwind.