Use a Fel Reaver Control Console to take control of a Fel Reaver Sentinel. Destroy 60 Deathforged Infernals before your fel reaver fails. When your mission is complete, report to Nakansi at Invasion Point: Cataclysm.
<Nakansi leafs through the manual.>
All the information is here, but be warned. These things weren't built to be controlled remotely.
We can modify one for you to use for a short time, but you'll have to work fast, or there's no telling what might happen! I wouldn't be surprised if your little stunt with the fel reaver catches the attention of the Legion scum, either. Try to keep yourself safe, but remember, the mission and the safety of Shadowmoon Village come first!