In Service of the Illidari is a Netherwing quest. Players deceive a Dragonmaw Overlord into thinking that they are a recruit to his labor force, in order to better subvert the goals of the orc clan. Players must complete  before accepting this quest. After completing the follow up to this quest,  , all of the quests at neutral with Netherwing are available.
You will need:
Netherwing Ledge... What was once a bastion of sanctuary for the Netherwing is now home to the Dragonmaw. While the orcs may have control of our territory, our magic there is still strong. Strong enough to cloak your true identity and allow you to infiltrate the ranks of Dragonmaw.
I have prepared this letter for you to present to their leader, Overlord Mor'ghor. Fly headlong into the maw of our enemy and seek out Dragonmaw Base Camp to start your new life as a fel orc of Illidan Stormrage.
<Mor'ghor reads the letter and laughs.>
A death knight? You couldn't shine the boots of a death knight, maggot.
<Mor'ghor looks you over.>
But yes... You might be able to work your way up to peon. At the worst, I'll toss you into the pit and leave you to die...