That's actually a good idea. A Netherwing roost like the Orc Red Dragon roost but swapped out. Makes sense, indicating the Netherwing dragon's are enslaved and it would make a very great addition to the Fel Orc's of Outland. Then again they can also just come out of the beastiary as well just like wyvern's and batriders. Those crystal formations around the nether wing roost would also make a great environmental doodad to add more diverse environment to Outland in world editor since basically everything is all hellfire peninsula.