Blade's Edge Mountains (Located in Outland - Through the Dark Portal) is a region full of knife-sharp mountain crags and axe-cut valleys. The green glow in the sky is part of the twisting nether - a floating energy that affects the remains of Outland and binds it together in a suspended phase. The mountains are inhabited by humanoidal Rock Flayers and a substantial population of ogres. This zone is located to the north of Zangarmarsh and to the west of Netherstorm. Likely contains some of the so called "Green Havens". The zone has three distinct terrain types, it's rocky valley, forested slopes, and barren plateau summits. Using this definition, the zone has four "mountains" that are interconnected.
When the human armies invaded Outland, Mogor of the Laughing Skull Clan of ogres sided with them in exchange for the dominance of his Clan in the Blade's Edge Mountains.
The ogre clans of the Blade's Edge have dominated the lower canyons and ravines, along with their Gronn masters. It is possible that this harsh land is the birthplace of the ogres.
Worldofwarcraft.com says the following about the Blade's Edge Mountains:
The harsh winds that rip through the canyons of Blade's Edge have, over time, worn the bordering escarpments into menacing, dagger-like spikes that lend the region to its name. This foreboding realm is also the homeland of the brutish ogres, who wage constant, fierce battles against one another to gain the favor of their merciless gronn masters.