From WoWWiki

Terror Wing Path is the valley located in the eastern region of the Burning Steppes. Terror Wing is home to many whelps and dragonkin of the Black Dragonflight. There are also several black drakes patrolling the stretch of the valley. The rare elite magma giant Volchan can also occasionally be found wandering through the path. Only the highest level adventurers should journey through Terror Wing Path, and even so it is advised not to do so alone.

The dragonkin and drakes used to be elites until Patch 2.3.0

Subzones of Burning Steppes
Altar of Storms • Blackrock Mountain • Blackrock Pass • Blackrock Stronghold • Draco'dar • Dreadmaul Rock • Flame Crest • Morgan's Vigil • The Pillar of Ash • Ruins of Thaurissan • Slither Rock • Terror Wing Path