Desperiona is an elite twilight dragon located south of the Ascendant's Rise in Mount Hyjal. She is summoned during the below quest near her feeding grounds[54.2, 85.6]. She is apparently the first recorded instance of a Twilight broodmother that can lay 'natural' Twilight eggs and she may be doing so for the Twilight's Hammer clan. Usually Twilight eggs are created by stealing and then corrupting eggs from the other dragonflights. Aviana assists players in slaying her during the below quest.
Patch 4.0.3 (15-Nov-2010): Added