This is a higher level version of the original Scornfeather Roost zone that was first introduced with the Desert of Flames expansion. You can select this instance by clicking on the entrance to the Clefts of Rujark.
The progress through this instance is identical to the original version. You must kill all of the named bosses, and then Ibtinaya the Scorned will become attackable.
Notes[]
You must be adventure level 94 to enter this zone.
The rewards are level 95 legendary and fabled items.