It's not on my fast travel map (only Tenebrous Tangle and Bonemire are listed) and it's not an option at any spire. Is this bugged?
I had a character I logged out in Palace of the Awakened, and could not exit through the door. Nothing would happen. I also do not see Barren Sky on either Fast Travel or using the spires from Tenebrous Tangle.
Sometimes the goblins come and take a zone, usually its Lavastorm. It will come back, usually within a few hours.