Unshakable Nightmares

Walkthrough

 * Enter the Walk of Echoes from Grauberg (S) for a cutscene.
 * Entering from another location still gives this cutscene, but you MUST enter from Grauberg (S) in order to proceed with the NEXT mission.
 * Retracing and then using a Campaign Arbiter to warp to Grauberg (S) is the fastest way to reach this entrance to the Walk of Echoes.