Have you done the prerequisite quests to unlock them in collections first? if not can you go to Micah-10 (Micah's Conduit) in the Pale Heart and see if you have quests listed under the 'The Final Days', some of those are what award the armor. If they aren't at Micah-10, check your quest log and abandoned quest kiosk for: - The Hellmouth - The Return - The Shadows - The Oracle - The Ascendant - The Past - The Veiled - The Illusion - The Visitation - The Desperation You'll be able to see which item each quest rewards by looking at the 'Reward' section of the tooltip.