I helped a buddy get the derealization quest. But I did not pick up the quest myself. We ran the mission . I got the barrow dyad . I do not have an icon on my destination for the mission.
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The icon not being there is intentional as you haven't gone through the steps yourself to get it. To unlock the mission yourself you will need to: - Complete Act 1 (if you haven't already) - Find the blight within the Nether to get the 'The Taken Path' quest (blight is RNG) - Complete 'The Taken Path' quest up to the final step