Did a search on the forum, but I couldn’t find it. Anyway, after meeting the requirements for the Untethered achievement for Blood Harvest personal story in Heart of Thorns, I did not receive the achievement. I’ve talked with several guild members and they are in the same boat. I had heard that you not only need to avoid the tentacles on the helix, but you also need to avoid even getting downed for the entire instance to get this or keep from getting hit from anything on the helix, even the enemies. Just not sure what is going to actually trigger the actual achievement, but it’s sure not just what the description says.