User blog comment:Jimeee/Skyrim 1.9 beta update adds Legendary difficulty and raises level cap (Updated Apr 8th)/@comment-99.33.94.13-20130317194530/@comment-4709478-20130317202202

The "Atttunement sphere" is stuck in one's inventory only because there's more than one way into Black Reach than the one shown through the main storyline (and i'm not referring to the lifts).

One is in the room where you get Grimsever. Another is where you kill Alain Dufont and/or gain an Aetherium Shard for the quest Lost to the Ages.