It is looted from Mercer Frey at the end of the Thieves Guild quest Blindsighted.
It is the quest item for 'Blindsighted' and later 'Darkness Returns', during which it is turned in.
- The original is turned in during the quest, so only the replica can be displayed.
- You only need to have had the item in your inventory for the replica recipe to be unlocked.
Made at the Replica Station in the Curator's Office with the following materials: