Stash of the "Monolith"

Dragunov gives us intel on thirteen Monolith stashes hidden around the Wishgranter in the Sarcophagus. When put together, all thirteen will open the path to a secret stash.
==Walkthrough==
All 13 stashes are shown on the video below.
==Notes==
* The Black Hole artifact you obtain is able to destroy any anomalies without being consumed. If you destroy any Grabbers or Arkhara's Stars before accepting the quest Cleansing, it will still count towards the goal of that quest.
==Bugs==
* Rarely, the final stash can be picked up twice and its contents doubled.