Previously used to clear out excessive methane that had built up within the facility.
- Found along the Siren's Watch along the Northeastern edge.
- Go along the outside edge to find the open doorway to lead into the Lost Sector.
- Take the stairs down and follow the passage forward to reach the Lost Sector.
- Inside is a few rooms with a number of Acolytes.
- In the first room, you will find Karugul.
- You will see Karugul move to the back room when she takes enough damage.
- Through you will be under fire from the Hive forces.
- All of them are ranged fighters, all the Knights and Acolyte.
- In the very back, on the elevated platform, you will find the Champion's cache.