The Drowning Labyrinth
Complete the "Sundered Doctrine" dungeon to check on the status of the vault door.
Return to the depths of Rhulk's Pyramid and check on the vault door. Complete the "Sundered Doctrine" dungeon.
"Guardian, if you ever get tired of wetwork and want to try your hand at pure fieldwork, you call Chalco, yeah? She could make use of you." —Hidden Agent TRU-135