Furious debate divides those that seek knowledge in order to aid the City, and those who seek knowledge for its own sake.
― In-game description
"Existential Threats" can be retrieved from one of the following activities/vendors:
|This item can drop as a Quest reward.|
|This item can drop as a Crucible match reward.|
|This item can drop as a Strike reward. Exotic items can only drop from the most challenging Strike playlist.|