Crisis 02: Nightmare Fog is a Codex entry featured in Tom Clancy's Rainbow Six Extraction. It was unlocked for all players at the conclusion of the Nightmare Fog event.
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POST-CRISIS ABSTRACT:
The expedited development of Neurostim supplies helped manage neurotoxins in Operators, allowing the Crisis Protocol and Studies to be carried out. However, R&D has learned that the enemy can theoretically weaponize any element in the known universe.
STUDY RESULTS:
The Toxic Tree entity employs a chemical defense system, altering the air's composition through a network of structures to introduce fear-inducing hallucinogenic compounds. Exposure to this Fog interferes with human short-term memory. Effects can be successfully countered with Neurostims. Crisis Studies allow REACT to document the enemy's attempts to lower human morale.
CONCLUSIONS:
The Fog's composition and the Crab Nebula filaments exhibit similar characteristics, supporting R&D's theory: Crises are extensive Parasite Mutations. If the Parasite's repository of defense mechanisms is the universe itself, REACT may need to push forth an orbital ship project to detect early signs of incoming threats.