The Mind Fog has been confirmed to be a Megadaemon of Fugue - a classification only it occupies, as an entity far stronger than any greater daemon of chaos but unaffiliated with any Ruinous power. It is formed from the stolen power and subconscious thoughts of the slann afflicted by it, and acts only to impose its core concept of confusion and slumber upon the slann - either passively through the mind fog phenomenon, or actively if it encounters any active slann in the Immaterium. It is confirmed to have been formed by the efforts of four greater daemons of chaos in an attempt to cripple the slann in a way that would not later backfire upon them.
Dispellation attempts may now be focused on a single generation of slann, which will reduce the fog's coverage of that generation depending on the strength of the effect. It is likely that the fog will regenerate over time unless consistent effort is applied towards it, or if its attention is otherwise diverted in the Warp itself by some means such as attacking it directly.
