Nightmare Cycle

Flux is a state present in Ruins. It periodically goes up and down.

Low flux
During low flux, there is no ambient sound and illuminated areas have bluish tint. In this state, Nightmare Lights stay closed.

Medium flux
The onset of medium flux can be recognized by illuminated areas turning into sepia tone instead of blue and an quoet ambient sound starts to play. During medium flux, Ancient Statues begin to glow and nightmare lights open up, illuminating a small area around them.

High flux
During high flux, the illuminated runic turf starts to glow red and ambient noise is louder. In this state, statues get covered by black goo. Nightmare lights will glow stronger, illuminating more area. During high flux, they also spawn Hallucinations, regardless of the player's sanity level.