The Sovereign Dossier materialized during the first impossible sighting of the ice phoenix, its pages crystallizing from the frozen vapor trail left in the creature's wake. Ancient prophecies and modern incident reports bound themselves together in its leather-wrapped form, creating the definitive record of supernatural phenomena at Art Dye.

The dossier appears as an obsidian-black leather folder with frost-etched silver clasps, its contents perpetually cold to the touch. Within, perfectly preserved papers spiral outward from a central ice-blue seal, their arrangement suggesting flight paths through the investigation's most crucial moments.

The dossier silently influences investigations by revealing or obscuring evidence based on the investigator's approach, much like a course revealing its secrets to those who read its subtle breaks and winds correctly.