The Auroral Diamond is the heart of the Radiant Citadel. A massive gemstone of unfathomable power, its life-giving magic runs through the entire city; the city’s vegetation, water, light, and unique artifices depend on the Diamond.
The Auroral Diamond changes color for unknown reasons. Sometimes it holds a color for an entire year, while other times it shifts twice in a single week. Rarely does it ever repeat a color. Some scholars believe each color represents the birth of a new civilization somewhere in the multiverse, and repetition of a color means the death of that civilization. Other scholars hypothesize the changing colors are a countdown to some unknown event.
The Auroral Diamond is indestructible. Whatever magic hollowed out the gemstone’s center and created the Preserve of the Ancestors is unknown.