The flame that burns on a Solire egg cannot be extinguished while the creature inside lives. Even after hatching, the shell fragments will remain strangely warm for several days before eventually turning to ash.
Solires have long been associated with light and the sun. Stylized depictions of a Solire's crest can be found adorning the walls of ancient sun temples. It is very easy to see why ancient societies made the connection between the sun and the Solire, as they have the power to wield not just fire but light as well. This power can be used to create impressive light shows and illusions, which become exceedingly lifelike the stronger the surrounding light is.
A few cunning and ambitious Solires used their powers as proof of their divinity and gained a following of worshipers who saw to their every need. Wars were waged between the cults of the divine Solires and the Solires who did not claim divinity but instead sought to bring down their more deceptive brethren.