Sun dragon

Sun dragons, also called solar dragons, were relatively benevolent dragons capable of natural spelljamming.

Description
Sun dragons had a largely draconic build (four legs and two wings, long neck and tail), though slightly more serpentine than ordinary; in some accounts their forelimbs ended with a set of fins or secondary wings and their primary wings glowed.

Sun dragons changed color over the course of their lifecycle: at hatching, they were a fiery red that changed to burnt orange as juveniles, which in turn lightened to brilliant yellow as mature adults before paling to bluish-white when venerable. Finally, great wyrms not only paled again to bright white, but also shrank in size almost back to that of a hatchling.

The eggs of solar dragons were shiny, obsidian-black spheres that turned translucent just before hatching.