From publisher blurb:
Now updated to reflect the new character options in Fizban's Treasury of Dragons!
The Draconomicon introduces new dragon species that were available throughout D&D's history. This document contains 10 new dragon species for use in your 5e games. Three chromatic dragons (the brown dragon, gray dragon, and purple dragon) and seven metallic dragons (the adamantine dragon, cobalt dragon, iron dragon, mercury dragon, mithril dragon, orium dragon, and steel dragon). Inside you can find stat blocks for each dragon, of all four life stages depicted in 5e's Monster Manual; wyrmling, young, adult, and ancient. Each set of dragons comes with appropriate lore pertaining to their lifestyles and habits, as well as their lairs and additional combat options such as lair actions. Additional Player Options are also provided at the end of the document, allowing dragonborn, draconic sorcerers, and my own dragon shaman class to choose new traits based on one of these new dragon types.