Introduces gem dragons to fifth edition! Provides Dungeon Masters with tools to craft adventures inspired by dragons, including dragon lair maps and detailed information about 20 different types of dragons. Adds player character options, including dragon-themed subclasses for monks and rangers, unique draconic ancestries for dragonborn, additional spell options, and a feat. Presents a complete dragon bestiary and introduces a variety of dragons and dragon-related creatures-including aspects of the dragon gods, dragon minions, and more.