From publisher blurb:
A New Shade of Dragon!
There are many kinds of dragons, and as new Pathfinder Bestiaries have come out, the number has only continued to increase. Chromatic dragons, metallic dragons, oriental dragons, primal dragons, and so many more. You might think that with all those dragons already out there, there’s no need for any more. If so, you’d be wrong.
This book presents a new type of true dragon, the yellow dragon. Creatures inherently tied to age, decay, and the passage of time, these mysterious dragons possess a unique breath weapon that ages their victims rapidly, as well as numerous other unique powers relating to the manipulation of time and the forces of entropy. The book contains an overview of the yellow dragon’s abilities, an ecology of the yellow dragon, and a full stat-block for yellow dragons of each and every age category from wyrmling to great wyrm.