From publisher blurb:
WARNING – this book will lead to the deaths of many adventurers!
Contained herein are some of the realms’ most twisted, corrupt, and conniving creatures – fearsome foes to test the strength of those unfortunate enough to encounter them. The realms are not all death and danger, however; this tome also contains cute critters, interesting animals, and plenty of helpful and intelligent denizens with communities and history of their own.
Wherever your adventures take you, something from the Creature Compendium will be there to greet you!
The Endless Realms Creature Compendium contains:
Over 250 creatures
Many alternate creature variants to keep players on their toes
Rules for creating custom creatures
Rules for adjusting the strength of creatures