From the publisher: An Ephemeris RPG sourcebook to help round out the Arbonix species. You'll be introduced to two Arbonix-specific sub-classes, a genetic variation of the standard species, new equipment geared towards the Arbonix character and their unique skills, and a form of combat that is only available to the Arbonix Plus you'll learn a little more about who the Arbonix are, and how they perceive the universe.