From the publisher's website:
No matter where your Star Wars Roleplaying campaign leads you, the Creatures of the Galaxy Adversary Deck allows you to enhance your settings with different creatures that might be native to the environment. The Rancor, the Wampa, and the Nexu – they're all in there, as are a number of beasts your characters might hope to train as mounts or companions.
Whether your characters encounter them in combat or in other situations, the twenty different creatures from this Adversary Deck all come to life with functional stats, evocative descriptions, and full-color artwork. And because you can find all this information on each creature card, your Creatures of the Galaxy Adversary Deck can save you valuable time that you might have spent thumbing through your rulebooks while your characters were trekking through the wilds of alien worlds.