Publisher's blurb: A menace from beyond the stars... This set of 12 double-sided terrain cards (plus 2 bonus cards inside the covers) presents all of the elements you need to create countless variations of bio-organic spacefaring entities. Mix and match the tiles to map out your own living spaceships, hive-like organic tunnels, or even the digestive system of an enormous creature. Each card measures 5 by 8 inches, and is printed on thick glossy cover stock. The printed set is gathered in a clear resealable envelope for safe and easy transportation.