Excerpted from The World of the Wilderlands of High Adventure:

Luna, is the largest of the moons, appearing from the surface to be the same size as Earth’s moon and at the same distance, and is a silvery-white color, pockmarked by grayish-blue seas and craters. Various cultures hold that different creatures can be seen in the patterns of craters and seas. Luna is in synchronous rotation with Gaia, eternally presenting the same face to its mother world during its 28-day revolution. It is the only moon of any importance to lycanthropes and, coincidentally enough, the only of the three moons to appear in the Shadowlands. It is also of great importance to witches, whose powers wax and wane with the phases of Luna. Luna is held to be of importance to, controlled by, or the embodiment of various gods, including Alinah, Artemis, Nanna, Kuvartma, Nephtlys, Rhiannon, Thoth, and Yarikh.