Mars is the fourth planet in the solar system, and linked to the Shade Realm of Forces. Mars was once inhabited, and thus has a Penumbra, where one can easily the ruins of of canals running along old ley lines. Even in the Penumbra, however, the air is thin and severe dust storms are a hazard. A small defensive installation is located on Mars' smaller moon, Phobos, to prevent Technocracy infiltration.