The demons of the Fade are jealous of the world they sense from across the Veil. They constantly push against the boundaries of the Fade, and when they finally cross over, they attempt to possess the first living creature they see. They are unable, however, to distinguish that which was once living from that which still is... in fact, a corpse provides an even more tempting target to a weaker demon as it has no will with which to resist the possession. The demon cannot rationalize why this is so; it only sees a target and grasps at the opportunity.