Every region in a campaign world has its handful of crazed killers and other evil creatures whose only joy in life is to inflict fear and death on others. When these creatures are eventually hunted down and slain (commonly by brave adventurers), not all of their souls descend into the realm of the damned. The forces in charge of the hells decide to wad many of these murdering, irredeemable spirits together and then send them back onto the Material Plane as one creature—a ghostly slasher—to continue their evil work.