Pass the Death

To some, it looks like a normal, innocuous, black pebble. It has been smoothed and shined over the years of hiding out in people's pockets, making its surface almost reflective. All the better to see the undead stalking you from behind. Because this stone isn't a normal stone. It is the death stone, and you're just as likely to die from seeing it as from the undead that stalk the world. No one knows where the death stone came from, or how long it's been creating the undead that have ravaged...