Signs of the Apocalypse
Great and terrible events often portend the coming of an apocalypse. These portents manifest as a sign: the physical, magical, and/or psychological imprint of the world-shattering change or destruction that is approaching. A sign reflects an aspect of the nature or purpose of the apocalypse, and its influences become ongoing and effect the entire campaign setting. Sometimes it appears not as a by-product of the coming apocalypse, but as a warning from the gods, who are often constrained from direct involvement.