Religious mythos

Can I create a world without religion?
Don’t do it. While this is arguable, I agree with the panelists who said a world without religion isn’t plausible. Humans, highly evolved as we are, are always going to seek out something greater than ourselves. Religion gives us moral identity and explains what we do not understand. It’s a sense of community.

Note that science can be regarded as a religion, one with a belief in evidence and a commitment to discovering truth. In modern society, a betrayal of the core principles of science is regarded with the same outrage as blasphemy.

''Tip: It’s unrealistic to assume a large group of people would intentionally worship evil—rather, they would be led into it by believing they are doing the right thing, and/or through circumstances that drive them to that behaviour. If you want to create a culture that worships evil, research notorious cults.''

The red sun
All planes share three suns: one bright, one blue, one red. The red sun is always hidden and no astrologist can accurately predict how frequently it will rise. However on nights when the blue sun becomes faint, the Red Sun is expected to rise on the next day. It is widely believe that the White walk the lands on that night, hence why no person will be willingly moving about on the night of the Red Sun. People who have been outside on those nights have been found invariably changed: blabbering wrecks unable to recall their names or will to live, gone mad from the experience.

In some cultures, the highest degree of punishment is to be branded a "forgotten". This implies that no one in the world is allowed to provide you with shelter of any sort, and is mandated to chase you from any shelter you may find. The end result is that most forgotten find themselves exposed to the elements on the night of a Red Sun, and this sentence is considered worse than death.

Obscure legends claim that only the White or their Agents can walk unharmed under a Red Sun. Human legends claim that the Savior of Man, the one who will return mankind to its former glory, will be one who can walk under the Red Sun. Elven legends show similar beliefs, and the same goes for faes and draconians.

Funnily enough, several people in the setting HAVE survived under a Red Sun. Then again, those people cannot truly be considered normal. So something IS up when a Red Sun comes, but it does not affect everyone the same way...