A pantheon will have a mythology, whether it’s featured heavily in stories or just mentioned by characters or in narration. To avoid exposition, incorporating the myths into a tale is the best way to mention them. This is one area we can stall on inventing, but creation myths and end-of-world myths are among the most important to work out; minor myths can be invented when needed. Even if our world doesn’t have gods, these myths will exist, as our awareness of our own mortality has us contemplating the birth and death of everything, not just ourselves. Any story about incidents among the gods, or between gods and their species, can also become a myth people either believe or not.
This section of chapter 2, “Creating Gods,” from Creating Life, discusses how to invent creation myths and using Earth analogues to do so.