Planar Chaos
Today I'll start with a tautology: a story which takes place in a fantasy world will take place in that fantasy world. Now, let me amend it slightly: a story which takes place in a fantasy world does not take place in some other world. The point I'm so clumsily shambling toward (with an improbable overuse of colons) is this: why would a story — especially a fantasy story where the author already got to tailor-make the setting — need more than one world? If you've never stumbled into the tiny handful of fantasy stories that involve more than one world, you might not even know what I'm talking about. Usually, "the world" is a big enough setting to handle a story. Even in the works of Tolkien, in which the world of "Middle Earth" has that name for a reason, the additional realities are mostly unseen history that you don't even need to know about in order to understand what's going on in the primary narratives (four whole books' worth...