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GameMastery Guide / Creating a World / The Planes

The Purpose of Planes

Source GameMastery Guide pg. 166
If you’re pouring all your efforts into developing a vibrant, self-contained world for your campaign setting, why should you bother introducing planes at all? The simplest answer is that many rules systems expect you to. Monsters like devils and angels—and in fact, all creatures of the “outsider” type in the Pathfinder Roleplaying Game—are presumed to stem from different planes than the PCs, often ones tied to specific alignments. In addition, it can be difficult to challenge high-level PCs within the boundaries of the same world that housed their low-level adventures. By having your players travel to other planes, you gain the opportunity to reinvent the natural laws of the setting and introduce both creatures and characters powerful enough to keep the PCs on their toes. Most importantly, however, planes fill out your world and help to answer the biggest of spiritual questions.

Archives of Nethys

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The Purpose of Planes