And that's the point where you go and play planescape: torment or read D&D books.DaftyXIII,Feb 15 2017 wrote: EDIT : I dont know the setting all that well honsetly, thus i dont understand fuly why the setting has anything to do with outsiders late game. but...
It is not a matter of "past lore".
There's a whole cosmology. Prime worlds (like toril), and many planes that lie outside of them. The planes (or worlds) can be related to an element, a fundamental force (like law, chaos, evil, good, life death - those are fundamental forces), or lie somewhere inbetween.
Related (3.5) D&D books would be manual of the planes, Fiendish Codex I and Fiendish Codex II. There are many others.
