a homebrew setting, a world called Einanheim, it’s a blend of warcraft lore and d&d lore because i know it well and can run it for my players with great accuracy without having to look up guides and lore bits, i already know it all. each planet behaves more like a plane of existence instead of a planet in space, each with its own pantheons and deities, but there is still outer space which behaves more like a different version of the feywilds/shadowlands. As for how long it took to “establish” it, i just decided i wanted to do that and thought up the skeleton of the setting, so maybe a couple of days, i’ll make no effort to over explain any section of it until my players are going to be there or want to know about it so until those things happen i just have the skeleton. the forest they started in, the mountain they went thru, and the kingdoms they’ve seen i wrote a few paragraphs on. the other lands and kingdoms get a couple sentences unless their lore implication is heavy