I base my cosmology loosely on Norse mythology with non-human gods pulled from various sources, mostly Greyhawk. In addition, I threw in a bit of Celtic mythology with the Archfey that live in Alfheim, repurposed a couple of worlds and voila. Yggdrassil, the tree of life connects all 9 worlds. I tried to stay true to the spirit of the mythology, but several things are modified. I'm not too worried about it because we only have tiny, tiny scraps of the real mythology and even that is from somewhat unreliable narrators.
In any case, we have 3 levels.
The first level:
- Asgard, world of the Aesir
- Alfheim, land of the Sidhe (feywild)
- Dwarfheim, Land of the dwarven deities
- Vanaheim, land of the Vanir (Elven Deities)
The second level:
- Midgard, Mortal Realm (middle world/garden)
The third level:
- Jotunheim, Land of the giants (Jotuns) and fiends (devils/demons)
- Svartalfheim, Land of the drow, the underdark
- Helheim, Realm of the dead
- Niflheim (shadowfell), World of the dead, shadow and dreams.
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The gods of the elves became the Vanir who long ago made war with the Aesir, gods of the humans. Frey and Freya are Vanir, and frequently worshipped by half elves. Since dwarves and dark elves are quite muddled in what little record we have I just repurposed Muspleheim (moved it to Jotunheim) for the dwarves and created Dwarfheim for the dwarven gods. Alfheim is basically the feywild, the Nifleheim is the Shadowfell.
Some of the legends have been tweaked as well. Moradin created Thor's hammer Mjollner and Odin's spear Gungnir. Garl Glittergold wove Sif's hair because even a gnome knows a practical joke can go so far.
So, no great wheel. No plane of air or fire which I always thought was a bit goofy. If you really, really want more detail you can always go to my wiki pages I've built over the years in Obsidian Portal:
Thraes Mythology. It is, and probably always will be a work in progress. I don't really expect people to read it all, it's more of a reference for me.
P.S. I promised the link to
@Matrix Sorcica long ago in a thread far far away. Sorry I kind of forgot about it!