I’ve been playing around with the idea of multiple planes in my worlds Iris and Iron, inspired by both D&D and Warhammer.
Basically, here’s how my planes work (for now, I’m still workshopping it). There are 3 planes, Terra, Somna, and Patha.
Terra, the Plane of Earth, is where all the shit happens. All the wars, all the farming, all the people. Basically, it is the normal place, it is the plane of action.
Somna, the Plane of Sleep, is where all thought coalesces. You have an idea, it’s somewhere in Somna, might not be super powerful or tangible cause you’re just one person, but its somewhere. Faith takes root here too. Celestial creatures are born here from the faith of the religion that spawned them.
Patha, the Plane of Magic, is where emotion reigns supreme. Much like the Warp in Warhammer, emotion takes its form here. This is where your elementals and your demons and other spirits first form.
These 3 planes aren’t like, separate worlds, they’re all the same world in essence. Terra is like the body of the world. Somna is like the mind of the world. And Patha is like the soul of the world.
At least that’s how it is in Iris. Iron doesn’t have Somna or Patha. Patha sprung a leak from Iris into Fate’s next world over, Iron. This caused Iron to start growing its own Patha, and more slowly, it’s own Somna. Now this caused all the monsters and magic and shit to start appearing in Iron. And it’s only gonna get worse (or better, depends on how you look at it). Because as Iron’s Patha grows, magic (the Rot as they call it) spreads and becomes more potent until eventually, it’ll equalise and be just as magically potent as Iris.
This process is only expedited due to the worldwide war(s) in Iron. Tensions are high, emotions are high, which just build Patha faster. And as Patha gets built, it makes a staging ground for Somna to grow.
Who knows, sometime soon, the gods might return.