(I will be refining this idea over the next week or two)
So what I was thinking was having two parallel realms, one dark (eternal night), one light (eternal day). In each all creatures can use varied levels of magic. The light is ruled by a king, and the dark a queen. The two realms may not coexist as one world, or it would collapse into oblivion. The catch is that only the queen knows this. And the king has set out to collect a a pair of ritualistic tomes, one hidden in each realm, that would, in theory, allow him to combine the two realms.
The path between the two is called the Gate of Sacrifice. To cross into the opposite realm one must give up something crucial to them (such as one of the five senses or their magical prowess), that will not be returned until returning to their own world.
Obviously only nocturnal creatures in the dark realm and vice versa. For example, dwarves and humans would not be found in the dark realm, but elves and nekos can.
For character species I am willing to be lenient for you creative people, as long as their home realm makes sense.
Magic elements for the light realm: Wind, metal, ice, light, electric
Magic elements for the dark realm: earth, water, fire, shadow, forest
If anyone has any questions, feel free to ask. I really want this to work, as it will be inspiration for my novel.
I'd prefer anyone interested to be able to post at least 2-4 decent paragraphs, but once again, I am lenient. Just no one liners.
Thanks for taking the time to look over my idea, and I also thank everyone in advance for any ideas you may provide me with!