Orpheus

Orpheus, colloquially known as the "World of Dreams," is a universe in the multiverse. Orpheus's world has no sun, so it is a world of constant night. It is unique in that, in the dark, people's thoughts, dreams, imaginations, and fears are manifested into reality. This is where monsters come from on Orpheus -- nightmares and thoughts of danger can manifest as monsters literally appearing out of thin air to randomly battle you. However, it is also where magic comes from -- with enough focus, a person can make anything they can imagine or dream up come true.

Since dreams only come true in the dark, civilizations on Orpheus build towns called Havens which use artificial phosphorescent lights to flood the entire area in light so that monsters cannot spawn, allowing people to sleep and think peacefully. However, this also prevents magic or any other supernatural abilities from functioning within the Haven.