A setting where our comfy material world is just the tip of an iceberg, the very top layer of many; our puny human senses are simply not trained to perceive the rest of them. With certain magical rituals, you can move down into deeper layers... but there are things down there you might not wanna meet.
In a Layered World, several dimensions coexist in space and time. When you move onto deeper [...] [tvtropes.org]