A Fictional World

Deciding that if it went to the human world, it's fun would more than likely be stopped by either laws of physics or God not wanting it to cause problems to the mortals (Or maybe even both), so it had a simple idea, it would just use it's powers to create a mini dimmension that it could just go in and out at will, it even decided that just for fun, it would use one of the different human fiction works to make this world, it now only had to decide which one it would use, those Harry Potter books universe?, The Star wars universe?, one of those japanese anime universes?, it just had to decide what to create