Every dimension in existence exhibits its own laws, laws that set the capabilities and limits of anything that is subjected to its rules. It can be compared to a piece of paper with different laws written on it, like gravity, space, time, light, speed, weight, etc, and being inside this paper (dimension or realm) subjects you to its laws that limits your existence. But this is different to the Dream realm, for naturally, it is a domain with no existing laws. Again, using the paper as an example, the Dream realm can be compared to a blank piece of paper where can write and erase desired laws, concept and creations that they want to create in that realm. Somnium Vacuus which means "Dream Void" is partly the reason behind the essential characteristic of Dreamers that makes them as the boundless beings that they are.