[quote=@Nemeses]
<Snipped quote by Source>

I must not remember what Scales are very well then.
[/quote]

Existence is a Plane, other Planes exist. All of the planes parallel to Existence are collectively known as a Scale. There are Scales "above" and "below" the one with Existence in it. When Dark died some people went to the buffer between Existence and the higher up Scale, and Dark's kids made it to the actual next Scale. 
It's literally impossible to go between Scales, and nobody but Dark and [i]maaaaaybe[/i] Blake and Techi know how to get to other Planes.