I think this is a reference to either the many-worlds interpretation of quantum mechanics or some brane collision hypothesis if anyone wants to read up.
However, assuming outside these bubbles there are no physical laws as there isn't even an universe for them to be in, I will provide a simpler explanation than SD.
Yes, this is a reference to the many-worlds interpretation
of the universe.
Magic.. ok if that helps with the concept. I prefer to think of the Oracle as a consciousness that exists between the bubbles and does not have corporeal form as we understand it.
The stories of Pendor are about regular people, with this esoteric concept being the foundation of the stage of our conflict. Yet, understanding that overarching stage is not necessary to understand the characters, their motivations and their actions. It merely adds an additional layer of context to a very complex set of stories. Stories about loss, love, redemption, the struggle of survival and the angst of life. They are about small choices that reverberate into much larger events. They are about the blurring the lines of our perceived reality into something that perhaps we, as readers, have not considered before.
But.. this is all in the future.. I am still years away from starting these full time. Between now and that time, I have other projects that require my full attention.