You could use the same origin model to slingshot beyond it.

What if there was an origin that had its own open, gravity well dynamics?

Within that origin, you could have a more nuanced way of keeping track of valid compositions.

An alternate law of physics in the pocket universe within the larger universe it's embedded in.

The pocket universe could grow into its own full universe that could come to have more power than the universe it's embedded in.

Think of the galaxy in a marble that's the macguffin in the original Men In Black.