[breuleux]

In Greek cosmogony (well, one version of it) there is one supreme being called Chaos from which everything else proceeded. If you think of it simply as a being of pure creative energy that created the laws of physics at random (and possibly infinitely many other random universes we have no access to), would that fit the bill?

It's little more than a reification of "just because" as an actual being, but I mean, why not.