User blog comment:ImperiexSeed/Supernatural Mysteries/@comment-3481504-20120312215145/@comment-4920092-20120312225755

That's hard to answer without knowing exactly how the spell worked. Did it transport them to a new reality? Or did it fabricate one? If it really was another reality, it seems likely that even the Abrahamic God or Death would have had power IN the reality (though an Archangel had the power to bring characters BACK, so it seems likely God and Death could have done the same). But, if it was fabricated, I'm fairly confident more powerful entities could have breached it.