In other words, the current nascent soul is actually Shuhang's true self while his physical body now became only a mere container. In a sense, Shuhang is already truly 'immortal'. The impenetrable part wasn't actually just a saying either, but a fact. At least it's supposed to be. Despite that however... How in the world is Ophis just casually shoving her hand in his supposed 'impenetrable' soul defense? As expected of one of the strongest being in existence and is comparable to the Holder of the Heavens Mandate... How scary.