Rowan was experimenting with the ability of his Time Vault, and the target he had set when he had launched that attack was not the un-life inside the bodies of these gods, that would have been a rather useless move because these creatures were truly immortal and even if he accelerated the time in their bodies a million times over, it lacked any meaning, their flesh would remain potent, fueled by their Calamity Aura, and for beings at their level, they could survive for countless eternities on a slight bit of power, and so it was their Aura that became his target for it was their greatest weakness.