Give me names
Why were immortals so much more powerful than mortals? It was not just because it was, obviously, a higher realm in cultivation. Immortals were a higher form of existence.
For someone following the normal route of progressing, reaching the Nascent realm made them barely strong enough to just detect the laws of the universe vaguely. It was mere detection, not interaction or manipulation. It was, instead, when they became immortals that their bodies and souls would be strengthened enough to tolerate the burden of touching upon laws, and their tenets could act as anchors to keep them from being swept away when they touched the laws in any way.