User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-184.77.255.73-20120506183558/@comment-4920673-20120508061016

I think you're completely wrong. Death & God existed at the same time, from what Death has mentioned. They're more like yin/yang. One is a creator of life, the other ends life.

Castiel wasn't really "god" either. He was mutated due to absorbing souls, much like the ghost that absorbed souls was mutated in power. Any "spirit" being can absorb other spirits/souls, based on what we've seen in the show. Along with Castiel becoming a seraphim, the souls boosted his power. He never once was a god. Think of him as turning super saiyan.

Jesse Turner was powerful, but he was still mortal. He was born of a demon and human. That hybrid made him powerful, but there's nothing so far that states he was immortal or unkillable. It would just be very difficult to kill him without manipulation of some sort.

Crowley is still a demon. Demons are twisten human souls. Leviathan are much, much older. In fact, it sounds like, based on Supernatural's lore, that they are very close to the same age as Death and God. The show has stated so far that Age = Power. Jesse was young, therefore I wouldn't put quite as much stock into his power. I would put his power just above archangels, but just below Eve. And Crowley would be eaten in less than 2 seconds, if Dick actually deemed him worth it. But he calls him a bottom feeder. It sounds more like Crowley's dung at best.