User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-109.157.135.195-20111230181038/@comment-63.117.245.61-20111230205551

Shows like Supernatural are always inconsistent. Death isn't fully infallible. He claims that a soul can never be destroyed, yet demons are killed consistently. Demons are just twisted evil souls. They can be annihilated by Ruby's knife or the Colt.

It's highly unlikely that the Leviathans are older than Michael and Lucifer. These two are God's most precious and closest to God. They resemble him in every way on a lesser level. And after them are Raphael and Gabriele. Michael is the viceroy of God and Lucifer is God's most cherished favorate. The Leviathans are one of God's first rejects. His first failed experiments gone wrong. These Leviathans were among God's beta tests. Instead of killing them, he locked them away because of their degenerate flaws. They're not cosmic or magical. They're nothing more than a bunch of primordial creatures with primal powers and abilities.