User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-80.202.134.182-20120514021238/@comment-4920092-20120514143546

This is the least true thing I've ever seen on this wikia. I gotta second ImperiexSeed and say "pft, nonsense."

Death doesn't serve Lucifer - in fact, he helped Dean so he could be free of Lucifer. He views Lucifer as "a spoiled child throwing a temper tantrum."

Leviathans won't serve Lucifer - he wants to eradicate humanity, while the Leviathans want to control and breed them as a food source.

And frankly, Leviathans don't have the kind of power necessary to free Lucifer. The only way they could is using the Horsemen's rings, and now that Death has his, there is no way for them to get all 4. Edgar might be able to kill a few angels, but he wouldn't dare try and fight Death.