User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-77.103.230.159-20120512163755

Can i just point out that the show almost confirmed that Eve was a leviathan or she was atleast created from them... The Apha Vampire reminded Edgar with "I come from you" and he went on to remind him that he (The apha) was a child of Eve. Thats when Edgar started insulting Eve and calling her a whore.

Eve could cut off Castiel power easily and i generally think a Leviathan could either cut off a Arch-Angels power or limit it enough to over power it.