User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-101.160.191.17-20120522085708/@comment-5124253-20120525141854

also cas's comment that "there's a reason my father locked them in purgatory. They're the piranha that would eat the whole aquarium" emphasises the fact they can kill angels so there is evidence to prove that leviathan beats angel.