User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-4393153-20120517202306/@comment-76.212.193.29-20120518035257

No offense, but that is more than just an opinion, ImperiexSeed. Since "Meet the New Boss", it has never been acknowledged nor implied which of species is more powerful. In fact, the closest we come to such an answer is when Castiel stated the Leviathans can kill angels in "There Will Be Blood, based on whether he meant angels overall or by type. Based on my own understanding, I am inclined the Leviathans > Archangels does indeed make sense.