User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-75.190.143.112-20140805051348

Allow me to propose something. Recall when Castiel has millions of souls in him? He was capable of holding back all of the levathans for a decent amount of time. Now despite that fact he weilded this power, he still feared lucifer and Micheal escaping and stopping him. My guess is that together micheal and luci can stalemeate the leviathans.