User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-184.77.255.73-20111218034813/@comment-76.212.200.203-20111218063838

The Leviathans should be considered an exception as well, ImperiexSeed. There has been no discussion within the series whether archangels or the Leviathans are more powerful than other, so we can only speculate. As far as we know the Leviathans could at least be on par with the archangels if not more powerful, so both could presumably destroy each other.