User blog comment:Tommy,Klaus&Kol2012+/How to Kill a Levithan/@comment-168.16.130.206-20120225192401/@comment-168.16.130.206-20120225195402

also, possibly something w/ sam's psychic abilities(that Lucifer pushes him to use). I'm also suspicious that Crowley's limited involvement in many of the demon stories this season is b/c he is off searching for a way to help the brothers defeat the Leviathans to restore the natural balance.