User blog comment:Tommy,Klaus&Kol2012+/How to Kill a Levithan/@comment-1149992-20120228224928

I'd say the colt may work. Castiel was/is a relatively young angel, which is why he didn't know about the dangers of releasing the Leviathans from Purgatory. Lucifer however was much older, and he out and said only 5 beings in all creation couldn't be killed by the colt. All of creation includes the Leviathans, as Death out and said they were directly created by God. Death may be of help to the boys. He was majorly pissed that they bound him, but I wouldn't say he doesn't care about the Leviathans. He actively helped the boys try and return them to Purgatory. However, it's highly unlikely he would give up his Scythe, as it is perhaps the only weapon that can kill him. The reason the borax worked on LeviathanSam and LeviathanDean so well was because it caused so much physical damage that they couldn't heal from it. But borax was unique in the amount of damage it caused, so I don't think the brothers could recreate that much damage. Besides, Dick was almost completely immune to Borax. On the subject on the Angels, we honestly have no idea how many are still alive. Castiel killed all of Raphael's forces, and two of his own commanders, so my guess is that heaven's forces are pretty small right now. However, we haven't seen the Leviathan's do magic to attack yet. All they do is shapeshift, punch things, and eat things. The angels use magic in their attacks, and it has been shown that the Leviathans are vulnerable to magic. Crowley's position in Hell wasn't stable at the end of Season 6, so he's probably been dealing with small rebellions of his own and keeping all those souls waiting in line. I think he's seriously scared of the big mouths, and doesn't want to piss them off, so that is why he's letting Sam and Dean handle them.