User blog comment:Egyptian Hybrid/What happened to the other Leviathan?/@comment-1975828-20170419053500

Didn't the writers imply that Crowley cleared up the mess? Crowley did that last time with the Jefferson Starships, he went about "cleaning up" what Eve did. Also, I hate to think the Bone is the only thing that can kill them. Archangels are heavily implied to be older. How do Leviathans have only one real weakness?

And wasn't Kevin with him along with the tablet? They could've found another weakness.