User blog comment:Hallichester/The Piece of Clay/@comment-4920092-20120430140305

The first one seems entirely far-fetched, and IF Adam existed, it would have to be in Judeo/Christian lore. According to that lore, by the time Adam was banished from the Garden, it would be entirely too late. As soon as he sinned, diseases were created.

I agree on the second one. And obviously Dick dug it up to have it destroyed.....or possibly decrypted first, so he could gather anything that could kill him, and then destroy it all. And even if he had never dug at all, it seems likely that the Angels could know of its existence...or the new prophet would be told where to find it. After all, Leviathans are an affront to Heaven - they were locked away for a reason. The appearance of a new prophet seems to indicate that Heaven is finally ready to start eradicating them.

Third option - the clay has an incantation or something that can exorcise Leviathans (they are, after all, possessing hosts)....possibly even send them back to purgatory.