User blog comment:EmpyreanSmoke/Weaknesses/@comment-3045936-20151001223032/@comment-209.239.123.107-20151002010830

No, it wasn't directly stated. The fact that Leviathans were said to be made first means nothing to whether they could kill an angel, or an archangel for that matter. He said angels, but did not specifically refer to archangels, probably because he knew they were dead, or locked away and couldn't do anything to fight the Leviathans. Just because you have a theory that they could, it doesn't mean they can, and should not be listed on the page. If it wasn't specifically stated on the show, it doesn't belong. If something official confirms that you are correct, then it should be added to the page but not before.