User blog comment:Tommy,Klaus&Kol2012+/How to Kill a Levithan/@comment-3481504-20120225175225/@comment-3045936-20120225192317

Not so much too do with the theory but Bobby said that the Ash of a Phoenix can burn the mother. That means that while very rare there could be others. But seeing as it was the weapon of choice against Eve a Season 6 monster I doubt we will see another one.