User blog comment:Vitorriq/who created the pagan gods/@comment-2.40.249.133-20120220182238/@comment-3481504-20120221170649

I honestly don't find my comments to be speculation, it's merely a difference in perspective. However, through severe contemplation, I've come to a different conclusion.

Fate clearly implicated that Cas could kill her, but it would instigate her Two Sisters, who are apparently way more powerful than her, which means the blade wasn't needed. Though, Kali seems to be one of the few exceptions, however. Her being able to bind Archangel Gabriel, makes her more powerful than average angels. Thanks for you time.