User blog comment:MisterRandom2/Can an Angel Blade kill a demon?/@comment-3481504-20120606032600

Well, has to possess the power capacity, being able to kill Angels, Seraphs (as they seemingly don't carry their own blade), etc.

Personally, I find it reasonably necessary to assume it can, but....let's wait (by wait, mean not add/remove anything) for other opinions.