User blog comment:MisterRandom2/Can an Angel Blade kill a demon?/@comment-5188979-20120612185906

I agree with the good General.

Michael's the 3rd most powerful being in Creation and even he's not completely immune to Holy Fire -- something the weakest Black-Eyed Demon could shrug off. Now, with that said, it can't kill a Demon. Especially if we're talking about the upper echelon.