User blog comment:Noctosphere/A demon I've heard about/@comment-1975828-20160906042217/@comment-29408332-20160908011813

I agree with this point. I wonder what is to come in season 12, though. What new methods would they introduce to kill Amon? The bone of an angel soaked in the blood of the kraken? (That's a joke, obviously.)

It is said that Azazel was once an angel (because of the -el), and Lucifer corrupted him into a demon. But, this doesn't seem logical as Castiel angels have no souls. Or, it could be a plot hole, and angels do have souls. If Azazel was once an angel, it would explain why holy water didn't work on him.

Other stories say Azazel is the first demon Lucifer created out of nothing. He was born a demon, not a human.