User blog comment:EmpyreanSmoke/Supernatural Q&A/@comment-27006668-20151002194202/@comment-24834479-20151003194632

First off SeraphLucifer, I asked for people to not answer others questions, so please don't.

1. Their grace was specifically made for them, and was designed for their angelic spirit. Other angels' grace weren't meant for them, and so it starts to wear out by the angel using it wrongly.

2. It was called the mark of Cain because that is who almost everybody thinks it originated with.

3. Lower level demons, most likely.

4. Depends on what their strength level is.

5. If he didn't help in the war, it was mostl likely because he didn't want to mess with the natural order, and remained neutral.

6. Yes.

7. Michael with the mark and blade.

8. Yes.

9. Cain killed regular demons with his bare hands, not the Knights.

10. Most likely Australia.

11. God had Lucifer cast out because the mark had corrupted him into being jealous of humans.

12. Angels are very much hypocrites. The reason they didn't follow lucifer was because they were loyal to their father.