User blog comment:Rafe Adler/"Stuck in the Middle (With You)" Discussion/@comment-1031724-20170217183659/@comment-3045936-20170217185953

Darkness God Death Michael Lucifer.

I think these are the five things the colt can't kill.

Raphael and Gabriel still have power far greater than any single lower ranked angel even of the Seraphim. But logic stands a man made weapon, couldn't hurt Amara, Death, or God. If Lucifer is immuned to the colt than Michael should be, as he is the older brother and was stated to be Heaven's mightiest Angel ever created. As it was believed he could kill Lucifer in the end of their battle.