This is something I have long suspected as it seems like if Dean were somehow in true danger to the point that he were to die (in an episode that is tied to Amara, I know he almost did in the crappy werewolf episode but let's be honest, noone thought he was actually going to die and if you did then go to bed. :-p) that she would step in and save him and we know as it is that he cannot in good conscience or of free will take a shot at her. I am wondering if he is somehow the key to whether she lives or dies.

Just a spare thought I didn't really have a relevant topic to mull over it in,