No, but it is going to change his mood and make him more aggressive.
It's doubtful, since Cain wasn't a demon.
Actually it did make dean a demon, an asshole one too
I don't think so, but it will certainly have some negative effect on him. I guess we'll just have to wait and find out.
i know it hasnt shown it yet but did giving the mark of cain to dean make dean a demon ?
