I'm really worried about both, but currently we're only seeing how the mark is changing Dean and UGH. I do not like it. Now that he's killed Abaddon, I hope they find a way to get rid of it. But I am also really worried about Cas, especially considering that Misha flat out told us that the stolen grace would end up affecting Cas negatively. I just really hope it's not some sort of end-of-S6/beginning-of-S7 repeat. Please no.

I love the Mark of Cain storyline. I've long been waiting for Dean's darker side to take center stage and thus far I have not been disappointed. That being said, I of course would like to see Dean pulled back to himself eventually.

Honestly, I'm not very invested in Cas's storyline this season. It started out great but now it's kind of fizzled for me and become somewhat boring.

I care about Cas more than anyone else on this show.

This was hard to choose lol I love cas but I don't think they'll kill him off or anything. I've read RUMORS about dean leaving the show so i'm more worried about him for right now. I heard dean wanted to do something with DC comics or something. read it awhile ago and heard he turned down the role for Hawkeye in Avengers. will he turn down...idk if I should call them "bigger roles" or not. haha but it was a pretty major decision. (these are just things I read on the internet, which doesn't mean its true.)