Thinking About The MOC Thing....

I've been pretty affected by the storyline this season. Yes we cured Dean and that was wonderful. But he's still under the affect of the Mark of Cain. There are so many worrisome things to ponder here. First, I thought I understood it was the mark that kept him alive. If it goes do we have to then face another Dean death because after last year I don't know if I can stand it....I really don't. Poor baby he's so upset, afraid really and yet still so brave, just like he always is. The mark does some bad shit to him. All that rage. The second thing I'm wondering about is where the hell did Cain go? And if he transferred the mark to Dean, does he still have it as well? If not, how is he still alive? He still had it on his arm as best as I could tell but did the power go on to Dean? Also, third question, "the river ends at the source" Is that CAIN? Or as Cain implied Lucifer? Or as the Bible says God aka as Chuck in Winchester world? This has actually kept m awake. Probably because I live more in Winchester world than I should..sigh....All this being said, my sweet potato has a hard row to hoe ahead it looks like. I am worrried. Again. But that's Supernatural right? Sam I am trusting you little brother. You have to be the hero here. Because mine can't right now.