So I’ve been sitting on this idea because I thought I might use it for DCBB, but it’s definitely going to be WAY TOO LONG and there’s no way. I’m not sure I’ll ever write it because it’s dark, and y’all know I’m incapable of anything truly dark. So now I’m gonna share :D
Basically a reboot of the entire series, starting at season 1, but instead of looking for the Colt to kill Yellow Eyes, John is looking for the First Blade. Stuff happens, they find it, turns out it doesn’t work, oops John dies. Azazel is still on the loose, and wants to recruit Sammy as his Boy King of Hell to lead all the demons against humanity.
And Dean is like fuck that noise, you know, like he does, and he decides to find a way to make the First Blade work. Along comes Crowley, because he’s a salesman Azazel’s plans are going to fuck up his job. He introduces Dean to Cain.
Dean has to prove himself to Cain, queue hot fight scene with Dean and demons a la season 9, but Dean’s just that cool and didn’t have to go through Purgatory because I’m skipping the whole Leviathan thing. Anyway Cain’s like good job, kiddo, you can have the mark, but in order to pass it to Dean they have to fuck. Y’know like Sam was going to have to sleep with Lillith for their deal.
Hells yeah, hot and explicit scene of Cain fucking Dean, and popping his gay cherry because Dean’s thought about it, but never done it. Oh and he has to come in order for the deal to seal.
(ngl, I really want to write this scene just for funsies)
So Dean gets to experience the joy of gay sex, and also ends up with the Mark of Cain. Off he goes to destroy Azazel and all his minions. Only every time he kills with the First Blade it digs its tendrils into him deeper and deeper, and he’s starting to get scary (think post-demon!dean). And he tries to assuage it with hunting, but he’s having a harder and harder time resisting the urge to just stab anyone that annoys him.
Even Sam, because his sad/worried puppydog eyes are starting to get on Dean’s nerves, and that’s a BAD sign.
And he decides he’s becoming to dangerous, so he tries to off himself. But oops, he comes back as a demon.
And now Heaven’s like OH NO NEW MURDER DEMON, and even though they didn’t really care about Azazel and his army of black floofs, Demon!Dean with the MoC is apocalyptically dangerous. So they start sending angels after him.
And Castiel is the first angel to meet Dean, and he’s supposed to stab him off to perdition, but somehow despite his demonic soul, Castiel is fascinated and hesitates too long.
And Dean doesn’t kill the angel because he’s like oh look, new playmate and starts a game of cat and mouse with Castiel. He kills any other angels that he comes across, and he keeps threatening to kill Castiel (see ya later, Cas. I’ll probably kill you the next time I see you) but he never does. He’s not sure why, but Cas is just so much fun to fuck with.
Cas and Sam team up to try and catch Dean to cure him, and they eventually do. And while they’re pumping him full of purified blood, Dean is talking to them. Telling Sam about how he’s taking over Hell so that Sam won’t have to be the Boy King, and telling Castiel about how Dean only kills people who deserve it.
And Castiel asks him how he thinks he has the right to be judge/jury/executioner when only God should be allowed to judge. And Dean’s like well God ain’t around, is He? and he’s right, and Castiel’s faith in Heaven starts to waver. And that’s just the crack in the chassis that Dean was looking for. Dean starts to really fuck with his head, and before the purification ritual is done, he talks Castiel into letting him go.
Castiel talks him out of trying to kill Sam. You did this to protect him, remember? and Dean’s like ugh, fine, let’s go kill some vermin.
And he drags Castiel all over the world, killing monsters and bad people, and demons that don’t toe his line. Dean let’s Crowley be in charge of the crossroads stuff because he doesn’t give a fuck about it. Then he and Castiel together start fighting the Big Bad demons together until there’s no one left to challenge Dean for the throne in Hell.
Dean takes the throne, with Castiel as his half-fallen angel consort.
And basically they live as immortal murder husbands, with Dean corrupting Castiel to the point where he allows Dean to kill those who deserve it. But Castiel keeping Dean sane enough that he doesn’t try to murder the whole world.
I want it.
I don’t want to write it.
Well except the sex between Cain and Dean. That’d be fun to write :D