root said:"Well caidin...Can I call you caidin? Well, anyway, I was rocking out with my bros, right. Oh, btw, Ciaphas Cain is alive and well. Anyway, as I said, i was rocking out with my bros and then some callidus assassin WHICH I KNOW YOU SENT YOU BITCH tried to off me. So I whacked her. What could I do? Actually some black dude whacked her. Probably raped her, too. But who cares. Anyway, this black dude gives me a ring, right? So I got a mild case of plot stupidity and slipped it on. Turns out the ring contains the souls of millions of not-so-dead necrontyr, beats me why. Not sure what they want, yet, but i gibbed some foo's and ate their brains. I was doing a kindness, i mean, let's face it Caidin, grimdark is a shitty place to live. Maybe now they can rock out with Slaanesh or whatever.
Also did I mention this black dude was a c'tan? Oh yeah, deceiver. P. cool guy, I guess, apart from the cannibal ring he gave me. He wants me to help him...do some vague stuff, something to do with the LSD star that's been going around. Also, Tzeentch recruited me. Can't say I like him much, but that bum deceiver has been sitting on his ass doing fuck all while I have to deal with this civil war. Oh, and this civil war? Let's say a genestealer tried to kill me before it started. funnily enough, he was one of the malfian top brass. What was my point? Oh yeah. I'm in deep shit, Caidin. Real deep shit. So I figure, it's either make or break it right now, and you're a swell guy. Also I gave them mutants their freedom but hey, they're just mutants, it's not like they're some horrible catastrophe waiting to happen. Anyway, I need the men, right?
Then There's this weird dude Eliphas wandering around doing shit, I gotta stop him...Well, I think I had to, but now that i'm tzeentch's buddy maybe I'm supposed to help him. I dunno. Tzeentch claims Deceiver wants to make some kind of powergrab at godhood, total bollocks if you ask me, the only true god is the emperor may he stay dead for ten thousand years. Oh shit, did I just said that? Well, he was an awfully overbearing old bugger. Anyway, Deceiver claims Tzeentch's gonna put Magnus the Red on the throne if we don't stop him. Y'know Magnus? Tall guy...red skin. Only one eye. Also a daemon. So what the fuck, right? I can't figure this shit out by myself. Besides, the cannibal ring i'm wearing speaks that there's some kind of dragon or wahtever going to terra and intent on skullfucking us all. So yeah."
That would be Marius' dialogue if he was dosed with lots of lucid water.
this has no authenticity whatsoever but I felt like letting of some steam so there you have it, cutesy grimdark.
This. This is my vote.