Sam and Elizabeth were sat in the library doing research on their respective laptops when Sam's phone rang.
They frowned to each other when they saw it was Castiel.
"Cas?" Sam greeted questioningly.
"Can I just kill him now?" The Angel grumbled through the phone.
"You know I can hear you, right?" Metatron's voice was heard in the background.
"No, we need him alive." Sam sighed. "Look, after he gives you your grace back and gives Elizabeth the information he has on Eden, you can do whatever you want with him."
"Well, I would like to kill him slowly." Cas replied.
"I am like, two feet from you." The scribe protested.
"Anything on the Mark of Cain?" The Angel spoke over Metatron's continued ramblings.
"No. We've been digging for something – for anything, but I don't know, Cas..." Sam told him.
"There is an answer out there." Cas told him. "We will find a cure for Dean."
"I don't know why you'd wanna kill that little firecracker now, he's finally interesti-"
Metatron was cut off by Castiel punching him in the face.
"I think you've been spending a little too much time around us, Pigeon." Elizabeth giggled. "Hi, by the way."
"Yeah, hi." Cas grumbled. "We've just got to keep digging."
"Yeah..." Sam mumbled, hearing Dean heading towards them.
"Say it's me." Elizabeth whispered, quickly closing her laptop before zapping out of there.
"Yeah, uh, alright, well, have fun. Love you too. Bye." Sam stuttered, quickly putting the phone down.
Elizabeth appeared in the back seat of Cas' car.
"Hey, you." She smirked.
Castiel almost crashed the car when he saw her and Metatron jumped out of his skin.
"Elizabeth!" Cas shouted as he put the phone down. "Don't do that!"
"Sorry, Dean came in. Needed to think quick. So, before he saw me, I thought I'd zap here, help you keep the hobo in check and gets some answers of my own." She shrugged.
"You could've given me a damn heart attack!" Metatron shrieked. "I'm mortal now, in case you forgot!"
"No, dickbag, I did not forget. I'm almost disappointed you didn't."
"Likewise." Cas mumbled.
"So, since we've got a road trip to kill, how about you tell me what I need to know." Elizabeth smiled, resting her arms on the backs of their seats.
"How can I guarantee you won't kill me after I tell you?" Metatron grumbled, shrinking in his seat.
"Because Pigeon needs his grace back. Now talk." The Vampire retorted.
"But then he'll kill me after I give it to him."
Cas punched him again, not even bothering to look away from the road to do it. Metatron groaned out in pain as his face connected with the Angel's fist and his head connected with the car window.
"Tell her what she needs to know." Cas growled.
"Alright, alright!" Metatron cried. "God never told me how you got your powers, only that you had them. God was the one who kept you in that cave all those centuries. He took you from the Garden when he realised how useful you'd be. But then you started massacring villages and he realised he had to control you somehow. When that didn't work and you continued to kill and, even worse, escaped, he sent Lucifer to kill you. But Lucifer had been watching you from both Heaven and Hell since the Garden. He loved you. At first it was a caring love, but as you grew up, it turned romantic. And so, he refused. That's part of the reason he was put in the Cage. When he refused, God sent the other kids off to do what he wouldn't. Sure, he was on the verge of it way before that with the whole 'Eve' thing and the snake, but that was God's final straw."
"Lucifer was in love with her?" Castiel frowned.
"How ironic that she ended up falling for his one, true vessel, instead." Metatron smirked. "Coincidence? I don't think so."
Elizabeth sat back in her seat, taking all the information in.
"So, my love for Sam..." She trailed off.
"A little too perfect to be considered anything other than destiny, don't you think?" Metatron cocked a brow as he looked back at her. "Almost like your love isn't real."
Cas punched him again. Harder this time. Blood poured from his mouth and nose.
"That's enough." The Angel snapped.
Elizabeth phone rang in the back pocket of her jeans. Pulling it out, it read 'Impala 2'.
"What's up?" Elizabeth answered.
"You need to get back here. Right now." Sam said.
"Okay. Give me a second." She nodded, despite him being unable to see.
She hung up the phone, slipping it back into her pocket.
"Sorry boys, gotta cut this visit short. Pigeon, if you need me, text me. Otherwise? Elizabeth out." The Vampire disappeared.

"What's happened?" She asked, walking up the small set of stairs to the library.
"So... Rowena is Crowley's mother and Charlie's been shot." Dean summarised.
Elizabeth's brows raised.
"Excuse me?"
"Also, Rowena came to kill me whilst you guys were having your French movie night, but couldn't because of the Mark and she said the Mark was just another curse and that it can be broken." The older brother continued.
"Do we maybe want to prioritise a little bit and go back to the bit where Charlie's been shot?" The Vampire made a winding back motion with her fingers.
"She's found the Book of the Damned. Apparently some guys didn't like that very much and came after her. But she's okay – ish. She's on her way to one of Bobby's old cabins." Sam replied.
"Right, well, let's go then." Elizabeth waved her hands in the direction of the Bunker stairs.

After grabbing everything they needed, they hit the road.
Between Dean's usual playlist and the conversation about a beach vacation after the whole 'Mark of Cain' thing was all over, it didn't take awfully long for them to get there.
The cabin was by a lake – one of the more picturesque places Bobby had acquired, complete with the sounds of ducks quaking on the shoreline.
When they entered the cabin, they'd ended up waking Charlie, who was sat at a table on the other side of the room with a piled of books in front of her and a post-it stuck to her face.
Whilst the boys had the academic and occult things they needed, Elizabeth had a first aid kit.
"Hey." They greeted as Sam closed the door.
"Were you followed?" Charlie asked, giving them a hug each.
"No, no." Dean shook his head.
"How you feeling?" Sam asked.
"Um... I may have just passed out, but better." She gave a breathy chuckle.
"Well, you're in luck. Nurse Elizabeth is here with actual medical supplies and whole bunch of kickass painkillers." The Vampire smirked, holding up the white box in her hands.
"Oh, yes." Charlie breathed.

"Where's the book?" Dean asked as Elizabeth was re-stitching Charlie's gunshot wound to the left side of her stomach.
"On the table." She replied, laying back on the couch. "Here's what I've learned so far; about seven-hundred years ago, a nun locked herself away after having 'visions of darkness'. After a few decades, scrawled away by herself, she emerged with that."
She pointed to the book wrapped in cloth on the table just as Sam picked it up.
As soon as it was unwrapped, the intense, dark feeling Elizabeth had picked up on grew. She swore she heard whispers, but tried to shake it off.
"Each of those pages are made out of slices of her own skin, written in her blood." The girl continued. The boys grimaced. "I told you, it's eekish. According to the notes I found, it's been owned and used by cults, covens, even the Vatican had it for a while. There's a spell inside that thing for everything. We're talking some black mass, dark magic, end-of-times nastiness."
"Right, that should do it." Elizabeth sighed, putting a bandage over Charlie's fresh stitches. "Take these." She handed her some painkillers and a glass of water she'd previously prepared and put on the floor next to the couch.
"Thanks. Didn't think dental floss would hold much longer." Charlie chuckled, downing the pills and the water.
"You're damn lucky, honey, you know that?" Elizabeth cocked a brow, moving to the kitchen area to wash the blood from her hands.
She looked over to Dean, who was slowly flicking through the pages, not even looking at them as he appeared to be in some sort of trance, wandering around the room.
"Dean?" She frowned.
Sam looked over, picking up on it too.
"Dean." He said. "Dean!"
The older brother's face shot up to look at him.
"What?" He asked. He looked around, confused, like he hadn't even noticed he'd been moving. "I don't think it's a good idea that I touch this. I'll go get the rest of our crap."
As he moved over to Charlie and handed it to her, Sam had a face of thought.
As soon as the older brother left the cabin, Charlie turned to them.
"What the Hell was that?" She breathed.
"He's not getting better." Sam explained. "He's trying to cover it but... We need to find that cure, fast." He took the book from Charlie and flicked through a couple of pages. "Hey, 'Liza... Do you think you – or Eden – would recognise any of the symbols in this book?"
Elizabeth dried her hands on a towel and walked over as the brother held out the book to her.
As she walked over, she heard the whispers getting louder. They were all speaking at once – she couldn't make out what they were saying. As soon as Elizabeth's fingers made contact with it, the parts of the book she touched glowed red.
The Vampire pulled back instantly, wincing.
"It bloody burned me!" She hissed, clutching her reddened fingertips.
"What the Hell?" Charlie's eyes widened.
"It's... Not hot." Sam frowned.
"Tell that to my skin!" Elizabeth protested, holding out her hand to reveal the reddened, bordering on blistered skin on the pads of her fingers.
"Holy crap." Charlie gasped as Dean walked back in.
"What's holy crap?" He asked.
"The book freakin' burned me!" The Vampire raised her voice, showing him the damage.
"The Hell?" Dean frowned, placing their things down behind the couch.
"So it makes you weird – probably because of the Mark of Cain..." Sam assessed, gesturing to his brother. "But what's your reasoning?"
"You wanted an Eden thing to happen... Maybe it did." Elizabeth shrugged, moving over to the cooler of blood Dean had brought in. "The book apparently doesn't like me. I've been hearing it whispering ever since you unwrapped it. Like its calling out to me or something."
She leaned down, retrieving a blood bag, but also cooling her fingers down on the inside of the box.
"Whispering?" Sam frowned. "Whispering what?"
Elizabeth shrugged as she sipped from the tube in the blood bag.
"No idea. They're all talking at once. I can't make it out."

After Elizabeth was healed, the four opted to try and find out who was after Charlie.
"I got a pretty good look at his tattoo." The girl started.
"Tattoo?" Elizabeth frowned.
"Yeah, he had one on his wrist – kind of a family crest thing by the looks of things. It's something like this." Charlie replied, handing Dean a piece of paper as he sat down on the couch with one of the Men of Letters boxes in front of him.
It definitely looked family crest-like. It was a two headed eagle facing opposite directions.
"The douche clan." Dean remarked as Elizabeth looked over his shoulder.
"That looks kinda familiar..." The Vampire frowned. "I can't think where I've seen it before though..."
"Well, this is everything the Men of Letters had on occult families, so, there should be something in here that could jog your memory or give us an outright answer." Dean replied.
"Sam, got anything?" Charlie called through the cabin.
"Maybe, uh, yeah. It's all in an obscure Samarian dialect. I actually found a rough match for it in this book." The younger brother replied.
"Great." Charlie nodded.
"I thought so too, but I've been translating and... None of the translated words make any sense. It's all just gibberish." He continued, handing her the book he'd be translating into. "I mean... Maybe it's another, different dialect?
"No, no, no. You're right, but I think... I think this is in code." Charlie told him.
"An entire book of unreadable text that's also in code. Great." He sighed.
"And you call yourselves nerds." Dean commented from the other side of the cabin. "Come on, you got this."
"He's right." Charlie smiled. "Let's get our Alan Turing on – decrypt this bitch."
Dean got entranced by the Book of the Damned again as it sat in Sam's hand, despite being a room away from it.
"Dean." Elizabeth whispered, placing a hand on his knee.
That snapped him out of it, but not before Sam noticed too.
"You know what, Charlie... Why don't, uh, why don't we stick with my notes for a little bit? This book is literally making my eyes hurt." The younger brother chuckled, placing the book back in the warded, lead-lined box they'd found in the Bunker.

A few hours later, Charlie was rather clearly getting impatient.
"Okay, even the Bletchley Circle couldn't crack this thing. I have tried every cryptographic algorithm there is." She huffed.
"You know, maybe that's not such a bad thing." Dean mumbled, looking through one of the Men of Letters files. "Those people following you? All kinds of wrong." He turned to Elizabeth. "The 'Styne' family mean anything to you?"
Elizabeth's blood practically curdled.
"Yeah..." She nodded. "I pissed off one of them during the Second World War. Had my ass hunted down by the whole family for almost two decades."
"That sounds about right." The older brother said, turning to the other two in the room. "We're talking multi-generational, centuries old wrong. The Men of Letters files has the Stynes on file dating all the way back to the early eighteen hundreds. They use spells to create disease, de-stabilise markets – hell, they even helped the Nazis before they came to power and they profited from all of it." 
"So... They're like the supernatural Du Ponts?" Charlie asked as she, Sam and Elizabeth looked over the file.
"Basically." Dean replied. "All the spells they used came from a book of 'unspeakable evil', which they lost nearly a hundred years ago."
"I'm guessing that book would be the Book of the Damned." Elizabeth nodded.
"Okay, so they're bad." Sam commented. "So what? We've faced worse."
"Na, you don't get it. This family is crazy powerful." Elizabeth gave a nervous chuckle. "They scare me for crying out loud."
"Sam, read the file." Dean sighed. "The way the book works is, when you use it, there is a negative reaction – I'm talking biblical negative. Dark magic always comes with a price, we know that. We've been down that road before."
"Well, let's at least translate it, see what it says-"
"You guys don't understand. The book's been calling out to me ever since I laid eyes on it, okay?" Dean cut Charlie off. "Calling out to the Mark like it has to Elizabeth. I can hear it like it's alive. It wants me to use it, but not for good. Hell, it even burned 'Liza and we don't even know what caused that or if something worse could happen... Look, I wanted it to be the answer, too. I really did. But we have to get rid of that. Burn it, bury it, I don't give a damn. We'll just have to find another way to fix the Mark."
"Like what?" Sam retorted.
"I don't know..." Dean mumbled, sipping some water from a mug.
"So, you're giving up?" Charlie huffed.
"No, I'm not giving up." The older brother scoffed. "Charlie, I don't have a death wish. Okay, even if I did, I can't die. Not with this thing on my arm. But what I can do is I can fight it as long as I can until-"
"Until what?" Sam frowned, standing up from his spot on the couch. "Tell me. Until what, Dean? Until we watch you become a Demon again? Until then? I can't do that. I won't do that."
"Well, then you'll just have to lock me up. Bind me to the Bunker like you did last time." Dean replied.
"That doesn't solve anything." Charlie said.
"Dean, we're not just going to sit around and watch you waste away into a shell of your former self. If this is the answer, then it's the answer. Then we'll deal with whatever crap comes after. As a family." Elizabeth snapped.
"Look, just let us translate the book, okay? If there's a cure, we'll do it and, like Elizabeth said, deal with the consequences later. I can't lose you." Sam's voice started to sound as though he was pleading.
Dean looked down.
"Really?" He asked sceptically.
"Yeah, really." Sam nodded.
"You change your mind on that, 'cause that's not what you said last time." The older brother retorted.
Boy, did that boil some blood.
Elizabeth stormed over to him, slapping him across the face so hard that Dean hit the ground. She leered over him with dark eyes as he clutched his cheek.
"You know damn well he didn't mean that. And you have the bloody audacity to bring that up again?" As soon as she finished her sentence, she realised what she'd done. She looked around at the others, her eyes wide. "Dean... Oh my God... I didn't mean to do th-I... I need to go. I'm sorry."
She Vamp sped out of the cabin, leaving the others in a stunned silence.
"She never would've done that. It's that damn book. Is that enough for you? We're not using it." Dean snapped, getting to his feet.