Description: Moriarty returns from hell more powerful than ever, and now with a demonic network to back him up. Sam and Dean unwittingly fall into a game much bigger than they imagined. Focuses on Supernatural element rather than Sherlock, but don't worry, he still comes into play a little.

AN: This is all for Deanie BAEby. I'm using her nickname for privacy reasons. I've been rping this crossover with her for months and she's what inspired me to do this. Between us, she is the Sherlock expert and so sorry if I'm a little OOC with those characters, because even she doesn't get any sneak peeks for this story. Story and chapter titles from Three Days Grace Song, Sign of the Times.

Sebastian Moran shoved more gravel into the hole in the ground, dirt cramming its way under his fingernails. He stood up, the crescent moon illuminating his dark suit, although it was nothing in comparison to his dark intention. He waited for several more minutes, still not even sure that what he was doing would work, when a new shadow silhouetted on the ground.

If she really was what Sebastian thought she was, then she was far from what he had imagined. She had golden blond hair, which flowed down her back and past her shoulders in a gentle curl. Her black dress hugged her body in all the right ways, highlighting every curve.

A sneaky smile moved in a dance of light words, but in a seductive tone. "Hello, love."

"I take it you know who I am?"

"Oh, Seb, we've all been waiting for you to call. I'm just glad I'm the one that gets to seal the deal.

It had been such a long time that he had been without Moriarty, and this was the way to get him back. Selling his soul to a demon would damn him, but he had been damned long ago. What good is his soul to him now?

"So," she cooed as she moved in close, sliding her hand down his cheek. "What can I do for you?" She asked sweetly as her eyes went completely red.

"Moriarty." There wasn't any pause. "I know you can bring him back. So do it."

"My, my." Her cutesy smile turned to a pout. "You're just no fun whatsoever. But," she let out an over exaggerated sigh. "Yes, I can get your boss back. But, that's not all I can do for him."

That wasn't the answer he had anticipated. He had planned on bringing Moriarty back and paying his due ten years later. "What else are you offering?"

The demon grinned. "I can make him stronger than he ever was before. He'll be more powerful than you can even imagine."

Could that even be possible? It seemed far too good to be true, which meant it probably was. "What's the catch?"

Her expression went back to a disappointed frown. "You just like to skip right over the good stuff, don't you? But you are smart. I'll give you that. Unfortunately, for you anyway, you are right."

"So, what is it, then?"

She smiled as though she was talking about the most natural thing. "You die."

His eyebrows rose. "I already knew-"

"Not in ten years. Right now."

A rush of disbelief and slight fear washed over Sebastian. Moriarty needed him, and he needed to be there for him. But… not as much as the world needed its only consulting criminal.

"And don't worry, Sebbie, we won't leave him all on his own. We've got a nice little replacement lined up after your, oh so tragic, passing. They'll even use your meatsuit to make Jimmy feel right at home."

If you'd asked him Sebastian wouldn't have admitted it, but he hesitated. "I-I don't-"

"Well make up your mind. My offer won't last long, love." She began making a "tick-tock" sound with her tongue as she started to turn away.

"Alright, fine. But you better keep your promise."

The demon was beside him in a second. Although, against was probably a more appropriate word. "Oh, don't you fuss over that. Once the deal is sealed, I have to follow through with it. So," She grabbed him by the collar of his suit and pulled him close, her hot breath tickling his face. "Let's make a deal."

Sebastian hadn't been planning on there being so much passion in the kiss, but her gentle hand held his face close to hers as her tongue plundered his mouth. After what seemed like far too long, she pulled away from him.

"Hope you like fetch, big boy."

Before he could ask what she meant, she vanished. The last things Sebastian ever knew were the sounds of barking dogs, and the sight of menacing, bloodstained teeth.

Moriarty was surrounded with flames one minute, then he was on a gravel crossroads, some of the ground tinted crimson. He was greeted by a woman in a sleek black dress, the kind even Irene would appreciate,

"Welcome back to the surface, James."

Playing Jim from IT taught him how to give a friendly smile, like the one he gave her. "Jim, please."

"How was Hell? I haven't been in a while."

Moriarty shrugged. "I thought it would be a bit toastier, but I suppose I was kept rather entertained. I was just beginning to have fun, actually. Still, here I am."

The woman chuckled at him. "You can thank dear Sebastian for that. You must be pretty special to get a soul sold for you."

"That's rather noble of him. Where's he gone off to then?"

She smirked. "Hell. Well, part of him, anyways."

A detached sigh passed his lips. "So soon for one so promising. Suppose it was inevitable."

"You should know though," her manicured fingers trailed down his face and began straightening his tie. "He didn't just bring you back. He asked to bring you back stronger than ever before. Can you feel it inside you?"

"Sweetheart, I've always been the most powerful man in the world, what exactly am I supposed to be feeling?"

"Have you looked in the mirror lately?"

Moriarty's eyebrows went up as he scoffed. "Hell wasn't too big on hygiene, so I'm going to have to say no."

The woman snapped her fingers, and they were both taken to a room with a large mirror in front of them. "Look at your eyes."

Obliging, Moriarty glanced into the mirror. There were no scars from hell, no sign of the tortures he had endured. No mark left on him except for the deep black eyes he had that stared back at him. He'd seen enough of those eyes know that they were those of a demon. An unexpected, but certainly not unwelcome change. By willing his eyes to return to their normal shade, they did.

The woman casually draped her arms over his shoulders and rested her head upon them as well. "Like it?" Her tone was similar to a child presenting a nonsense scribble to their parents.

Moriarty grinned with a new excitement for life. "Oh, yes." With a thought, the mirror started cracking, and then shattered to pieces that he didn't bother dodging. "This will do just splendidly."

The demon nonchalantly plucked a shard of glass from her shoulder. "Careful with the meatsuit, I still got deals to make with this. Enjoy yourself all you want, but do be careful. Hunters will track you down otherwise.

"Honey, authority has never been my strong point. I intend to do whatever I please, and I've no intention of being subtle."

"Fine, don't listen to me, but your new partner will tell you the same thing."

"Partner? I don't do partners, love."

"Sorry, Jimmy, part of the deal. Either suck it up, or you can head right back downstairs. We're even using dear Sebbie's body for you to make you more comfortable. Same body, different occupant."

Another irritated sigh. "Alright, I'll make do then, I suppose. Now run along, dearie, I've got a few friends to say hello to."

A couple of network connections, and a few possessions here and there, and Moriarty's face was on every television, phone, or screen in all of London, mockingly repeating the same four words. Did you miss me? Did you miss me? Did you miss me? He stood disguised in the crowd, grinning at the panic and mayhem.

It felt good to be home.

"Holy crap." Sam said on a breath.

"'Holy crap" what, Sam?" Dean asked as he sat up from his bed. "Find a case?

"Yeah, big, weird one."

"Think it's Eve?"

Sam shook his head, eyes still fixated in his computer screen. No, but it's huge. So, there was this guy named Jim Moriarty. He called himself a consulting criminal-"

"The hell's that mean?"

Sam finally brought his eyes up, with a semi-disgusted look in them. "He arranged murders. Made them almost unsolvable, he was a monster."

"So how'd he get caught if they're so unsolvable?"

"That's what I was wondering. When I looked up Jim's cases, this came up." Sam turned the laptop towards his brother as he made his way to the table.

"John Watson's blog?"

"Apparently his roommate solves murders and other stuff for a living. Some guy named Sherlock Holmes."

Dean scanned the computer for a few moments longer. "Think they're more than just roommates?"

Sam rolled his hazel eyes. "Dude, John's married… To a woman. And seriously? That's your question?"

"Fine, go on."

"Okay, so, Sherlock solves all these cases. He's like some kind of genius. He's even labeled himself as a, get this, "High functioning sociopath.'"

"Sounds like he's fun at parties."

"Just, shut up, please? I haven't even gotten to our part of the case yet. So, Jim gets caught, but he doesn't get put in prison. Sounds like the trial was rigged. He's apparently got this huge network that makes him almost unbeatable."

"I take it he got taken down anyway?"

"Not in the way you'd think. Basically Jim was trying to make Sherlock look like a fraud by making him jump off a building-"

"What?"

"Just, roll with it, this is where it gets weird. Jim ends up shooting himself in the head, and Sherlock ends up faking his death, but get this. Jim's back."

"Back? How does one come back from getting shot in the head?"

"Exactly. And he wasn't very quiet about his return. Every screen started showing his face repeating the same message over and over. 'Did you miss me?'"

"Has anyone actually seen the guy yet?"

"Well…" Sam rubbed the back of his neck anxiously. "Not in person…"

"You said he had a network. Maybe they're just trying to freak everybody out."

Sam gave him a doubting glance. "I don't think so, Dean. It really feels like one of our cases. Can't we just check it out?"

"I don't know, Sammy."

Sam let out a tired sigh. "Dean, please. I just got my soul back, and I'm ready for a real hunt."

Damn those puppy eyes. "Alright, fine. Where are we going?" There was a defining silence, and as long as Dean had been hoping for it, he found no comfort in it. "Sammy?"

"…London."

"Oh hell no! We're not going oversea for a maybe."

Sam waited a moment before further defending his point. "There's something else. Moriarty had this right hand dude named Sebastian. Someone found his body ripped to shreds…"

"…Okay?"

Sam nervously bit his lip. "At a crossroads. And by the time the cops showed up, the body was gone."

Dean's face went from annoyed to pissed in less than a second. "And you didn't think to tell me that earlier?"

"Because I knew you'd try to talk me out of it."

"Damn right I would! You just got back in the game, Sammy, we don't need to be taking on something this big right now."

"Who else is gonna do it, Dean?" Sam argued. "You can't keep me out of hunting when I know that people are dying. If the situation were reversed, would you walk away?"

Dean hates it when Sam's right, which unfortunately is a lot. "Fine, you win. But you're buying drinks after the plane ride."

AN: Sorry about the lack of action and I realize that it was a little rushed, but I'm just trying to get to the good parts of the story. Like I said, I'm better acquainted with Supernatural than Sherlock, so I apologize if I'm a bit OOC. Let me know what you thought so far in a review if you've got the time!