Hey guys! Thanks to everyone who saw my last story! This isn't related to that one at all so you don't have to read it for this one to make sense. I got this idea from a picture I saw on Facebook, it was Dean with demon eyes and the caption was the dialogue from the description. Being the dark story line lover that I am, I IMMEDIATELY wanted a fanfic about it and I thought, "Why not me?" The title (not surprisingly) comes from a song. "Demons" by Imagine Dragons. Each chapter title is gonna have lyrics from that song in them. There are probably other stories like this one and if you know any or have written one, let me know! I'd love to read it. Sorry if ya'll don't like Evil/Demon!Dean and or Angry/Hurt!Sam, but that's what I got in store for ya! The hellatus is just a good time for fanfiction, writing or reading. The story is set after they find Cain's blade, and kill Abaddon. (Future Fic).

"Adios, Bitch." Dean growled as he yanked Cain's blade from Abaddon's chest. Her face sparked to a glowing orange as her head twitched back. She fell to the ground with fire red hair spilling around her dead eyes.

Dean stood up taller, victorious.

"Well… Guess that means the campaign's over." Crowley joked looking down at Abaddon's lifeless body.

"Dean," Sam breathed out in relief, "You did it."

"Yeah, now we just gotta take care of-" He stopped midsentence as a sudden burning sensation coursed through his arm. Dean dropped to his knees rolling up his sleeve to reveal Cain's mark beaming red. He groaned excessively and fell to his back as spasms began to wrack his body.

"Dean? Dean!" Sam rushed to his flailing brother. "Hey, talk to me, man! What's happening? Dean!"

Dean's thrashing suddenly stopped and Dean's eyes flew open. Sam's mouth gaped and he back away.

Dean's eyes were deathly black.

Sam's breathing intensified heatedly. "You get out of him, right now!" Sam charged towards the demon inside Dean, but Castiel put his arms out as a barricade.

"Sam, that is Dean."

Dean flashed an eerie smile, black eyes glistening with hate.

"Heya, Sammy."

Dean waved his hand causing Sam to fly backward into the wall.

"Dean," Sam's voice shook with fear and disbelief, "What the hell's going on?"

Dean chuckled maniacally and his eyes turned back to their normal colour, but all humanity was vacant from them.

"Well, I don't know about you boys, but I'm out." Crowley snapped his fingers and vanished.

"Sam, we need to get out of here." Castiel said with a hint of fear seeping through his voice.

"No! I'm not gonna leave him!"

Castiel approached Sam and extended his hand. "I'm sorry, Sam."

"NO!" Sam hadn't even finished the word before Cas zapped them back to the bunker.

Sam spun towards the angel and glared.

"Take me back! Now!"

Castiel looked pitifully at Sam.

"Sam, I can't."

"Yes you can damnit! I can't leave him, now TAKE, ME, BACK!"

"Sam, he will kill you if he sees you again."

"No he won't! He's my brother!"

"Didn't seem to stop him from flinging you into a wall." Crowley pointed out as he appeared in the room.

Sam whipped his head to the new voice. "What do you want Crowley?" he spat.

Crowley raised his hand and snapped his fingers. All three of them were suddenly transported to an old, abandoned building. Sam's eyes darted around his new surroundings.

"What the hell was that about?"

"Oh nothing much, just saving your ass."

Sam cocked his head at Crowley and Crowley rolled his eyes.

"Fine, I'll elaborate. I'll use small words so you can be sure to understand. Little Deanmon knows everything Dean does, considering it is Dean, which includes your little hiding place. This way, he'll have no idea where you are.

"Which is where?" Castiel asked.

"Let's focus on the more important matter at hand for now, Cassie."

"In that case, "Sam hissed, "How bout you tell me what's wrong with Dean."

"Ah, right." Crowley sighed as he leaned casually into a table and placed his hands in his pockets. "Well, remember Deany boy killing Abaddon?"

Sam huffed out an irritated breath. "Yeah, it rings a bell."

"No need to get so touchy."

Sam stepped towards Crowley, but Castiel put a hand on his arm and pulled him back.

"Anyway," Crowley continued ignoring Sam's gesture, "Once ginger here kicked the bucket, there were no more knights of Hell left."

"Well that was sort of the point." Sam retorted.

"Samuel you mind not disrupting the class while I'm teaching?"

Sam opened his mouth to argue, but slowly closed it and bit the inside of his cheek.

"Thank you. Back to the point, Hell always needs at least one knight. Once Abaddon was dead, the runner up took her place."

"'Runner up?'"

"Forget Moose, maybe I should call you parrot." Crowley muttered as he rolled his eyes. "You see, the mark of Cain is kind of like a family crest, or like, a ceremonial crown for the next of kin. When the captain dies, first mate takes his place."

Sam's eyes widened to the point of bulging out of their sockets. His breaths turned shallow and shaky. He ran up to the demon and grabbed him by the collar and shoved him into the wall.

"You son of a bitch!" Sam shouted, rage oozing out of him. "You knew this would happen! This is your fault!" He emphasized his words by slamming Crowley's head into the wall as he shook him.

"Oh, don't get so emotional, I'm trying to help you."

Sam waited a minute longer before letting go. Crowley brushed himself off.

"Never thought you to be one to get so handsy, Moose." He put his hands back into his pockets. "Yes I knew this would happen, but it was necessary. The only person who could kill Abaddon was the one who bore the mark of Cain. Not my fault big brother was idiotic enough to do it."

Sam started to run towards him again, but Crowley held out his hand and froze Sam in place. Sam tried to speak, but no sound came through.

"Stay." Crowley commanded pointing one finger at Sam. "Listen, I can get your brother back."

"How?" Sam asked frantically, finding his voice again.

"Well, technically it's Cain who can get him back. We find him, and Winchester fun size goes back to normal. See, simple as that."

"Oh yeah, cuz finding Cain was the simplest thing last time!" Sam snapped.

"I did it once, I can do it again. After all, I am, undisputedly, the King of Hell."

"If you are so powerful now, "Castiel said suspiciously, "Why are you so willing to help us?"

Crowley smiled in a way that was just so, Crowley. "Without you boys, regrettably, I wouldn't've been able to stop Abaddon's pathetic scramble for power. Now that I'm in charge, I don't like the idea of being in anyone's debt, especially not a Winchester's. So, I figure, I help you out one last time, and after that, you boys are fair game. So," He said as he casually strode over to Sam and stared up at him, "Do we have a deal?"

Sam anxiously balled his hand into a fist and huffed out a breath.

"Fine."

Crowley chuckled. "Not gonna make me kiss you, are you?"

Sorry Dean fans, I know there wasn't a lot of him in this chapter, but there will be plenty soon. I hope I've made Demon!Dean seem logical and that I explained everything well enough. Second chapter is well on its way! Let me know what you guys think so far!