In light of the season ten teaser video, I felt compelled to write this. Although I won't be getting into the actual episode the video was featuring until about the second or third chapter. This first chapter will be what prompted the "who's the real monster?" question.

CHAPTER ONE: Just A Sip

Sam was devastated to say the least.

Sure, Dean and him had a shitty year, but at the end they had fixed things between them.

But then, Dean didn't stay dead.

At first Sam wasn't having it. Crowley was going to bring Dean back because damnit, he got him into this mess. But when the King never showed, the youngest Winchester took it as a sign.

What's dead should stay dead.

Dean's words rang through Sam's mind as his heart raced, waiting for Crowley to show up.

Sam finally understood the desperation Dean must've felt every single time he had died.

And then he heard a noise from upstairs.

A creak, the slightest of creaks.

But enough to send a spark of hope throughout Sam's whole being.

Sprinting upstairs, Sam stopped when he saw his brother's bedroom door open. Gun out and ready, Sam approached the door he could've sworn he had shut.

Glancing in, he had to blink a couple of times to register exactly what he was seeing.

The bed Dean's dead body had been previously lying on was now empty. Now, in Sam's past experiences, most bodies don't jus t get up and walk out without something supernaturaly going on.

Finally registering that there was someone in the room, Sam turned his head to the left to see a smug looking Crowley staring at him, one hand in his trouser pocket.

"Hello Moose." The King said, trying to hide his amusement.

"Where's Dean?" Sam snapped, lunging at Crowley and pinning him against the wall.

"Dean's taking a small vacation. Don't worry; I'm sure he'll be up to see you soon." A sly grin crept across the former crossroad demons face.

"Up? Give me more than these vague ass answers!" The youngest Winchester demanded.

"Hell, Moose. Really? You didn't pick up on that?" Crowley asked, rolling his eyes as if Sam was just that incompetent.

Sam shoved his arm into The King's throat and pressed hard to cut off his oxygen. "Damnit Crowley why is he down there?" It was evident the hunter was losing his patience but at the moment, Crowley didn't care.

"Demon's tend to go there on a regular basis. Dean decided to start right away." Seeing Sam's look of confusion, he went on. "The Mark, Jolly Green."

It was like all the tumblers had fallen into place. The King could almost see the realization play across the youngest Winchester's face.

"No no no. You son of a bitch! You knew this would happen!" At last losing his grip on self control, Sam drove his fist into Crowley's stomach.

"You should really start to believe in miracles, Moose. I did and look what happened." With one last smirk at the hunter, Crowley snapped his fingers and vanished.

….

It was a whole new sensation for Dean.

He had never felt so… powerful.

Even before when he had just the Mark, he had never felt absolute control like this before.

Now, the Mark of Cain just added to all the powers he would normally have as a demon.

Everything was intensified.

Well, not everything.

For the most part it was just the need to kill anything in sight and not to give a fuck anymore.

After Dean had first woken up, First Blade in hand, Crowley watching intently, he had felt like a whole new person.

Now Dean just felt like this was who he was all along, it was just hidden under piles of self-loathing and misplaced guilt.

The second Crowley saw what the eldest Winchester had become he ordered him to go to Hell while he handled his brother.

Let's just say Dean wasn't in the mood to listen to some punk ass crossroad demon.

So instead, the former hunter went to Vegas.

Woman, booze, and hundreds of people just waiting to be sliced into.

Call it the new Dean Winchester's paradise.

…

Sam knew that this road never worked out for him in the past. Hell, it had driven a wedge between his and Dean's relationship.

But by this point, Sam doubted Dean even gave a shit anymore.

There were stories all over the news of different killings spread out the state of Nevada, mainly in Las Vegas. There wasn't a doubt in Sam's mind that it was his brother.

It started off with just a sip.

And then a flask full.

Then he was draining the bodies completely.

The sweet taste of demon blood was slipping past the youngest Winchester's lips once again. But this time it was for a better cause then just his own selfish vendettas.

The hunter knew that he wasn't strong enough to stop his brother, so he had to become strong enough.

The demon blood had to be enough to either stop Dean or torture some evil sons of bitches to figure out where the fuck he was and where Dean was going.

No matter how you defend it, Sam had gone off track once again.

,…...

TBC

Please leave reviews so I know to continue or not. It was just an idea floating around in my head and want to know if you guys liked it.