"Slow down, you need to think this through!" Sam shouted after Schneep as he chased after him, reaching out towards the German and grabbing into his shoulder to stop him in his tracks.

"He's saved my life, I can't just let him die vhile I do nothing!" Schneep argued as he yanked his shoulder free from Sam's grip, turning to see a  familiar raven haired male dressed in a black suit standing at the end of the hall.

"Uh, hello." Dean greeted them, the demon's eyes shifting from a dark brown color to a blood red shade.

"Hello Winchesters, Doctor Schneeplestien." Dark greeted the trio, casually sauntering towards Schneep.

"Let's take this conversation to somewhere more private." Dark decided, grabbing Schneep before disappearing.

The pair instantly appeared on the roof of the hotel away from everyone else, the wind billowing around them.

"I've come to make a deal with you." Dark stated, the German taking a step back as Dark moved forward.

"Vhat do you vant zhat I have?" Schneep prompted with a confused frown, a smirk spreading on Dark's face.

"Hey, leave him alone." Dean warned as he and Sam appeared with Cas, stepping in between Schneep and Dark.

The demon glanced at the brothers before he flicked his wrist, sending them flying towards the edge of the building before he pressed a hand to a sign painted on the ground.

Cas abruptly disappeared in a flask of white light as Dark moved his hand, leaving Dark alone with Schneep.

"Anti still needs a vessel, he won't survive long without one. So, if you agree to be Anti's vessel without fighting him, I'll forget all about the deal Marvin made." Dark offered, Sam and Dean recovering.

"Vhy should I trust zhat you vill honor your end of zhe deal?" Schneep countered, the brothers rejoining the German's side.

"I may be a demon, but I always keep my deals." Dark promised.

"You can't trust hi-"

Dark rolled his eyes as he made a gesture with his hand, cutting of Dean as he and Sam slammed against the door of the fire escape unable to move.

"So, what do you say? Your freedom for Marvin's soul." Dark continued, offering Schneep a hand to shake.

Schneep reached for the demon's hand to close the deal, his fingers brushing against Dark's hand before Marvin appeared.

"Stop!" Marvin pleaded desperately, his arm wrapped around his abdomen as he struggled to stand.

"Hello Marvin, perfect timing." Dark chuckled coldly, lowering his hand as he looked at the magician.

"I can't let you throw away your life for me Henrik, you're too important!" Marvin protested fiercely.

"I killed everyone zhat ever cared about me!" Schneep cried, his voice cracking with emotion as he thought of Doctor Iplier and all of the patients.

"That's not true. I care about you, you've suffered through so much for me, someone you barely know." Marvin argued.

"How cute." Dark sneered, returning his attention to Schneep as he offered the German his hand once more.

"So, do we have a deal?" Dark prompted, Schneep looking over at Marvin one last time before he took Dark's hand in his and shook it.

A stream of black smoke flew towards Schneep and poured into his mouth, Sam and Dean still struggling against Dark's power while Marvin screamed the German's name.

"Ah, much better. Thanks for the help." Anti nodded in appreciation, popping his neck before looking at Marvin.

"So I can't take his soul. The deal never said that I couldn't take his life." Anti declared with a grin as he strode towards the magician.

Marvin didn't fight back as Anti punched him hard in the gut, causing the magician to fall to his knees with a wheeze.

Dark made sure the Winchesters stayed where they were as he watched Anti, his eyes lit up with amusement.

"You know, it's boring when you don't fight back." Anti remarked, hitting Marvin with an upper cut to the jaw.

The magician's head snapped back before hanging limp, the male spitting out a string of blood as he looked into Anti's eyes in defeat.

"Henrik, this isn't you!" Marvin called out, Anti kicking him in the chest to make him fly across the rooftop.

Marvin's body skidded to a stop inches from the edge, the magician's arms shaking with the effort it took for him to try and stand up.

Anti kicked Marvin's arms to make him hit the ground before lifting the magician up by the front of his shirt and punching him in the face.

A long crack grew in the middle of his mask, Marvin barely conscious as Anti punched him again in the face.

Half of his mask fell off to the ground, revealing part of his face before Marvin shifted into a cat and clawed at Anti's face.

"Ow!" Anti snarled, a long red scratch trailing down his cheek as he dropped Marvin and put a hand to his face.

Anti watched Marvin stumble over his own paws before hitting the ground, letting out a weak meow as he struggled to get back up.

Anti stood over Marvin prepared to deliver the final blow, the demon hesitating as his eye color flickered between blue and black.

"You're breaking the deal!" Dark roared angrily, Anti crying out in rage before Schneep took back control of his body.

"Bite me you motherfucka." Schneep retorted, Dark's fingers curled into fists at his side as he glared at the German.

Dark's fingers suddenly uncurled themselves, the anger draining out of his eyes as he let out a long weary sigh and let Dean and Sam go.

"I just want Anti by my side." Dark whispered, Sam and Dean running over to Schneep to make sure he was okay.

"You don't deserve it." Dean shot back bitterly.

"I deserve to be loved!" Dark yelled back, tears glittering in his eyes as he bowed his head in defeat.

"If I see any of you ever again, I won't hesitate to kill you." Dark growled, looking up at the trio before disappearing.

Schneep tilted his head back as a black smoke poured out of his mouth, allowing him to be in complete control of his body.

"Marvin!" Schneep cried, darting over to the white cat's side with Sam and Dean following.

One of his ribs was shattered, the magician lying in a pool of his own blood with his eyes closed.

"No..." Schneep breathed, his eyes welling with tears as he rested a hand on the cat's head.

"Doc-"

"Shut zhe fuck up!" Schneep interrupted furiously, carefully cradling the white cat in his arms.

"He's gone, there's nothing you can do for him." Sam chimed in gently, the German sniffing as tears trailed down his cheeks.

"No, I von't give up on him." Schneep declared, standing up and walking towards the fire escape.

"Vell, I'll just have to fix you up myself at hotel, won't I?" Schneep mused tearfully, looking down at the cat as a tear drop dripped down onto Marvin's white fur.

"Mein mieze."