A/N: Sup, nerds! Just wanna warn you of the amount of blood in this fic and other Bill/SPN-related horror. Okay, have fun! Don't slip in the blood!

Cuz there's a lot of it.

A lot.

Dipper couldn't believe what he was seeing. She'd been beating it off. Mabel had had the upper hand; he had been sure of it. That was why it had flung him into a ditch, because it had needed to focus on fighting her. He'd even seen her land a solid punch on it just before he'd passed out.

But there she was, lying motionless on the ground. The yellow sweater she was wearing was torn up and covered in blood, and Dipper wasn't sure if the blood from the gash in her side or the blood that was still pouring from the gash in her head scared him more. Was she…? She couldn't be! She was Mabel! But, somehow, he knew. He knew she was… And it was his fault. And he couldn't live with that.

He wasn't sure how long he had been standing there, frozen, staring at his twin with wide, horror-filled eyes, but it felt like a small eternity before he reached a shaking hand towards her.

"M-Mabel?" he said, a crack in his voice and tears in his eyes.

"REAL SHAME, ISN'T IT?" Dipper started. He knew that voice. He still heard it in his nightmares. Greyscale seeped into the world as he spun around to face Bill Cipher, adopting a protective stance in front of Mabel even though he knew it would be useless to help her now. Absolutely useless. Just like he was: useless, obsessed, selfish. Mabel wouldn't have even been out here if it hadn't been for him and his stupid thirst for mystery!

"I ALWAYS LIKED HER," Bill continued to speak in that cheerful tone of his, snapping Dipper out of his thoughts," SHE HAD SPUNK! AND A HELL OF A LEFT HOOK!" Bill laughed and Dipper smashed his hands over his ears. He couldn't do this. He couldn't listen to Bill's laughter while Mabel was… was…

"SHUT UP!" he screamed, tears streaming down his face, "JUST SHUT UP! YOU DON'T KNOW THE FIRST THING ABOUT MABEL SO JUST. SHUT. UP!"

"YEESH, RELAX, PINE TREE," Bill said, "I'M HERE TO HELP YOU, AFTER ALL."

"No!" Dipper shouted, wiping his arm across his face, "No, you're not! You don't help people! You only ever help yourself!"

"THAT DOESN'T MEAN I CAN'T HELP YOU IN THE PROCESS," Bill said. He flew overhead, stopping to hover over Mabel's… over Mabel. Dipper didn't take his tear-filled eyes off of him for a second.

"I MEAN, WE COULD ALWAYS JUST LEAVE HER CORPSE HERE FOR THE GNOMES. SOME OF THEM HAVE TAKEN A REAL LIKING TO ROTTING FLESH." Dipper shuddered, and that image was almost all it took for him to give in.

"OOOOR YOU COULD LET ME HELP YOU BRING HER BACK." And that was it. There was no doubt or argument in his mind. Though, had there ever really been one, in the first place? Thinking about it, he realized that if Bill hadn't come right away, Dipper probably would have ended up summoning him and looking even more desperate than Bill knew he was. Dejected, Dipper turned his gaze away from Bill and back onto Mabel, his shoulders slumping.

"What do you want in return?" he asked, but he knew, and Bill knew that he knew.

"COME ON, NOW, PINE TREE. LET'S NOT DRAG THE NEGOTIATIONS OUT FOR LONGER THAN WE HAVE TO." A blue flame engulfed one of Bill's hands and he stretched it out towards Dipper. Dipper's stomach clenched when he looked up at it. He rubbed his own arm nervously, the one that Bill had smashed in a drawer. It still hadn't completely healed yet and Dipper still had to ask someone else to get silverware for him from that drawer. He took another glance down at Mabel, reminding himself that he had no choice. Choking on one more sob, he squeezed his eyes shut and turned to glare at Bill, taking his hand and sealing the deal.

He already knew what it felt like to be ripped out of his own body, but it was even worse the second time. He screamed because it was the only possible reaction for him to have in the state he was being forced into. In reality, he felt like crying and shaking and curling up and vomiting. As he got his bearings, though, he noticed that something wasn't right. The monster was lying motionless on the ground where Mabel had been just moments ago, and Mabel was at Dipper's body's side, trying to wake him up. Only one arm of her sweater was missing and the only blood on her was from a small gash in her arm and an even smaller cut on her cheek.

Bill had tricked him.

"No no no!" Dipper shouted, trying to get back into his body, but it was too late. Bipper had already woken up. He looked Dipper straight in the eye and started laughing hysterically, much to the confusion of Mabel.

"Dipper?" she asked, reaching a tentative hand towards his body's shoulder, "You okay, bro-bro?"

"FINE!" Bill said, turning to face Mabel, "EVERYONE'S FINE!" He flashed a glance at Dipper who was too full of shock and rage to say anything back. Mabel wasn't convinced, but she must have thought that Dipper had just hit his head too hard because she helped Bill to his feet.

"Let's just get you back to the Shack," she said.

"SOUNDS LIKE A REAL SWELL IDEA," Bill said. He was wobbly on Dipper's legs, at first, but Mabel helped him out.

"You sure you're okay?" she asked, "You hit that tree pretty hard."

"I'VE NEVER FELT BETTER, SISTER!" Bill said, slinging Dipper's arm across he shoulders. He left it there for support when he realized that he was still having some trouble getting his footing.

"Sure, Dip-Dop," she said with a roll of her eyes and continued on to talk about how the rest of the fight had gone. Dipper had caught up to them, by that time, having been frozen in place for the second time in the span of a few minutes.

"What are you up to, Bill?" he demanded. Bill only smiled at him, as if to say 'Wouldn't you like to know?'

When they got back to the Mystery Shack, Mabel sat Bill down in a chair in the kitchen.

"I'm gonna go get the first aid kit. Stay," she said, mustering up her Serious Face. Bill gave her a too-wide grin and two thumbs up and she left with a swish of her hair. Dipper lowered himself to where Mabel had been standing, glaring at Bill with his arms folded. Bill ignored him and, as soon as Mabel was out of sight, he stood up and walked towards the gift shop, purposefully going through Dipper on his way. Dipper's form distorted itself to let Bill through, then shuddered back to normal. That hadn't been anything like phasing through inanimate objects or even other people and Dipper made a mental note to never let it happen again.

He followed Bill into the gift shop and up to the vending machine. The portal. Grunkle Ford!

"Bill, stop this!" Dipper said. Bill continued to ignore him, punching the code into the machine. At least he actually walked down the steps this time instead of letting Dipper's body fall. Dipper pressed on, floating ahead a little to try and get Bill's attention again. What he saw made him fly forward as fast as he could to try and do something, anything, to warn Grunkle Ford. Somehow, Bill's already too-wide grin had gotten wider, and the bloodlust in it didn't spell anything good for the next person who met his path.

He shouted his great uncle's name over and over. He waved his arms, flew through machinery, and even flew through the man himself. But for a slight shiver when Dipper flew through him, Ford didn't acknowledge his presence at all. He was far too focused on his machine. When Stan had fixed it, he'd fixed it well. Well enough that it was still somewhat active now, nearly a month after he'd brought Ford through it.

Dipper saw Bill approaching with a heavy-looking metal pipe. He flew through Ford a few more times, causing the man to shiver more violently and finally, finally distracting him from his work.

"Dammit, what is that?" Ford said, glaring straight ahead at nothing in particular.

"Turn around turn around turn around!" Dipper shouted, but Ford couldn't hear him and Bill managed to land a solid blow on the back of Ford's head. He chuckled as Ford went down, twirling the pipe the way he twirled his cane. He then tossed the object away and jumped onto Ford's unconscious body in order to get a better look at the controls. He pushed a few buttons and flicked a few switches here and there. The portal lit up, glowing as bright as it had on the night Dipper had discovered it. The first gravitational anomaly hit and Bill began to chuckle again, the sound growing more and more manic with each passing second. He pushed himself off the wall and floated into the portal room, closer and closer to the portal, itself.

"No! No!" Dipper shouted, trying in vain to get in his way, to stop him somehow. Bill just kept laughing.

"Dipper!" They both turned around to see Mabel holding onto the doorway, trying to keep herself from floating up any further. Stan was behind the controls trying to wake his brother up. Dipper wasn't sure if they had come downstairs when they had noticed that he was missing or when the anomaly had started, but it didn't matter. They shouldn't be here!

"YOU'RE TOO LATE, SHOOTING STAR!" Bill said. He laughed once more at the look of horror on her face, then disappeared into the portal. Dipper tried to follow, but found that he couldn't. It was as if the portal was a solid wall to him.

"No!" Mabel shouted. She pushed herself off of the doorframe to go after him.

"Mabel!" Stan shouted, abandoning his attempts to wake Ford in order to go after her. Ford woke up a moment later, though, and it took a moment more for him to get his bearings and notice his brother and niece hurtling towards the now-very-much-more-active portal. He gasped and, without thinking, propelled himself towards them.

Stan had grabbed Mabel—who was still reaching towards the portal—and a wire by then, but Ford was still coming towards them. He realized too late that what he was doing was stupid and useless and, unable to stop himself, ended up ramming into them. The wire snapped and the trio continued to hurtle forward, screaming and clinging to each other for the entire rest of the short distance into the portal.

As soon as they went through, it turned off.

Bodiless and invisible, Dipper floated in front of the large machine, frozen in shock for the third time that day.