Mirror
Bill didn't dream of anything. Which was great because he didn't have to worry about the triangle again. Bill could tell something was off, what was it? Slowly Bill took in his new surroundings, everything was darkened and he couldn't make out any shapes. A soft blue glow echoed in the room and a body mirror appeared, it had strange shapes... er symbols on it. Somehow the symbols seemed familiar to Bill, he approached it slowly. At first it was a soft glow but once Bill was in view enough to see himself, the glow grew brighter and the symbols began flashing. Pine tree, shooting star, ice bag, llama and so all began to flash then they stopped. One flashed a certain amount of times and then another flashed as well "6-9-14-4 9-20? What does it mean?" Bill questioned 'find it,' a voice in his conscious said somewhere "find it? Where did I see it?" Bill mumbled thinking back. A thought ran across his mind, Dipper and Ford! He saw Dipper and Ford bring a covered up mirror home! "That's it Dipper should know!" The blond realized and suddenly the mirror stopped on the pine tree, it echoed a image about a boy. A boy with a blue pine tree hat. Bill walked back, startled, and slowly the image began to age until it stopped on a 19 year old Dipper.
Bill lurched awake touching his eye, his blind left eye. The blond got out of bed and walked to the bathroom.
He wanted to scream, over his eye it was a little triangle guy, surrounding his blind eye. It definitely was a scar. Bill needed to find the mirror and from whet it looks like outside, nobody would be up this late well except probably one of the grunkles, They probably are passed out on the sofa anyway.
Bill rushed down stairs and checked the 'BILL STAY OUT' room and from the name, Bill assumed this is where the mirror was.
He crept in and shut the door carefully, not wanting the attention to be spotted. The room was dark with a long tall thing in the back covered, quickly Bill yanked the cover off and revealed the hidden glass beneath. The blond traced the shapes of each symbol until he stopped on the pine tree "Dipper, like in the dream," Bill whispered. Slowly the mirror lit up and reflected Bill then morphed into Dipper, standing outside a closed door with BILL written in capitals, his sister and Ford with him as well "Bill get out of there!" Dipper called from behind the door "The triangle is really me isn't?" Bill muttered, a newly found anger and hate bubbling up "Bill let us in! We can explain!" Mabel shouted. Bill opened the door, still standing next to the mirror, the door engulfed in blue flames "Bill," it was a soft whisper from Mabel "Boy get away from that mirror!" Ford shouted. Suddenly Bill's scar glowed blue "You lied to me... YOU MADE IT ALL UP! GUESS WHAT KIDDIES! IVE GOT SOME CORPSES TO MAKE AND WORLDS TO-" the blond was cut short. why was he in pain? Why was he here? Bill looked to the three by the door and a word escaped his lips "help..." it was soft almost unhearable when he hit the floor.
Dipper paced across the floor, what were they going to tell Bill? Oh hey your a dream demon that tried to kill us when we were twelve! Ford came back from the bedroom "It best to tell him slowly when he wakes up," The six fingered man said.