Welcome to my first straight-up Gravity Falls story! Don't worry, The Final Countdown will resume on Monday. So, anyways, I was surfing the web one day and I found a picture of a fusion of Bill Cipher and Dipper Pines. (NOT the one accompanying this story) I thought to myself, "That's a great starting point for a story!" And thus, this story was born! Enjoy!

Prologue: The Encounter

"Dipper! You have to fight back!" yelled Mabel Pines.

Above her was her brother, possessed by Bill Cipher. He wore an eyepatch over his right eye, along with a yellow suit with a white shirt, a black bow tie, a small black top hat, black pants with a black belt, and black shoes.

"Ah ha ha ha! It's soooo cute how you keep trying to reach Pine Tree! Now, hold still so I can kill you!" said Dipper in a fusion of his and Bill Cipher's voice.

He took aim with his finger. In explicably, his other hand pushed the hand Dipper was aiming with away, causing the laser to bounce off a piece of rubble and right back at him.

"Ow!" said Dipper, who suddenly seemed to be in internal pain. "Mabel...run...hide...and stay hidden. I need...time..."grunted Dipper in his normal voice before Bill took over again. "You WILL know me as your master, you insolent brat! Now...where'd Shooting Star run off to?"

From her hiding spot with Grunkle Stan, Soos, Wendy, and several other survivors, Mabel couldn't help but track the start of the insanity from the beginning...

Two Weeks Earlier...

Dipper Pines was running. Not for his health, but to escape one of the most powerful and dangerous creatures he'd ever met: Bill Mischief Cipher.

"Get back here, you little runt! It's time to pay the piper for all the trouble you've caused me lately!" said Bill.

As he ran, Dipper tripped over a tree root as Bill drew near. True to his adventures nature, Dipper looked Bill dead in the eye, knowing that this was probably game over.

"Oh, come on, Pine Tree! I have no intention on killing you! I've got something more beneficial for me in mind..." said Bill as his body lit up in blue flame. Dipper found himself completely unable to move as Bill spoke what seemed to be an incantation:

"Tantum sis homo mortalis,
Dum licet, ita uti corpus
Nam duo weeks tempus
Caro tua voluntas mea!"

As Bill finished the spell, the last thing Dipper knew before he lost conciousness was Bill's outline burned into his eyes and someone, a girl, calling his name...

And that concludes the prologue! Next time: Dipper begins to change...see you then, and don't forget to review!

TRANSLATION FOR BILL'S INCANTATION:

You are merely a mortal man

So enjoy your body while you can

For in two weeks time

Your flesh will be mine!