Author's Note: Hello! This is my first fan fiction on this site, let me know what you guys think! I hope you guys like this!

Adventure Time With Fionna and Cake: Fionna and the Beast

Prologue

The night sky shone clear with a dark navy blue hue as the full moon cast its light upon the land of Aaa. That night everything was still and peacefull, except for a slim shadow that flew over the plains. He floated about with no intention, other than finding people to frighten. No one was in sight, and this upset him a little. Who would waste a perfectly fine night like this on staying indoors? Suddenly a figure in the distance caught his attention. Finally there was someone to scare! He turned himself invisible and silently flew to the hunched over figure. As he got closer, he could hear her muttering under her breath.
"Soon, I'll be home safe and sound." the woman said, unbeknownst to her the invisible boy was almost upon her. He became visible again, and morphed his face into a monsterous bat like form. He let out a demonic hiss, which caused the woman to shriek in fear. The boy changed back into his normal form, floating on his back, and clenching his stomach in laughter.
"Well if it isn't the infamous Vampire King." The woman said, a little to coolly.
"The one and only." he replied, still chuckling.
"Well, you should watch who you sneak up on." The woman sounded a little more threatening, but the Vampire King waved off the woman's threatening tone.
"Oh please, if you're trying to scare me it's not working." At this comment the woman became very angry, and glared at the vampire, fury in her eyes.
"That's it Marshall Lee!" And soon the woman revealed herself to be none other than Magic Woman, "You have caused enough trouble! For your lack of compassion and respect to others, you shall be CURSED!"
Magic Woman raised her hand to the stunned Marshall Lee, and soon he was brought to his knees by a blinding green light. He was screaming and writhing with pain, almost as painful as being exposed to sunlight. His form started to change, becoming more grotesque as the curse took hold.
"There is a lesson to be learned here Marshall." Magic Woman said in a taunting sing song voice to the form on the ground, "Maybe if you learn it, the spell will be broken." and with that she dissapeared.