I do not own Adventure Time. If only...

My first fanfic, please read and review!

Chapter 1: Prolouge; A Normal Day

Finn opened his eyes quickly. He hadn't dreamt last night, which was unusual. He sat up and yawned. There was a point in his field of vision, but he figured he just had something in his eye and ignored it.
"Jake? You up?" No reply.

"Jake!"

A yellow dog named Jake ran into the room, but not the stretchy, wise-cracking dog he was used to. It ran on all fours and barked. Finn looked around and realized that he was in an unfamiliar place.

A blonde woman suddenly appeared near Finn, holding a baby.

"Finn, the Destiny Gang is coming. Take Bar-" She stopped. Everything around Finn melted away, and he could feel the heat, but his entire body was cold.

A giant, yellow owl, whose body looked liquefied appeared. It screeched loudly, and Finn tried to cover his ears, but he found his body to be frozen. He screamed, trying to block out the noise. No luck. He had to endure it.

Finn's eyes snapped open. He threw himself off of his bed and gasped for air. He looked at his arms. Not frozen. He looked around at the inside of his tree house Not melting. The point in his view was gone, but he barely noticed it before. He felt happy and relieved to be back where he belonged, but also felt worried. That big bird was the Cosmic Owl. He only appears in dreams that mean something.

He changed into his day clothes and went into the bathroom to take a shower and brush his teeth. He turned on the shower water and decided it was too much of a hassle, the same with his toothbrush.

"BWOOOOWOOP." He slid down the ladder into the living area. "Jake," he said loudly, as his dog/adopted brother was not in the room. "Coffee, in my mouth, now." Finn sat at a table and closed his eyes as Jake handed him his coffee.

"Here you go," said the magical dog.

"Heheh, right on."

"And how about some manners next time, please?"

"Don't be a butt," Finn said before gulping half of the mug.

"Is it good?" asked Jake.

Finn opened his eyes to see Jake had changed his form to look like some sort of fat bunny rabbit. Jake had been able to shapeshift and stretch since he was a pup, because he rolled in a magical puddle of mud. Finn spat out the coffee he had in his mouth.

"Needs more sugar, huh?"

"Jake, what the heck did you change into?"

"What?" He paused. "Oh yeah. I'm not sure. I just kind of woke up like this. Figured I dream-stretched or something." He muttered, "Some kind of rabbit?"

"Pfft," laughed Finn. "Well change back, you look way too hilarious."

"Yeah, alright," Jake said somewhat lazily. He kept a straight face, as it usually doesn't take any effort to change shape. He started to struggle. "Hmph..." He started holding his breath. After a few seconds, he exhaled deeply, "Gah! I can't back!"

"Oh my Grod!" cried Finn.

"Heehee," sounded a figure hanging by the outside of the window. Finn turned quickly to see a blue man with a large nose: The Ice King. He was wearing a big tunic that made him look fat, when he was actually quite skinny. His white beard flowed down to his knees. He wore a golden crown imbued with evil ice magic, but the things he did with it were hardly evil.

"ICE KING!" yelled Finn.

"Oops," said the magician. His beard flapped and he flew away towards the icy mountains of the Ice Kingdom in which he resided.

"CHYAAH!" Finn screamed as he kicked through the window. It was one of his trademark yells.

"Dude, that's our window," said Jake as Finn landed on the ground outside. Ice King was still in view. When Finn ran as fast as he could, he could almost catch up to the speed of the Ice King's beard. He would arrive seconds after Ice king, plus the time it took him to climb the mountain.

After about ten minutes, Finn hopped into the triangular window that was now the only way into Ice King's home. He saw the Ice King's crown behind a recliner.

He jump-kicked the furniture, only for the crown to fall to the ground. Finn glanced at it for a second.
"My recliner!" cried the Ice King. He was poking his head out from behind a pillar of ice. Faster than the blue fool could realize, Finn leaped only inches away from him and punched him in the nose.

"Ouch!" He fell to ground, but got up after a few seconds of reviewing what the heck just happened.

"Now Finn," he said, somewhat painfully, "I know you're mad, but that's no reason to around breaking everything. That includes my giant honker of a nose."

"What did you do to Jake?!" Finn questioned.

"Well you see," began the old man, "Gunther here, as you know, had mated with some kind magic cat." Gunther, the penguin, and its feline child came into the room. "Well, I don't like cats. I like bunny rabbits, though. So I used this magical potion" he held up the bottle "to turn your dog into a bunny, so that Gunther could mate with it."

Finn punched him again, this time in the jaw.

"Oof!"

"That! Is sick!" Finn surveyed the room for an antidote, and sure enough, it was on a shelf next to the knocked down recliner. Finn shivered, thinking of how dangerously close to breaking that he was. He grabbed it and left, leaving a semi-conscious Ice King on the floor with a slightly cracked potion next to him.
Gunther's eyes lit up. It had always had a thing for breaking bottles. It grabbed the bottle and prepared to break it over its cruel master.

"Wank."

Finn could hear the screams from the bottom of the mountain.

In a post-apocalyptic world similar to Finn's, a boy with blue-tinted skin and blonde hair was shooting ice at a giant, yellow, shape-shifting monster with a skeletal head.
"The power of FROST!"

Update 1/24/13: If you can really call this an update; some grammar mistakes and paragraph formatting.