I do not own Star wars or Adventure Time. Please support the official release.

This is a major Au.

Our Adventure time Finn will replace the Star wars Finn and will be paired with Rey.

Also Finns mechanical arm is the same as Edward Elric's, but it goes all the way up to his bicep.

In deep space:

In the middle of the galaxy was a massive fleet. The fleet of The First Order.

It took over 30 years after emporer Palptine and his galactic empire was destroyed by the Rebel alliance and Jedi knight Luke Skywalker But it was soon replaced by the First Order, Luke mysteriously dissapeared and a new rebel group named The Resistance led by General Leia Organa, opposes them while looking for her brother, Luke Skywalker.

Now a Star Destroyer approached a planet covered in white and gray. More hovered in orbit with hundreds of TIE Fighters patroling the area. A shuttle that belonged to Kylo Ren an influencial member of the First Orders power structure. He entered the planets atmosphere and flew in across landscapes of ice and smoking volcanoes. The intimidating shuttle was escorted by two patrol-crafts, heavily armed and armored, toward a massive palace. Kylo's shuttle landed on the platform where the banners of the First Order move in the wind.

Kylo Ren soon entered a large chamber, a rather impressive throne room, where numerouse officers and processed information without end. At the far end of the huge hall, a.throne faced a large window that allowed a magnificent view of the moutains and the distant volcanoes. Said throne was guarded by six impressive warriors, clad in red armour and helmets.

"The map will soon be delivered to the Resistance." a cruel voice said, echoing through the chamber. The throne slowly turned to face Kylo. Sitting in that throne was Supreme leader Snoke. He looked larger than life, deformed and crippled, wearing a golden robe. "Leading them to the last jedi," Creel said, with a sinister and cruel look. "If skywalker returns, we will face a threat greater than any other in the galaxy."

Kylo didn't say anything, waiting for the supreme leaders orders.

"Come." Snoke said, offering a slight wave of his hand.

Kylo did as he was told and walked closer to Snoke, before kneeling before him. "Master." Kylo said, bowing his head to his mentor.

"There has been an awakening," Snoke said. "Have you felt it."

"Yes" Kylo admitted.

The supreme leader leaned into his throne. "A powerful individual. Unaware of his or her potential. Such natural awakenings are rare. The last time it had occured it happened to Anakin Skywalker." Kylo looked up at the mention of Anakin Skywalker. "We must find this person and harness the power he or she wields. With it, we can destroy Skywalker."

"Master," Kylo said. "I am more powerful than ever before. I will find that map, and then I will seek out Skywalker and kill him myself."

Snoke only chuckled, a sinister laugh that echoed in the large chamber. I admire your confidence. But be careful. Overconfidence was the downfall of the Sith. It was their pride that sealed their doom. We must find this individual and add him to our ranks, teach him the ways of the darkside."

"Then I will not fail you, master." Kylo said.

"Go, my apprentice. You will find this individual at one of the unexplored parts of the galaxy." Snoke ordered, turning his chair around and looked aoutide of his window.

"As you wish, my master." And with that Kylo left to start his search for this strange individual.

Earth, Land of Ooo, a few weeks later:

In the land of Ooo, at the heart of the grasslands, a sweet smell of breakfast floated across the low, rolling hills. Birdsong filled the air as the sun broke the horizion, casting its warm rays across the hills, turning the lingering gloom of dusk into the long shadows, where that night would hide until the sun had banished it completely. They painted the side of a solitary obstruction in the uniform landscape, a thick, ancient tree, tingering trunk and brought with soft, and warm color.

"Hey Finn! Are you up yet?" Jake grumbled, as he used his stretching ability to juggle several items around the stove. "If you don't quite bunkin' around, you're gonna miss breakfast! Get it goin' buddy!"

Jake had always been a easy riser, but it was strange to see his. normally overchaged brother all lazylike. Expecially at his 18'th birthday. Well he was getting older, he thought.

Up in the room above, a muffled grunt emanated from a bundled up lump lying on a bed. The smell of the food, that was combined with the soft song of the birds and the gentle rays of light slipping through his window, was slowly but surely winning the fight against the last wisps of sleep. The bundle turned over once. It grunted more, and then turned again, before finally cracking in half to reveal a form of light skin and a small mess of what could be confused with finely-spun gold. Finn Mertens smacked his lips, stretching his arms out over his head before attempting to rub the sand from the corners of his eyes. After a little bit of absent staring, he cast his blue eyes out the window, wincing a bit as his eyes adjust but otherwise enjoying the sight. A faint, groggy smile curved his lips. That view would never change, and he hoped it would never grow old.

Shaking his head once to try and dispel his lingering lethargy, Finn left his bed, stretching again from his toes to his fingertips, yawning loudly. "Oh Glob…" he moaned, feeling things pop along his back and neck. It seemed that there were always little pops and aches here and there, these days. Usually in the wake of some bump or thump he had received in antics the day before. Finn had no problem with that though. Pain was just pain. He was tough, and wouldn't let a few waking pains slow him down.

Losing his right arm was proof of that.

More than the way he woke up had changed, as the days rolled on. Twelve had become thirteen, then fourteen. Five came into six, six would become seven, and Seven would eventually become eight, but all that future jive wasn't big in Finn's brain. He just kept his head in the now, like he always had. So what if he was doing some shifto-changeo deal? Growing boys grow, and that didn't bother Finn in the slightest. He still had his kind heart, and that was all that mattered in the end.

"Fiiiiiiinn! Come on buddy, it's done and it'll be cold if you don't move your buns!" Jake called, his tone growing even more impatient.

"Hang on bro, I'm on my way!" Finn shouted back, slipping out of his PJs and putting on some daytime clothes. His blue shorts had gotten too small years ago; he slipped into a pair of dark blue cargo pants and put on neckalace with a blue crystal gem that was given to him by his mother before he left Hub island, before tromping down the stairs. His shirt could wait until it was time to head out, but Jake, and his stomach, didn't want to.

Down in the kitch, Jake was done juggling, and had already started digging in. "Take a seat Finn, before I eat your grub for ya!" the hound joked, scarfing down a sausage. "We've got sausages, scrambled eggs, grilled cheese, and just for you, I made ya some sautéed mushrooms and peppers and… Ah… Veggie stuff."

"Veggie stuff?" Finn asked curiously, taking a seat. "We don't usually have lots of veggie stuff. What gives?"

"Finn, I'm a dog. Too much veggie stuff is bad for my gut," Jake said between mouthfuls. "But you're a human, and you need plenty of veggie stuff to stay healthy. You hated it, so I always hid 'em in things you actually liked, but now that you're getting' all grown up and stuff, you gotta take it on your own"

"Hey man, watch it! I ain't grownup yet!" Finn protested, but he was met with Jake's 'really'-look. The human boy relented, at least a bit. "Alright fine."

"Don't worry about it bro," Jake said in reassurance, stretching over to bump Finn on the arm. "Growin' up ain't so bad. Sure you gotta give up some of your little-kid fun, but you get all new grown up fun to replace it! And in the end, you're still you; you still like the same kinda stuff, you just find it in different places."

Finn's smiled up for the brighter, bumping his buddy back with a little leaning. "Thanks dude," he said. "You always know how to set my mind right." With that, the two chowed down on their breakfast feast.

After a bit, Jake comes up for air, and to say, "Man, you got some long arms."

After their munching was complete, the best buds in Ooo moved to the couch to play B-MO while they decided what to do with their day. "Man, I still think we should go see if PB's got something for us. We haven't heard from her in along time."

"Ehhh…" Finn replied, screwing up his face as he attempted to maneuver his game-guy around Jake's fireball attack, screwing up his face a bit more when he was only partially successful. They really didn't know what to do on his birthday. "I dunno. Peebles said she'd be pretty busy these next few weeks. Don't wanna muck up her science buisness, ya know?"

"Yeah, I guess… Haha, now I've got ya. Putrid Cloud, hwatcha!"

"Wha!?" Finn exclaimed in surprise, before groaning as his character coughed on the nasty green fumes, till his health dropped to zero. "Aww butts! That spell's no fair, you can't move out of it!"

"Yeah, well that'll show ya not to keep usin' that cheapo transmoogler hex, the one that turns ya into a cat!" Jake countered.

Finn was unrepentant, if his mischievous grin was anything to tell by. Regardless, their banter was interrupted by a whistling tune coming up the ladder. Marceline Abadeer the Vampire Queen came floating up into the scene, waving her fingers at the couch-riding homies. "What up, y'all? Where's the birthday boy?" she asks, floating up over them with her legs out beside her, like she was reclining on a couch. The way-rad rocker vamp was wearing a pair of black jeans tucked into big black boots with big shiny buckles, and a red tanktop with a big gold flower printed on the front. Her hair was in a simple tail behind her head, her pale arms were covered by long gloves, and a wide-brimmed cowboy hat topped her head.

"Oh hey Marcie," Finn responded casually, waving back. Jake waved too, but he was mostly still occupied with B-MO. "Not much, just trying to plan some shenanigans. I wanna do a dungeon romp, but Jake wants to visit Princess Bubblegum and see what she's up to."

"Man that was just one idea. I just don't wanna do somethin' mega gutbustin'. My gut's still tired from gettin' all busted by that rock golem we fought yesterday." Jake protested, fiddling on with B-MO. Marceline snickered with amusement.

"Aww, cheer up little pup," she said, drifting over to an easychair in the corner, which she draped herself across. "I'm down to stick around, and be your chum while you rest your tum. And in a bit, I'm gonna mosey over to a spot where I think you'll fit right in, Finn." She looks quite pleased with her rhyming self.

"Yeah, that's cool," Jake says, smiling at his friends. "I gotta meet Lady later anyways, so it's all good if you guys wanna do somethin' without me."

The human popped up off the couch, metalic fists raised way, way up. "Sounds cool, Marcie," he says with his usual cheerful enthusiasm.

Marceline eyes Finn then, a bit surprised, but then smirks with her usual mirth. "Groovy," she says, before floating off the easy chair towards the last Human, head first with her chin resting on her arms, like she was lying on a bed. Her nose came to a halt a few inches from Finn's. "Zany guns, by the way," she says to him, her voice filled with teasing glee as she poked his chest with one finger. "Been getting' all buff n' stuff?" She said, noticing his build. Finn wasn't particularly bulky, but he also wouldn't be called slim, either. He sat right in the middle of the body spectrum, lean yet well-muscled. Without much excess body fat to speak of. His body spoke of the years of combat and hardship, with scars of previous battles made clear.

"Huh? N-nah man, my guns are just… Y'know, my guns!" he stammers out in response. He hadn't thought someone'd be showing up, or he would've gotten dressed already.

Marceline laughed a bit, floating around him. "Yeah, sure thing hero-boy, but I think you're gonna want something with a little more cover if you're gonna go handle some biz with me later. Unless that's just what they make armor out of these days."

"Y-yeah… I'm gonna go do that," Finn said, making a quick retreat to his room, his face flushed and his ears hot. Marceline just chuckled, settling into his spot on the couch to ham it up with Jake.

"Man, that kid never changes, does he?" she reminisced, as Jake finally gave up fiddling with B-MO.

"Oh no, Marceline, you don't know the half of it," the little computer said, hopping up to his feet. His screen bears a conspirator's grin. "Sometimes, when he is asleep, Finn dreams about all the adventures he's had. He does not say anything, but B-MO has his ways of knowing."

Both Marcie and Jake gave B-MO a stumped look. But the computer simply put his hands behind his head and walks off. "B-MO has his ways," he insists. The two he left behind just shrug at each other.

"Yeah, growin' up can be rough for him sometimes, but he's still good. That's Finn for you, ain't nothin' gonna bother him so long as his friends are good, and he can go out adventurin' and stuff." Jake stretched his arm into the kitchen to grab some juice. "So I ain't really worried. He's gonna figure things out on his own; I'm a dog, I don't really know too much 'bout how humans grow up. But that's what he's always done, so I think he'll be alright."

"Word up, pup."

With Finn:

Back up in his room, Finn pulled his hoodie over his head. Like the shorts, he'd outgrown his shirt, backpack, and his beloved hat, but with a little help from Ragdoll Princess, he'd made a hoodie of the same color, with his old hat as the hood, and in lieu of the old backpack, he had a green messenger bag, with special loops for swords on the side. These days, Finn mostly relied on his trusty Root Sword; A longer one, that was made for a big-boy like himself.

"Man, what was that biz with Marcie teasing about my guns?"he wondered to himself as he pulled on socks and tucked his cargo pants into his black boots."I mean yeah, they've gotten all stiffer and kinda lumpy, but… Am I really all that different from before?"He scratched at the spot where his vampire friend had poked him, on the left side of his chest. His skin tingled in an odd way.

He thought about it for a few more moments, before shrugging it away."Eh, I'm sure it's just Marcie. Don't think too hard on it man, you ain't too good at thinking anyhow. Just stay cool."

The last human smiled, nodding to himself as he slid his Root Swords into place before rumbling down the stairs. "Alrighty ma'am, we are down to jam!" he exclaimed, taking the bear-hood off over his head. "So what's it gonna be Marceline? Minotaurs? Gorgons? Minotaurgons!?"

Marceline chuckled, always amused by her friend's unending enthusiasm. "Nah, none of that. We're going for the big time, baby." Finn's cheer visibly multiplied, and the vampire queen couldn't help but feel its infectiousness. Being around Finn was like standing in the eye of a hurricane made of excitement, altruism, and gratuitous physical violence. "You, my dear hero-boy, are gonna help me go dungeon hunting. But not for just any dungeon though."

"So, An extraordinary bass, huh? What's so great about it?"

"Well, if what my wad of an ex's journal said is correct, this particular dungeon has strings wound from the beard of Thoros, a powerful Forge-Titan, who lives in a volcano. The journal also said that if you can beat Thoros in a rock-off with it, he'll craft you an artifact of unimaginable power… And, you know, awesome free bass strings for life. Dude's got a mondo-beard."

Finn shifted into his 'somehow dramatic basic deduction mode'. "So you're saying that if I help you find this bass…"

"And if you help me melt his face off with some killer tunes…" Marceline continued.

"…Then he'll give you plenty of beard-strings, and he can make me a romp-whompin' sword!" Finn pumped his fists in excitement. "This is munchin' awesome!"

"You got it," the vampire said, exchanging a high-five that was truly righteous. "Now let's boogie baby, I wanna get there before the sun gets too bright."

"You bet, Marcie!"

And with that, the two paid momentary goodbye's to Jake, and off they went on a shiny new quest.

As they left, Jake stretched his arm to grab a phone nearby. He diald the numbers and the phone rang. "This is Jake, the first part of operation 18 is a success."

A few hours later:

It was near late at night, and the millions of stars twinkled bright above the dark sky.

After their quest for the new Bass, Finn and Marcie where making their way to the Candy Kingdome. Both of them having to fight their way to his lair to get it.

When they walked through the suprisingly empty streets of the candy kingdom, Finn instantly knew something was up. They eventually made it to the Candy Palace and opened it's door.

"Happy birthday, Finn!" Everyone yelled in unison. Simom, the pups, flame princess and many more where there. The Halls were packed with people, cheering for the blonde adventurer's coming of age. Princess Bubblegum brought out a massive cake, a giant Finncake with 18 candals.

"Oh, guys. You really didn't have to do this for me." Finn said sheepishly.

"Of course we did." PB said, with Macrceline floating next to her. "You've done a lot for the Candy kingdom and all of Ooo, so think of this as a thank you gift."

Peppermint butler then walked up to the blonde and placed a small butter in his mechanical hand. "Know, blow out your candals."

Finn did just that, leaning closer to the cake. And just when he held his breath and was about to blow the 18 candals out.

He felt something.

Well he could always feel something, it happened when he was 9 on one of his first adventures with Jake. He always felt like somthing was there always there, this feeling had helped him multiple times during his various adventures and he never told or mentioned it to anybody, thinking it was just in his head.

But this time it felt off, way off. It felt cold and extremely angry.

He stopped what he was about to do, which caused much confusion.

"Hey, bro... Are you alright?" Jake asked his adopted brother, clearly worried.

Finn ignored that question and walked to the halls doors and opened them, and his eyes widened with pure shock.

He saw dozens of ships flying through the night sky, the others where quick to see what was wrong as well. Only to see the same thing the blonde saw.

"What the junk!" PB said, suprised to see these strange ships.

"Evil detected!" The Gumball Guardians said simotaniously, shooting their deadly lasers from their mouth and eyes, hitting a few.

But the strange ships had lasers of their on and easily shot the giants down with no problem whats-so-ever.

All around the Banana guards prepared for battle and the walls around the kingdom where shot down.

The ships landed and the slide and unloaded dozens upon dozens of white armored soldiers with strange guns quickly opened fire.

Finn and the others quickly rushed into battle and the battle lasted for hours but they where quickly outmatched from the advanced armour and weapons.

PB soon found herself held by two of the white armored soilders, Jake and the others where held by a shock collars.

A soilder this time wearing chromed armor and a cloak walked up to her. Finn managed sneaked into nearby cover and watched.

"By the looks of it your the leader of this miserable Kingdom. I am Captain Phasma." Phasma said in introduction.

"Princess Bubblegum," PB said, narrowing her eyes in defience, but it was clear to every prisoner that PB was enraged that not only her kingdom was destroyed, but her precious Gumball Guardins where completely destroyed. "And my Kingdom was doing just fine until you showed up, you butts."

"Really? For the looks of it, we've managed to easily defeat your pathetic soldiers and those giants." Phasma said in an almost mocking way.

"Well, we did defeat some of those bucketheads just for that." PB said smirking.

"Burn!" Marcelien said with pride, but it was short lived as the was brutally shocked by the collar around her neck.

"You and your friends insolence will only give you grief." Phasma warned.

"We're not scared of you." PB replied with more defiance.

"It's not me you all should worry about." Phasma said.

The prisoners and a hidden Finn, spotted yet another incoming shuttle. Large, black and bat-like in appearence. As it landed, its wings folded up and a ramp extended. Then, a figure who wore black robes and a mask with a hood over its head with two of the white armored soilders, exited the shuttle.

From his cover Finn felt that same dark, cold, hate fueled source, but this time it was even stronger than before. Sweat rolled from the blondes temples and he involuntarily shook with slight fear.

The figure walked up to the princess of the candy people and looked down upon her.

"Who the heck are you supposed to be?" PB asked in a rude manner, but deep down she was terrified. But still held her ground.

"Something that you should be afraid of." The masked figure answered, its voice was deep and just as intimidating as his clothing.

"Well that surely isn't working out for you isn't it?"

"I highly doubt that." Kylo said, "Where is the awoken?"

"I don't know." PB said, utterly confused by that question. "I never seen of him or her."

"Oh, I think you have." the figure said. He could still fell a powerful presence around the area, but he couldn't pinpoint the exact location.

"Well, whoever your looking for, your not gonna find him here, tough guy."

"Alright then if you won't tell me where the one we seek is," The figure said, igniting a crimson red cross-guarded blade. It looked unstable, giving it a fiery appearance. "Then this will motivate your friends to..."

Not liking where this was going, and not wanting to sit idely anymore, Finn grabbed a gun from a random dead soilder and shot it at the robed figure.

But the figure instantly deflected the shot with his crimson red energy sword. He reached out with his hand, and to Finn and the rest of the prisoners suprise. Stopped him in his tracks and forced the human down to his knees.

Two of the soilders ran over to the vlonde and hit Finn with their guns, and dragged him along to the robed figure and Phasma. The violently searched him and his bag until pushing him to the ground.

"Nothing sir," one of the soilders said.

The masked figure only bent down and looked at Finn.

The blonde looked at Phasma and the robed figure with narrowed eyes. "Who the heck are you?"

"You... are very strange." the robed figure said, much to Finn's confusion.

With Kylo:

Ever since Kylo's search lead him to this unkown planet he had seen nothing but strangness, but through that strangness he found this short haired blonde, who had the gaul to shoot at him.

He could feel the raw power of the force within this boy, but it looked like the boy never even heard of or attempted to use the force.

So a test was needed.

Kylo stood up and turned to Phasma "Put him onboard" he ordered, turning his head to the shuttle.

"Sir," Phasma said. "What about the prisoners and civilians?"

Kylo barely even stopped to think. "Kill them all."

With Finn:

Finns eyes widened as he looked to see the white armored soilders pointing their lasr guns at the wide eyed citzens and his friends.

He felt completely helpless as the soilders where ready to fire.

Everything felt like it was in slow motion as he laid there helpless, Glob did he hate it. He didn't want his friends to die. But also he didn't want to be abandoned, like how Martin had done to him. All types of emotions hit him at once like a earclops and suddenly he felt something within his body wanting to explode.

"Noooooo!" He screamed from.the top of his lungs, as unknown to him something had happened.

With Kylo:

Kylo was expecting somethimg from the boy, but not like this.

When he heard the blonde shout, he floated in the air for a brief second amd unleashed a huge amount of force energy knocking over a dozen of his Stormtroopers away. If it wasn't for him using the force to block the wqve to protect him and Phasma, they could've been blown back to.

His master was right, this boy was powerful.

"What was that?" Phasma asked, if she didn't have her helmet, she would've been seen with wide eyes.

"The one we searched for." Kylo said simply. "Take him to the ship as before."

"And the prisoners and civilians? Have the orders changed?" Phasma asked, reganing her composure.

"Take the prisoners and civilans to the Empirical for experimentation, this planet belongs to the First Order now." He then walked back into his shuttle with his troops folowing him.

And that's it.Let me know what you think.