Adventure time and Shadow of mordor or Shadow of war.

Billions of years ago, before the Mushroom War, there was an Elf, but not just any elf he was Celebrimbor the greatest smith of the second age. The one that helped forge the Rings of Power with Sauron and died keeping the rings where abouts a secret, costing him his life. Soon Years after Sauron was defeated a ranger of Gondor named Talion was killed along with his family for a blood sacrifice for the return of Celebrimbor, but fate the cruel yet fair mistress had other plans and Celebrimbor chose to share Talion's body. Together with the help of rebellious orcs, Elves, men, and dwarves they fought against the forces of Sauron's growing army and saved Middle Earth for another thousand years and during that time the ranger found love in again in the form of a warrior woman named Lithariel. Talion asked the wraith to lift them from his curse and the wraith agreed giving Talion his life once more. The ranger and the warrior had a family together and lived in peace. But Talion in his old age and Celebrimbor knew this peace wouldn't last forever, so in secret they forged a new Ring of Power, one not made with Sauron's influence, making a nearly perfect ring to combat Sauron and his forces. Soon the races scattered from each other and soon man advanced in technology and science, replaced magic. This proved to be man's downfall as they were soon at war with each other, creating the Great Mushroom War and destroying half of Middle earth. This resulted in very few humans surviving the ordeal and with it the history of Middle Earth. And while the strength of Middle Earth which was now called the land of Ooo fell, Saurons forces began to grow again, waiting for their chance to rise again. He was returning and no one could stop him.

Thousands of years later in the land of Ooo.

"Gasp!" A rush of cold air ran straight through Finn's body as his eyes snapped, only to stare at the midnight sky. A million bright stars twinkled upon him, the bright moon casted an eerie glow across the ruins of Candy Kingdom floor. Confused and dazed with his vision blurry, he tried to stand on his own before he fell and stumbled on his knee's.

"Jake? PB? Marcie? Anyone?!" He tried to call out as he managed to regain his lost footing.

He grunted as he grabbed hold of his chest. Sure he was tough and had a high resistance to pain, like this was nothing to what he's been through, but he sadly wasn't invincible and could still feel sore from time to time. When he finally got hold of his footing, he looked down to notice that the entire right sleeve where ripped off of his dark blue henly top under his green fur lined vest, exposing his cybernetic arm made entirely out of Carbon metal that reached his bicep. (Imagine Edward Elrics metal arm but to past the elbow). He wore a arm bracer and wolf fur for a fingerless glove on his left hand and his right had briwn fur on the metalic forearm and grip bandages that covered all but the metalic fingers. His brown fur trimmed cloak that Raggedy Princess made for him for his birthday was now torn and frayed at the bottom edge. His blue cargo jeans were tattered at the ankles, brown cloth bandages where wrapped around his shins, ankles and instep and his brown tactical boots. His hip pouches where perfectly intact and a green sling bag with a small phone in the strap with a handmade sheath sewn into it. His trademark bearhat was gone showing his braided blonde hair and the hairs on his chin.

As he looked, he noticed something odd as the world around him seemed to flicker and wave like flames. Distorting and obscuring the images of buildings in ruins and some on fire. It was both beautiful and very strange, and even though Finn has seen many messed up things 'this' kinda frightened him.

"Where the heck am I?"

He then began to look around this strange and distorted world moving forward, before his foot kicked something on the ground and made him look down. Down on his feet was his now broken Root sword. It's blade was broken half and had a dagger like appearence. It was stained in an ink like substance, as he bent down to pick it up he stared at his own reflection. And in an instant his head began to hurt as the world once again shifted and changed.

*Flashback images*

Images and flashes went through his head, he struggled to piece it all together. Candy Kingdom citizens panicking and running through the streets as huge chunks of fire and stone was shot into the sky killing most. He still remembered the faces of his hideous and with jagged teath but he did remember they were dressed in armor painted in red, they captured and even eaten some of the Candy people. Even with the combined might of Marceline, Jake, Finn and the Bannanna gaurds they had extreme difficulty fighting back, the magic the envaders used was so dark and powerful that it curroupted the Gumball gaurdians and turned them against the kingdom. And finally he remembered nothing but darkness and the feeling of a sharp object coming through his back.

*Flashback end*

Finn only rised up with the broken sword as he remembered what had happened and he asked one question that now plauged his mind.

"Am I dead?"

"You are banished from death." Finn screamed and spun around in shock, holding his broken blade as he tried to find the origin of the voice. But all he saw was a wisp of blue flames dissapear as soon as he saw it.

"Who's their?!" Finn asked/demanded as he searched for the voice swinging his broken blade.

"Like you young one, lost and confused..." A ghostly figure the began to take shape as it stared at the boy.

This ghostly figure was that of a man. His face looked old and rotted like that of a corpse but he held a deep scowl as he glared slightly at the boy. The figure glowed white and blue while clad in armor that glowed like a white light. He had long black hair with pointed ears and a crown like head band across his head. His back had a quiver with arrows and small amount daggers on his chest.

"Then what happened to me?" He asked as the ghost walked over to him.

"You have been slain, you died in battle before your friends could escape the attack."

Finn of course only groaned as being dead kinda sucked, but he still felt hus heart beat and air go through his lungs.

"Wait. So if I died, then how can the ol' heart still be working?" he asked the ghost.

"Did you not hear me when I said you are banished from death? Now you've been cast aside between the worlds of light and dark. A curse now binds us together to walk to walk this land for all time." Finn's eye's widen in suprise at this.

"But this land can be saved, You have been chosen to Save this land from an ancient and powerful evil, and only by stopping it can we be free of our curse." He said as Finn turned around to face the wraith.

"Chosen... by what?" He asked.

"By that ring on your finger. It holds an ancient power within. But the rest I cannot remember." He then pointed to the ring Finn's mom gave to him as a goodbye gift before he left the island. Finn looked at the silver ring on his left index finger as it began to glow a bright blue with runes he couldn't understand, but he felt a power course through his body.

And as soon as he knew it he was back at the mortal world, he then picked up a red two-handed handle he then pressed a button and activated it bringing out a blue blade that looked like a saber but was big enough for his size. This was the 'hardlight' saber, a energy sword who's blade was as hard and durable as a regular blade but was razor sharp, PB made it for him after his old sword got destroyed. He placed the hilt to his waist and his 'dagger' in his sling bag sheath and wondered in the ruins of the Candy kingdom.

He began to wonder around the streets seeing nothing but destroyed buildings and red flags that had war symbols, just how long has he been dead for? As Finn took another step he heard.

"MAGGOT!"

A snarl reveberated in Finns ears like pitched Swill both angry and Fierce like. For a solid second he wasn't sure what he was looking at, or if iit was real! He remembered fighting these creatures before his dying moments but now... now...

It looked like something fresh out of a nightmare.

He found himself staring at a gang pf creatures that were neither human or monster, but some Strange mix between the two. Creatures with dark skin, some a ruddy type of yellow, others green, and some pale white and light blue. But they all wore metal armor clad in dark crimson red.

The leader of the group leered him a sticky glower, exposing it's jagged pale white teeth and bright, piggish eyes.

"Looks like we missed a Ranger during the Siege boy's." It snarled, brandishing an iron cleaver. "An easy mistake to fix."

"Ranger?"

He could only imagine, He looked quite a sight with his tattered Cloak and ragged clothes. But a Ranger?

What in Globs name was that?

"Orcs." The wraith spat the word in Finn's ear, circiling around him with a snarl, his words finding him in the time it took a man to blink. "You'll find this land infested with them, and those they have broken. They don't understand that times have changed; but you are still a fierce warrior."

And with a wave of the wraith's hand spectral bow then appeared in Finn's left hand.

"Use my bow, young one." He instructed. "Let it smite our enemies."

He did.

Despite never using a bow in his life, Finn watched mystified, dumbfounded as time slowed down and he expertly selected an arrow from the ghostly quiver on his back, and fired.

He kept firing until all but the leader where slain. The leader squaked in suprise and tried to run. But Finn shot his leg, pinning the Orc down.

"Go to him." The wraith instructed him.

Finn did.

As Finn walked up to him he placed his hand on the Orcs face. They looked through his mind, demanding that he tells them if Finn's friends survived the siege.

The Orc told them that any survivors were reported moving to the North. And with the information, Finn let him go to flee in terror.

"Then North we shall go."

"Yeah, if we can trust a word he said."

"Trust has nothing to do with it. His thoughts cannot lie."

They then heard a horn like alarm. And not wanting to die again, Finn snuck his way out of the fallen kingdom and headed to the North.

Finally. Leave a review and give me more ideas of how Finn should interact with the Uruk's, his friends and the kingdoms under Orc control. Finn is nineteen.