Author's Notes: Ok, so this is set after season 2 of the series.

This is also my first fanfic for the series. Normally I wouldn't do OC, but I found that it would fit this series alright. For those of you wondering about my other fics, I can't promise that I'll get to all of them, some really will be have to put under hiatus, unfortunately.

Anyway, I hope you guys enjoy the story ^~^

Prologue

-Darkness Rising-

The day was sunny and peaceful.

A squirrel made its way through the dense undergrowth of a secluded forest.

It scampered up the wooden bark of a nearby tree and jumped onto the next one. Light streamed through the gap of the overhead leaves and it bore down on the squirrel and scattered its shadow everywhere as it continued on its quest.

The creature ran down the tree it was currently on and lifted its round black eyes to stare at the large oak tree infront of it. The oak tree was clearly old in its age, with its roots grown over the soil and its branches completely covered in an odd shade of green, that if one were to see it the first thought that they would have was the word 'sickly.'

The squirrel stiffened, possibly in fright. It was always afraid of this tree for reasons that even it doesn't know. But it was what was standing between the creature and an area filled with nuts, so it chose to venture on.

As it passed around the large snake-like roots, the earth began to rumble.

Suddenly, the dark clouds gathered overhead and lightning struck the tree.

The squirrel jumped back and following its animal instincts, it ran off into the forest, going as far away as possible from the danger it sensed.

Behind its retreating figure, the charred and blackened oak tree was split in half from the impact. Smoke also rose from it, and there were the mild signs of the start of a fire.

Then an ominous figure emerged, cloaked entirely of gold and a black that was darker than any material on earth. All at once the grass around the area shriveled and the trees aged quickly and died with the last remnants of their leaves disintegrating into dust.

The figure walked into the clearing, the soil cracking unnaturally under every step they made. The figure was tall with a large bulky build -a man's build- that was half-covered in soot from the lightning. He wore a long cape that fluttered in the strong wind that now seemed to envelop the area, and an full plated armor with spikes extending outward. A large sword was swung around his side, and a large intricately designed shield was attached to his left arm. Covering his head was a helmet with two pointed horns extending to the sky and a slight opening where his glowing red eyes could be seen.

"Dark Knight, Odin."

A voice boomed, and the figure immediately turned towards the sky. It was cracked and thunder was resounding constantly. But there was an area which was pitch black and contained two piercing green eyes that stared back at him.

The man called Odin knelt down. "Master."

"Rise."

"I have an important mission for you."

Odin did as he was told and dutifully waited for his master's order.

"Bring me the NinjaNomicon."

With that, the dark section of the sky cleared and the knight was left alone.

He unsheathed his sword and pointed its sharp edge directly ahead of him. Lightning rained down from above and hit the area he was pointing at. After it dissipated, a dark horse was pounding its hooves on the bare ground.

The Dark Knight mounted his steed and set off to fulfill his master's command.

Randy Cunningham, 9th grade ninja -although he was already in 10th grade since the new semester started-, was staring blankly outside the window of his school's classroom in total and utter boredom.

"What's up, Cunningham? You look bored man." Howard commented over the sound of himself playing video games in the next seat as his friend continued to mope.

"That's because I am bored." Randy sighed. "Ever since I defeated Evil Julian and the Sorcerer, there hasn't been anything wrong with the Norrisville. I mean except for those people who need help with ordinary things like saving them from falling off a bridge, stopping a mugger or even worse," He shuddered. "Helping old folk cross the streets. That one was just shnasty."

"Well," Howard keyed in several combos that wiped out most of his opponents in one move. "You defeated every single supernatural enemy there is in Norrisville so there's not much left for you to do." He continued on jokingly. "Hey, maybe we don't even need the ninja anymore."

Randy's head snapped quickly to his friend's direction with a stricken and panicked look on his face. "No way! I cannot give up being the ninja. Absolutely not!" Although he said that, he had to admit that Howard had a point. If he didn't have any serious enemies to fight, it was only a matter of time before his powers were taken away from him. And that thought frightened Randy more than anything else. Being the ninja felt like second nature to him, it was like another layer of skin that was too painful to peel off. He couldn't imagine life as just Randy Cunningham anymore.

Completely insensitive to his friend's distress, and because Howard was, well, Howard, he continued on with the topic. "But, no really bro, you are completely useless right now." His game console beeped and on the screen showed a message that read 'You Won the Game' and he raised his fists in victory.

Howard's words stung, and it made Randy frown deeply, but then Howard patted him on the back.

"Don't worry, Cunningham. There are no take-backs in the ninja world." Howard said, as if reading his mind. "At least, I think there aren't. If there are, then you wouldn't still be a ninja right now." He laughed, unaware that it made Randy feel worse.

Randy rolled his eyes. "Gee, thanks. That really cheered me up."

"No problem, buddy." Howard gave his friend's back one final smack before reclining in his chair. "Also, who needs to be a ninja anyway when you're dating one of the school's most popular girls, Theresa Fowler." Howard nudged him.

Randy gave a slight smile. Over the summer, Theresa had confessed to him and the two had started dating afterwards. He had to admit, being in a relationship with her was the complete cheese. She was pretty, nice and fun to be with. He couldn't ask for more in any girl.

Just then the bell rang and their teacher entered the room.

Randy shook his head and continued to stare outside the window as the teacher drawled on and on about history. He disengaged from the lesson and entered his own thoughts about being the ninja.

He didn't have to wait for long, in five hours the remaining days of his life as a ninja would change.

A man in his mid-forties was driving his family to a vacation outside of town. They hadn't gone that far from Norrisville yet and already he was feeling irritated at all the noise inside the car.

He had a total of seven kids, all young and active and jumping up and down inside the vehicle. His wife was flipping the map over and over again and complaining in that whiny and paranoid manner of hers that he took the wrong road even though there was only one road.

The car itself was beat up and spewing gas, which was why they moved very slowly. He could have sworn that a snail went right past them when they were driving earlier.

"Honey, do you hear that?" His wife asked him.

"What?" He gritted his teeth and strained to hear his wife over his kid's screams. A stray toy airplane hit him on the head and he had to exercise a lot of self control not to throw it back at his son.

"I said," She raised her voice. "That- Billy get your head back inside the car!" She screamed at their youngest son who opened the rear-view window and who had his head poked outside. She scolded him again and he entered the car again in fright of her wrath.

"What?!" He asked again as he kept his eyes on the road.

His wife turned back to him and said, "As I was saying, do you hear that sound? It sounds like a horse's-"

She was barely able to finish her sentence when they saw a large figure riding a tall black horse ride past them towards the direction of Norrisville. The figure brought dark clouds along with him and his trails left lightning burns on the road.

The two adults stared at each other.

"Did you just see that?"

"Mommy, that was so cool!" One of their sons piped up. "I want a horse too!"

His wife scolded their son and he rubbed his forehead in frustration.

He really had to keep his family away from those exotic mushroom from Africa that his brother brought over earlier that day, it was causing hallucinations.

The Dark Knight steadied his horse at the foot of a cliff overlooking the town. The wind beat furiously behind him, as if trying to run away. Upon his arrival, he had passed a signboard that said 'Norrisville', which must be the name of the place.

He mused that everything had changed over the course of a few centuries and almost didn't recognize the place anymore. It was unfortunate, but he had to kill everyone in the entire town.

He wondered if the place was still protected by a Ninja.

Well, he would find out soon enough.

Odin cracked the reigns and steeled the dark horse to descend unto the town.

School ended and the two friends made their way around town.

"Ok, we're almost to the arcade." Howard announced as they continued walking. "I'm sure some nice video-gaming will cheer you up."

"Yeah, I guess." Randy replied uncertainly. In addition to feeling down, he was also feeling a bit cold and he didn't know why.

He drew his hands around himself and rubbed his arms to keep warm.

It was then that they heard the sound of lightning cracking and of thunder overhead, and it made everyone turn to the source of the sound.

There, on a hilltop just outside the outskirts of Norrisville, something was running down the side of the hill in a straight line that left behind gold and static-ish trails.

"What the juice?" Randy placed a hand above his eyes and leaned in and squinted his eyes in an effort to see what it was that caused this.

"Randy," Howard tapped him on the shoulder. "I hate to say this, but I think it's ninja time." He crossed his arms and made a face. "I have a bad feeling about this."

Randy agreed with him and then he ran over to the nearest abandoned alleyway, but before he pulled the mask over his head, the NinjaNomicon Glowed and he opened it.

He was sent to another world, where there were various Japanese characters, and then he was in a cave made of total blackness. In the dim light, the words on them read:

The Ninja must learn to retreat,

From that which he cannot hope to defeat

Then he went back to the real world all confused than ever. "What? An enemy I can't defeat? Pfft, what a joke." He said with complete self-confidence and decided to transform into the ninja anyway and investigate.

As the ninja, Randy jumped from roof to roof as he made his way towards the area to investigate. He was partially thankful that something eventful was happening, but also curious as to what it could be this time.

Randy did a back-flip and landed cleanly on an area that was facing the approaching threat or thing, or whatever it was. The area was vast with an array of grass and had an abandoned sort of look to it. But then there was a farmhouse just a few paces away and a river.

The thing stopped infront of him and it caused dust to fly around. Randy coughed a few times and when the smoke cleared, he saw a large black knight riding an equally dark horse. 'This guy doesn't look too friendly.' He thought as they stared at each other in an apparent stand-off.

"Uhh," Randy cleared his throat. "Who are you?"

The knight descended his horse and turned towards him. "Are you the ninja?"

Randy rolled his eyes. "You're supposed to answer me first before I answer your question." He stated.

The knight nodded, "Very well then. I am the Dark Knight, Odin."

Randy nodded to show that he was following, but various thoughts were running through his head. He wanted to laugh at the guy for his outfit, but he was also weary about him because he wasn't sure if he was an enemy or not. One thing was clear though, this Odin guy was a man of few words. Also, that he should be careful around him.

He realized that Odin was waiting so he replied, "Yeah, I'm the Ninja."

The Dark Knight unsheathed his sword and pointed it at Randy.

"Ninja," Odin declared. "Prepare yourself for battle."

'Ok, I cannot say that I didn't expect something like this.' Randy inwardly sighed and took on a fighting stance.

The battle against the darkness was about to begin.

AN: So this fic is a OCxRandyxTheresa sort of pairing. I don't have a fixed pattern of updating, just to be clear. It all depends on reviews in a sense. And also, yeah, sorry if I have any wrong grammars or spellings or something along those lines, I made this and several other chapters over the course of two days straight. I might edit this in the future, but for now, it stays like this.

Kindly, Read & Review ^~^ thanks.