Disclaimer: I do not own any of the anime/manga/movies/etc. that I write about; otherwise I would be a millionaire NOT writing on fanfiction publishing my own ideas.

Here's something that I've been wanting to see in Naruto/Fairy Tail stories but rarely, if ever, see. Ones where he's a Take-Over mage! You'd think there'd be more of those out there but that is not the case. So here's my proposal: Naruto was an orphan who was picked up by the Zeref followers and sent to the Tower of Heaven as a child. In this he's Natsu's age and looks up to Erza as a big sister (due in part to her resemblance to his mother). This Naruto inherited the family's magic which is Take-Over: Tailed Beast where, as the name suggests, his Take-Over allows him to transform into any of the 9 Bijuu and have their respective powers. He's also able to control the size and power each form possesses so he could be human sized or dragon sized depending on the situation. This magic also gives him the latest Sage Mode he has in the manga which gives him access to all the Bijuu's powers while maintaining human shape (this form won't be unlocked until later, like during the fight with Jellal in the Tower of Heaven Arc). Naruto largely keeps his mind/personality when he uses the Take-Over due to it being an inherited magic, but also gets more bloodthirsty (like Mira's Satan Soul). Now when he's kept as a slave the dark mages use a magic-suppressing collar around him that prevents him from performing any Take-Overs, which is broken during Erza's riot and he uses Shukaku's sand to protect Erza and Rob.
Later, when Jellal goes crackers, Naruto uses his sand again to try and protect Erza but gets blasted out of the tower with her (his magic isn't as strong as it could be due to him both being young and inexperienced as well as being weakened from not using his magic for a while). Naruto and Erza are both taken by Rob to become Fairy Tail mages and they become known as the 'Monster Duo' due to Erza's strength/personality mixed with Naruto's beast forms. I was thinking for pairings it could be Naruto/Lisanna while Lisanna treats Natsu as a brother (thus leaving him open for when Lucy joins). Honestly I'm surprised not many stories have plots like this because I'd figure people would be all over this idea.

Let me know if you'd be interested or if you know someone who may be interested please! Here is a small idea for a prologue to appease the masses. If no one takes the idea in one year's time, I may have to write it myself because I really want to see this done in some way. For now though, I'm hoping an author with way more talent than myself when it comes to writing stories would give it a shot. Reviews and PMs are welcome and encouraged, while flames will be used to feed my s'mores addiction. If you want to do this story, please contact me and we can iron out the details.
Thanks and enjoy the sample prologue!

Prologue

Erza stirred as she heard shouting coming from outside her prison cell. 'They must be bringing in a new prisoner,' she thought bitterly. The nine year old redhead got up and stretched her aching back from sleeping on the rough stone floor. It had nearly been a year since she and Simon were kidnapped from their village and forced into slavery by the Zeref worshippers, and it still didn't get any easier hearing more and more people being brought in to work on the damnable tower. The Tower of Heaven…what a truly ironic name. Tower of Hell is more like it. She sighed as she noticed the other kids, Shô, Wally, Millianna, Simon, and Jellal, slowly started to awaken to the cries as well. Grandpa Rob was already up, looking at the bars of their cell with a bitter look on his kind face.

"Get in there you!" came the gruff voice of one of their jailors as a small form was booted into their cell.

Rob, being the caring person that he was, went over to look at the new cell-mate while Erza watched in both concern and curiosity. What greeted her eyes was a young boy, about two years her junior, with hair so bright a yellow it almost hurt her eyes to look at in such a dull place. He also had three whisker-like marks on both his cheeks and some sort of collar placed around his throat while also wearing similar garb to the other prisoners. Once the boy opened his eyes, they were shown to be an electric blue color. The boy groaned as he attempted to sit up, with Rob helping the boy get into a comfortable position.

Once the boy started looking around and took note of his surroundings. He asked in a scared tone, "Wh-what is this? Where am I?!"

Erza couldn't help but fill a stab of pity for the child. He was younger than she was when she was brought to the tower and it looked like the boy had even less understanding of what was going on than she did. She noticed Rob explaining the situation to the blond child in a calming manner, as to lessen the situation they found themselves. After the elderly man was done explaining what was going on, Rob started introducing the new kid, whose name turned out to be Naruto, to the others one at a time.

"And this, my boy, is Erza Scarlet," Rob said while pointing out the older girl. Naruto took one look at the redhead before his eyes went wide and then they started to water. Before the group could ask Naruto what was wrong, the whiskered boy gave a flying hug right into Erza's stomach, causing both children to fall to the floor and startled everyone who was watching. Erza was about to yell/scold the child when she noticed he was sobbing into her tattered shirt and hugging her like she was the last person on Earthland.

"M-mamma!" the boy managed to gasp out between his cries, causing all those in attendance to look both shocked and confused at what was going on. After Rob was able to pry the boy off of her and ask why he called Erza mamma, Naruto looked shyly at the girl and said, "She looks a lot like what mamma looked like, before she went to sleep last winter."

While initially confused by the statement, Erza and the others learned that Naruto was an orphan whose father died shortly after his birth while fighting a powerful dark mage while his mother, who apparently looked strikingly like Erza, raised Naruto on her own for most of his life before succumbing to illness the previous winter. Naruto had been left at an orphanage before the Zeref worshippers came and attacked the village, where he was taken in the aftermath. Despite his sad past though, Naruto proved to be a bundle of energy, getting along well with the other children easily (Millianna especially because she said his whisker marks made him look like a "kitty-kitty") after the initial awkwardness was over and was even able to cheer up some of the more depressed slaves.

Though as it turns out, there was more to Naruto than meets the eye. It was about a week after he'd become a new member to their little "family" and Rob was entertaining Erza with his stories of magic and guilds that existed in the outside world. Naruto was sitting nearby when Erza turned to him and asked, "Hey Naruto, doesn't magic sound so amazing? I hope I can learn it one day!"

Naruto grinned shyly at Erza. After the initial confusion on the first day, Naruto had come to accept the fact that Erza wasn't his mom, but he still insisted that he could call her "Big Sis" like Shô and the other younger kids, to which she agreed. Still though, the boy always acted shy around the redhead, and often protective of her. Most likely this was due to the resemblance she held with his mother, though he also insisted that she was family and he'd be there for her.*

"Yeah Big Sis, magic is pretty amazing. It's a shame I can't show you mine though," he finished glumly.

Erza's and Rob's eyes went wide momentarily, before the redhead was suddenly almost nose to nose with the blond, causing him to yelp and fall back on his bum. "You know magic?!" Erza asked in both excitement and curiosity.

"Y-yeah," Naruto stammered out, before getting into a sitting position, "Mom taught me some magic that she said her parents taught her and their parents taught them. I can use it pretty good before I was brought here. Once those bad guys saw I could use magic, they knocked me out with some kind of sleeping spell and placed this collar on me," he gestured to the heavy collar around his neck, "and now I can't use my magic anymore."

Rob took a closer look at the collar and frowned. This was a crude job, but effective. The collar was designed to block a person's ability to focus their magic to form any type of spell, and the best way to remove it was either with the key to the lock or a high enough concentration of magic from both sides of the collar. Unfortunately, the old Fairy Tail mage lacked the magic to be able to help the boy, due to the abuse his body had gone through ever since he was captured by the cultists. Erza pouted at not being able to see any magic but accepted that the situation was out of her hands, though she did have Naruto promise her to show her his magic if the collar was removed.

Time Skip

"BIG SIS!" Naruto and Shô cried out in horror as a beaten and bloody Erza was thrown into their cell by the cult members. Earlier, the kids had discovered a possible escape route but they were caught before they could even attempt to escape. Erza was pinned as the leader of the attempt and was taken away by the jailors. Jellal had been able to break out of his cell shortly afterwards to try and rescue his fellow inmate, but neither where seen for over a day. Jellal was still nowhere to be seen. The kids and Rob went over to the young girl to help her, and they were shocked and horrified by the damage she had on her body. The worst seemed to be in her one eye, which was covered in a rudimentary patch, but it was clear she'd most likely lost it.

Naruto and Rob were trying their best to help the girl with her injuries while Shô started crying. One of the jailors came in to shut the crying child up when suddenly, Erza sprang into action. She was able to overpower the jailor and arm herself, freeing the cellmates in the process. The guards saw what was going on, but Erza was like a force of nature. It was then that she turned to the other prisoners, who were watching in awe, and shouted out that they needed to fight for their freedom. This in turn inspired the other prisoners, who were starting to be freed by the other kids, as they took up weapons themselves and started overpowering the other guards. Meanwhile, Naruto noticed on of the unconscious guards had a certain set of keys attached to his belt…

The rebellion had torn through most of the tower at this point, and it looked like freedom was assured, but then tragedy struck.

"IT'S THE MAGIC WEILDERS!" One of the former slaves shouted as cultists carrying staffs and wearing elaborate clothes suddenly appeared. The magic wielders started casting fireballs into the fleeing crowd, causing many to be too injured to move. Erza watched in despair as the other members of the rebellion started to lose their will to fight. It was then that the magic wielders turned their attention to the girl, firing high powered spells well past the point where she could survive.

Erza looked at the incoming spells in fear before her vision was overtaken by a man's bare back with a black tattoo located in its dead center. She watched in horror as Rob stood in the way of the incoming spells, but before they could contact with either targets, there was a loud roar. The roar was followed by a shout of, "SAND SHIELD!"

Just then, there was a tremendous explosion as the spells detonated. When the smoke cleared, Erza fully expected that either she or Rob was dead, but all she saw was a wall of sand surrounding both the young girl and the old man. Erza blinked her one good eye and tried to find the source of the sand, and was shocked at what she saw. Standing nearly as tall as the ceiling was what could only be described as a monster. The monster took the shape of a tanuki covered in sand that had swirling blue marks covering its entire body and a long bushy tail. The beast's eyes were a piercing yellow with a star like pattern for the center and had black sclera. Its jaws were full of razor-sharp teeth and its claws on its hands and feet were like knives.

Before the other slaves could panic further at the appearance of the monster, its arms lifted up and made a sweeping movement while roaring out, "Sand Wave!" and a large wave of sand appeared, knocking all of the magic wielders down and rendering them unconscious. Some of the other guards tried to attack the creature's back but the sand tanuki made an arching motion with its tail, knocking the attackers into the opposite wall, out cold. Erza was wondering what the creature was when she noticed the broken, familiar collar lying not far from where the monster originated from. "N-Naruto?" she asked hesitantly.

The beast turned towards her and gave a toothy grin, which by itself was really, really scary and said in its rumbling voice, "Hey Big Sis! I told ya I'd show you my magic when I got that collar off! Say hello to Tailed Beast Take-Over Level One: Shukaku!"

The former slaves took a moment to collect themselves, but soon they were starting to cheer and rally behind the Take-Over Mage as they started to sweep through the opposition. It wasn't without its cost, however. Before they could fully push forward, one of the still conscious Magic Wielders fired a spell at the fleeing group and it his Simon directly in the face. As Millianna, Wally, and Shô tended to the large boy, Erza glared at the magic wielder and shouted out, "You won't hurt my friends ever again!"

With that, the redhead's magic started to form around her as the discarded weapons the guards had lost started to float around her before they flew at the mage and knocked him clean out. Rob looked on with both shock and pride as his kids whipped out any and all opposition the tower threw at them. Both Naruto's sand and Erza's blades tore through the cultists with ease, none came even close to touching them. Finally, they were able to make it to the docks where the ships were located at. Rob was loaded onto the one ship with the sick and the elderly while the kids and the younger adults went on the other.

Before their ship took off, Rob noticed the other ship wasn't ready yet and Erza was running back to the tower. "Erza! What are you doing?!" the Fairy Tail mage shouted in a panic.

"Jellal's still in there! I've got to get him out! Don't worry Grandpa; I'll be sure to be on the last ship out!" Erza shouted back as she ran towards were the dungeons of the tower were located at. Nobody noticed a sliver of sand following after the running girl.

Scene Break

"W-why, Jellal?" Erza muttered weakly as she stared at her former best friend. The blue haired tattooed boy gave her a sick grin as he stepped away from the guards he just killed.

"Because the only true freedom we can have is the freedom Zeref can give us! All other forms of freedom are only a temporary lie that people delude themselves with. Join me Erza! Together we can complete the Tower and give everyone true freedom!" Jellal said as he held his hand out to the girl.

"Jellal, this isn't you! Come on, snap out of it and let's get out of here," Erza begged as she tried to reach what was left of her friend and not the deranged lunatic he now was.

Jellal sneered, "So that's your answer then huh? Fine. If you want your freedom so bad, I'll give it to you. However, I'll be keeping all of your little friends to help me finish the Tower. And if you ever come even near here again, all of their lives will be forfeit. The same goes for if you tell anyone else about this place, because it'd be inconvenient for anyone else to learn of what I'm planning. THAT'S your freedom!"

With that, dark energy started to gather around the boy as Erza stood paralyzed. Before the magical blast could make contact, however, a wave of sand moved in between the two children and took the blast in Erza's place. Unlike before though, the sand was unable to fully stop the magical blast and it knocked into her, causing everything to go black.

She didn't know how long she was out of it. Minutes? Hours? Days? All Erza was aware of was the sound of waves and the feeling of sand underneath her bruised face. Opening her one good eye, the new mage noticed she was on a beach of some sort. Looking around, there was no trace of the Tower, so it was safe to assume she wasn't on the island anymore. Just then, she heard a groan beside her. Following the noise, Erza gasped as she saw a beaten Naruto beside her, a burn mark in the center of his chest.

Remembering the wall of sand that tried to defend her from Jellal's blast, she realized. "Naruto, it was you. You used your body to defend me," Erza said tearfully as she reached down and picked the smaller child up gently. The injuries weren't serious on the Take-Over mage, probably due to his tanuki form's sand body, but it was clear he was exhausted. Erza, showing a display of strength unheard of in a girl her age, carried the unconscious blond away from the beach.

The redhead knew Jellal would make good on his promise if she tried to return, and if she told anyone. The best she could hope for was to look for a place that she and Naruto could put the horrid memories behind them. And she had just the place in mind too. The place Grandpa Rob often spoke of, where everyone was treated as family.

Fairy Tail.

*- No Erza and Naruto aren't being paired. Naruto just has a protective nature about him, especially to those he considers friends and family, and to him, Erza is both.

Hope you enjoyed! There may be one or two more Naruto/Fairy Tail challenges with preview chapters coming soon so keep an eye out. Again, if anyone's interested in doing this please PM or ask in a Review. Thanks!