Author's Note: So I was watching Black Clover and it kinda struck me that it was similar to a few other anime I like. The more I watched it, the more I wanted to write two different crossover fanfictions with it. This one is a Black Clover + Fairy Tail one and the other one I'm working on is a Black Clover + InuYasha crossover. Also, may rewrite the summary at a later date once I have a better idea of what I'm doing since as of right now, I'm just writing by the seat of my pants man (blame my elusive muse). Also, I'm gonna make Asta less oblivious.

Rating: M
Pairing: Undecided (Might do a harem, might not. Might not even do a pairing)
Genres: Fantasy, Action, Adventure, Drama

Summary: Originally born without magic, what would happen if some ancient, unknown magic chose Asta to be its wielder? Suddenly thrust into a world of magic, Asta does his best to cope with it and keep moving forward. How will this unexpected change of events shape Asta?

Blanket Disclaimer: I own nothing obviously.

Magical Paradox
Chapter 1
3rd Person Point of View, Omniscient

A boy with spiky ashy silver-grey hair sits on a tree branch, legs swinging in the air. He leans against the trunk of the tree, his bangs swishing on his forehead. A black bandana with a red four pointed star to the side is tied around his forehead. He sighs. 'I thought for sure that once I got my grimoire, I'd be able to use magic for sure.' He frowns. 'I never thought I wouldn't even get one to begin with.' His bright shamrock green eyes glint with determination as he stands up quickly. "But like hell I'm gonna give up!" He roars out enthusiastically. "Don't you dare underestimate me fate! I'll show you! Even if it takes a lifetime, I'll keep working hard until I get my grimoire! I'll become the Wizard King and prove to everyone that anyone can be awesome, even if they're poor or just some orphan! Just you wait Yuno! I'll catch up to you in no time!"

He jumps down and begins training with renewed vigor. Not even five minutes later, he tenses. Looking up, he stares off into the distance. 'Yuno's in trouble.' He frowns and takes off in the direction of his friend and rival. As he nears Yuno's location, the boy hears an older male speaking.

"A four-leaf clover may have chosen you, but you only just received it today. You're still just a little chick boy. How unfortunate for you that I happened to be at the ceremony today. I'm going to end your legend long before it even begins." The man mocks, a smirk evident in his tone. "Hey, that pendant looks like it's worth something too. I'll be taking that too."

"Hold it! Don't you dare touch it! That belongs to Yuno, not you bastard!" The ashy silver-grey haired boy roars out as he jumps from above. He kicks off the wall and lands a couple yards away, skidding to a stop. Dust swirls around his feet and knees. He glares venomously at the man holding Yuno's grimoire. "A grimoire is precious to the person it chooses so give it back!" The man just scoffs.

"Aren't you the pathetic little brat who didn't receive a grimoire today?" He asks.

"Yeah, what's it to you? The name's Asta!" The boy, Asta, growls out. The man laughs, his hand to his forehead. He moves his hair back, revealing a burn scar running from his chin straight up to above his left eyebrow.

"The outside world is a place where crooked deeds like this can be overlooked. But you'll be dead before you can find that out for yourself, boy," He sneers as his grimoire opens up, pages flipping. Settling on a page, it starts to glow.

The black haired boy bound by chains pales slightly. His amber eyes widening, he yells out, "Asta run!" Asta doesn't move. The thief chuckles as barbed chains appear next to him.

"I'm not going to run away," Asta replies, crouching down like a sprinter. "From a disgraced loser like him!" He chargers at the thief, kicking up grass and dirt. The thief moves his arm forward, signalling for the chains to attack. Asta dodges them and jumps up to avoid another one, landing behind the thief and skidding to a stop. Cocking his arm back, he aims for the thief's back, getting stopped at the last second by chains. The force of his punch moves the thief's red cloak. Growling, Asta roars out, "I'm not done yet!" He takes a step forward, the chains pulling at him. The thief smirks sinisterly.

"No, you're finished brat." His grimoire flips to another page and more chains rain down on Asta, slashing him up. "Dance of the Pitless Viper!" More chains stab through Asta, causing blood to spurt from his mouth. His shamrock eyes widen.

'W-what a heavy blow…' He thinks absently. He crashes into the wall behind him, sending a large amount of dust and debris flying into the air. 'So this is the power of the mages from outside of this town.' The thief stalks forward, the chains following him as the slither through the air like snakes. 'I can't possibly beat him with just my physical training. Not with his focus solely on me,' Asta realizes, his head bowed as blood oozes down his face.

"Thank you for the useless struggle, brat," The thief sneers as he slams his foot onto Asta's shoulder, pinning him against the wall.

"No, I'm not finished yet. I'm going to be the Wizard King," Asta whispers.

"You? The Wizard King? As if!" He jeers. "With these chains, I have the ability to find out just how much magical power one has. You, you have none whatsoever! You must have been born that way. No wonder you didn't receive a grimoire; you're too pathetic to have one! To think that there is someone out there like you, someone who lacks even an ounce of magic in this world where magic is everything. What a priceless find!" He laughs. Asta's eyes widen.

'What? What the hell? Then...does that mean that no matter how hard I try, I will never be able to use magic?' His eyes darken as his fingers twitch.

"To think that someone so pathetic existed, how amusing. You won't even be able to find a job, let alone become the Wizard King! I'm sure your friend, the great genius over there, mocks you too," The thief jabs, grinding his foot into Asta's shoulder.

'Maybe he's right.. Ever since that day..Yuno's been distant and refuses to even talk to me unless it's to insult me,' Asta muses. 'Yuno's so amazing that he was chosen by the four-leaf. I'm just…'

"You can't do a thing in this world. Just give up on everything. You were born a loser!" The thief roars out. Asta's eyes start to drift close as he begins to accept what the thief is saying.

"Oi!" Yuno grunts, catching the thief's attention. "Who are you calling a loser? Asta, it's true that you won't be able to become the Wizard King, no matter what."

"You hear that? Even your friend is telling you it's impossible!" The thief sneers, contempt clear in his voice.

"That's because I'm going to become the Wizard King!" Yuno declares.

"Eh?"

"He's no loser," Yuno growls out, glaring at the man. Asta's eyes open. "Asta's my rival!" He looks up, his bright green eyes bright once again.

"Huh? Him, this pathetic piece of trash, your rival? This brat who has no magical power whatsoever?" Asta reaches up, his arm trembling as he grasps onto the thief's leg, causing him to look down at Asta.

"No, not yet." Asta glares at the man, his grip tightening on his leg as he pushes it away from him, causing the man to stumble back with a gasp. "Sorry you had to see me so pathetic looking Yuno. In just a second, I'm going to kick this guy's butt!" His shamrock green eyes burn with a fierce, fiery determination. Brief flashes of him with glowing red eyes and a black marking around his right eye cause the thief to tremble in fear.

"You are worthy of my power boy. Use it well," A reptilian voice whispers in Asta's head as two books appear before him. The one to the left is dirty and shabby looking, the black five leaf clover on the cover barely visible through the dirt. An ominous red glow surrounds the book. The other one is in much better shape. The cover of the book looks to be made of black and blue scales while the binding of it is a silverish color that looks like bones. The symbol on the front of the book is a white dragon with its wings spread out and a crown hovering over its head. Asta's features change with the appearance of the second book. His pupils become slitted while his eyes become more angular. Fangs peak out from his lips. His ears become slightly pointed and his hands gain claws. He grows 12 or so centimeters.

The thief stares at the boy, his chains disappearing. He unconsciously backs away in fear. "How in the hell can a pathetic brat like you have two grimoires?!"

"Gri..omres?" Asta mumbles.

"I knew it. There's no way that Asta wouldn't have been chosen!" Yuno declares proudly. Asta's shabby grimoire opens, flipping to a page. A sword peaks out of the five leaf clover grimoire. It comes out of the grimoire, floating in the air. Asta looks at the other grimoire, remembering the voice he heard earlier as the two appeared before him.

'What does that one do?' He wonders. He is snapped out of his thoughts when the sword slams down into the ground before him.

"But you didn't even have any magic within you! What in the world are those things?!" He cries out in fear. His eyes zero in on the symbol on the ominous grimoire, paling at the sight. 'A f-five leaf clover! Within a five-leaf clover dwells a demon!' He backs away further, his grimoire falling to the ground at his feet. Asta stands up, grabbing the sword.

'Asta's always been that way; he's always done the unthinkable. He always has before and he's doing it now,' Yuno thinks with a smile as he remembers the time Asta got his pendant back for him and the resulting promise they made to each other.

"What is that sword? What are you?!" The thief screams. Asta merely lifts the sword up. "You little wretch with no magical powers, die!" Magic surrounds the thief and a large number of chains attack him.

"Pour your mana into the sword boy," The different voice from before commands in Asta's head. Lifting the sword up, Asta does as the voice commands, pouring the foreign energy inside of him into the sword. The sword gains black flames around it as his features take on a more draconic appearance, scales appearing around his neck and forearms and his fangs sharpening. Small, black horns pop out from his hair. He slices through the chains, black flames racing up the dissolving chains toward the thief.

"H-he nullified my magic?! What the fuck is that thing and those flames?!" He shrieks as they get closer. The flames surround him, burning him. He screams in agony as he passes out. The flames disappear, revealing his burned body.

The flames engulfing Asta's sword disappear, and his features revert back to how they looked once he received his grimoires. He glares at the man's unconscious form. "All my life I trained and trained, building up my muscles since I couldn't use magic. I never gave up. I will be the Wizard King." Asta points his sword at the thief, an ominous aura of black and red surrounding him.

"Asta," Yuno calls out, smiling softly. "Thank you." Asta smiles in return.

"Yuno, I finally got my own grimoire and not one but two of them!" He grins widely, his excitement palpable. He scratches his head. "I'm not sure how to use my second one really but I will! I'm going to train and get better! I won't let you pull ahead Yuno!" Yuno smiles, his brow slightly furrowed.

"You saved me once again Asta." Yuno starts walking away. 'But how can you have two grimoires? That's never happened before…' Yuno thinks. Shrugging it off, he continues, "I'll repay you for both someday. Asta," Yuno stops, turning his head to look back at Asta. "Do you remember our promise?" Asta grins, his fangs flashing.

"Of course I do! I thought you forgot it with the way you've been treating me!"

The next day

Asta grunts, sweat trickling down his forehead as he does one handed push-ups, his body ramrod straight in the air. "1,997, 1,998, 1,999, 2,000," Asta mutters, his jaw clenched as he concentrates on keeping his balance. He pushes off the ground with his hand, flipping through the air and lands in a crouch. Wiping the sweat from his forehead, Asta chugs some moguro leaf juice, a green and bitter liquid.

"I'll learn how to use my second grimoire no matter what!" Asta exclaims, going back to training. An amused chuckle slithers through his head.

"While the enthusiasm is refreshing, you're going about it the wrong way. You'll never be able to use my powers at their full potential, or at all really, if you keep going at it this way," A dark voice whispers in his head. Asta frowns.

"What am I doing wrong?" He asks, frustrated.

"Yes, you need to have a strong body to use my power, but you also need strong instincts born from fights, from life or death situations. While your instincts are better than some and animal like, they are nowhere near what is needed to wield my power," The voice replies.

"Then what do I need to do?" An ominous chuckle echos in Asta's head.

"You need to fight something that will put in the situation where those instincts will be honed boy. If you want, I could train you. It might prove to be interesting and alleviate my boredom."

"Train me!" Asta demands. The impression of a feral smirk appears in his mind.

"Very well, boy. But I'll only do it if you're prepared to die." Asta nods, determination clear on his face. His second grimoire begins to glow. Asta's eyes widen as the world around him shifts and warps, his body lifting up off the ground.

Suddenly, Asta crashes into the ground, landing in a haphazard heap of limbs. He groans in pain, his head spinning at the sudden changes. Once his eyes focus, the boy gasps at what he sees before him. Rocky terrain surrounds him. He is on top an enormous mountain, reach far into the sky. Far below him, he can make out various types of trees. Hearing heavy bangs, he looks down. He spots a lumbering animal about thirty feet or so below him. Large black spikes protrude from its back. It is covered in dark brown and red fur and walks on all fours. A large, spiked tail swishes on the ground. Large fangs protrude from its mouth, greenish-black liquid dripping from its parted maw. Upon making contact with the ground, it sizzles and burns through it. Black talons gleam from the creature's paws, long and deadly.

"Are you done admiring the view boy?" A dark voice questions. Asta spins around, his eyes landing on a figure before him. A muscular, scarred young man stands before him. His spiky dark blue hair reaches his hips. His dark green eyes bore into asta, an amused smirk rests on his face. He wears a black cloak pinned together by his shoulder. It reveals the right half of his torso and arm, blue markings standing out against his dark skin. Sharp red claws sit around his neck. He wears baggy black pants. Asta can feel the enormous power radiating from the man.

"Who are you?" Asta asks, wary of the man. The man smirks.

"Huh, your instincts are better than I thought since you can sense the danger from me boy. My name is Acnologia. I'm from a world that is different than yours."

"A world different than mine?" Asta asks, tilting his head to the side. Acnologia sighs.

"I come from a different world than you. Long ago, before even I was born, our two worlds were connected and shared powers. However, something happened that separated our two worlds. The world I'm from is called Earth Land. The magic I had when I was alive was Dragon Slayer Magic. However, I died and was sent here to repent for my sins by some Dragon God. He turned me into a damn book that would only respond to someone worthy of its power. He also gave me Dragon God Slayer Magic that I don't even have full control over." Asta gawks at Acnologia.

"If that's true, how the hell do I even have your book?! I wasn't born with magic!"

"Don't ask me. My book judged you worthy. I didn't have a say in the matter. But you are rather interesting so I don't mind that much," Acnologia mutters. "Now kid, you're going to fight that beast down there."

"WHAT?!"

Author's Note: So it's been a while since I've read or watched Fairy Tail but I swear I remember something about Acnologia being able to consume any element due to him having killed so many dragons and bathing in their blood or something like that. Also, it was never (from what I recall) revealed which element he uses in his casting. I originally toyed with the idea of creating an OC for it but ultimately decided against it; so I chose Acnologia instead of going for Igneel or another dragon like him. I wanted Asta to grow stronger while still staying somewhat true to his character as portrayed in Black Clover seeing as his anti magic is a large part of him. Also, since his Dragon God Slayer Magic is from a different world/universe, anti magic has no effect on it. Also, I did read a few Black Clover crossovers due to my curiosity. Some were good but I wanted to try to take my story in a different direction but I don't know if it will work out like I want it to.

Word Count: 3,221