~ Curiosity killed the cat but where human beings are concerned, the only thing a healthy curiosity can kill is ignorance - Harry Loryane ~

Bold - Italian/other languages if stated so

Prologue : One Sacrifice Will Never Be Enough

Alvarez Empire Arc

Lucy Heartfilia(Age - 25)

Tears dripped down her face as she stared at what used to be the key unlock the gate for Aquarius to be summoned to Earthland. Aquarius had been passed down from her mother, the spirit had been unhappy about that decision. This could be seen by how many times the bluenette had washed her away with her water magic. But still, she had stayed by her side and despite being quite cold, she still saw the mermaid as a mother figure, said mermaid was the one who took care of her after her mother died. Now, her key hung dead on her silver necklace, the bottom half missing.

She raised her chocolate-brown eyes slightly higher, now staring at another golden key. A broken golden key. This time, it was the key of Capricorn, he, too, used to be her mother's celestial spirit and right-hand man. But, unlike Aquarius, he had not been cold, though a little too formal, he had been quite happy to his key back in a Heartfilia's hands. It was because of him, and of course, many other of her spirits, she had been able to conquer Celestial Spirit Magic(CSM); she now wielded both holder and caster version of said magic. It was also because of him that her nickname 'Princess of The Celestial Realm' solidified. But now, his key now laid in her palms, it's bottom part shattered and had dug into her skin, covered in the dark ruby liquid that was her blood.

How and why did she break a key to summon the Celestial King again, someone, and herself, may ask. Well, it had been just three years after the war against the Alvarez Empire ended and she became Fairy Tail's Tenth Guild Master when yet another group of dark mages, a whole entire alliance to be specific, decided that it was high time they tried to take over the world and of course, being the chaos magnet she was, her guild was forced to lead the other guilds that joined in to fight against said dark mages. Again, being the chaos magnet she was, she was the only one left standing, just like the time in the fight against Tartaros and was forced to summon the Celestial King yet again. That led to the situation she was in.

Silently, her eyes watched the thin, crimson stream drip into her cupped palms, flooding before seeping between her fingers, dripping onto the moist earth beneath her. As the sun was shining brightly, and there were no obstacles that could block the sunlight, she could see the tiny pieces of the key scattered glinting red under the tinted sunrays. Sitting in the middle of the scattered shards was a pitch black bow, gold shimmer acted as stars against the dark background. There were no arrows, not that she needed them when she could just create them in mere seconds just by tugging the thread.

Just a few steps away was a cat in mid-run as time itself had been frozen. She blinked in surprise as the last time she had summoned the Celestial King, time had not stopped. That just meant that he had released his hold on her magic and was currently using his own and that did not sound good for the tactician side of her.

"Old friend…" A familiar deep voice boomed out. She gulped, already having a vague guess as to what he was about to say. "Old friend, I did not want it to come to this, but this war has gone far too deep for anyone, even you, to salvage." Narrowing her eyes, she was just about to deny his words, even if a part of her knew they were true. But before she could, his voice interrupted her.

"Despite all that, there is one way but this is a last-ditch attempt. The consequences are too high but it's the only way left," Being a student of both Mavis and Zeref, it didn't take her long for to know what he was talking about.

"If it is for the lives of everyone with me, I'm more than willing to do so," Was her answer, her voice strong, hiding no fear or hesitation.

"I wish you luck, old friend," A grim smile tugged at her lips as he disappeared in a flash of light.

Not wasting a beat, she released a portion of her magic, a large pair of white-feathered wings appearing on her back, fluttering a couple times as to release the tension on her shoulders. Crouching slightly, her eyes grew sharper, glowing a bright gold, and with a kick from her right foot to the ground, she sent herself airborne, her wings immediately beating at the right speed to prevent her from falling and actually flying.

All the training she did to improve her speed could be seen clearly by how fast she was able to reach her destination, reaching just as time started to flowing properly. As she hovered more than a thousand metres above ground for the last time, memories hit her at full force, her eyes trailed at the war ground below her. At a radius of a few kilometres, all that could be seen was multiple fallen trees and destroyed buildings; if she squinted her eyes, she could barely make out glints that belonged to large pools of blood; wet and dry. Closing her eyes, she took a deep breath, taking in the sweet scent lingering in the cold air and basked in the warm golden rays of light the sun provided the world with.

Once she felt ready, she slowly raised her hands to her chest, palms facing each other. Her eyebrows were tugged lightly into a frown as she attempted to reach her magic container inside her; it was supposed to be difficult, but years of practice made it as easy as breathing with enough concentration. Flicking off the lock keeping the container shut, she felt all her magic surround her and as quickly as she could, she directed her magic to her hands where a small ball of light was steadily growing, both in size and brightness. Once the ball of light reached the desired amount of light, she curled her fingers inwards slightly as she slowly moved her hands together, the ball of light decreasing in size as it gets compressed.

"Three…" She whispered under her breath, a single teardrop trailed across her cheeks.

"Two…" She continued, fighting the want to cry, both from the pain from her wounds and what was to happen.

Just when her hands were just about a centimetre apart, she snapped her eyes open, showing her eyes had turned into a golden-orange with a tint of red.

"...One…" As she whispered the last number, her wings folded neatly against her back before disappearing, allowing her body to fall, slowly gaining speed.

It was as if time had slowed down as she slammed her hands together, creating a loud slapping sound as she yelled out one word; "LAW!".

With that, the blinding light seeped from her fingers and body, covering every inch of the battleground, pained screams of the enemy rang in the air. Once the screams of pain ended, the light faded away and the blonde came back into view. Her already pale skin was even paler, almost snow-white, her eyes had reverted back to the original chocolate brown.

As the Celestial King had said it, this was a last resort kind of tactic and it was for a good reason, despite it having 99.99% succession rate. The spell 'Law', contrary to popular belief, was actually dark magic, a spell to inflict heavy damage or, in her words, kill anybody her heart saw as an enemy. Usually, if the mage were to cast the spell without ten full years of practice, they would have suffered the contradictory curse, but since she had used up all her magic, the curse had nothing to grab on and thus take something else. Of course, she could have just used 'Fairy Law', a safer version and a spell based on 'Law', but making it safer also meant taking away more than half of its power; in this situation, she needed the more than half.

Silence rang in the air as her pink lips curled into a soft smile, her eyes stared into blank space. As her hands fell limp to her sides, her wings swiftly folded neatly before disappearing a burst of gold light. Now, without anything to keep her airborne, she allowed her body to fall back to the ground quickly gaining speed at a frightening rate but the soft smile remained on her lips. She kept her calm even as the familiar voice of her adopted daughter tore through the air and a pair of strong arms curled around her body before placing her on what seemed to be warm ground; her body having lost too much heat.

"Kaa-chan!" Long dark blue hair, tied into pigtails, came into view before a pair of worried brown eyes came into her view; eyes belonging to her 18-year-old adopted daughter, Wendy Marvell. But she wasn't alone as not even a metre away, the rest of the dragon slayers stared at her, even if some would deny later, worry shone in their eyes as well. The dragon slayers had somehow figured what she had done. Having had made quite a strong bond through the war, they were quick to chase her falling figure.

"I'll save you, I won't let you go!" Wendy mumbled over her tears as she kneeled beside her, her hands already glowing a bright blue.

"Luce! Don't close your eyes!" She turned her head slightly to see familiar pink hair belonging her best friend and partner. His normally bright olive eyes, never fading even at the darkest time, glimmered with tears.

"Dammit, Lucy!" A rough voice yelled she didn't have to see to know who had yelled, "Why? Haven't you sacrificed enough? Why must the cost of ending this god damned war be your life?!"

At that, a dry chuckle escaped her lips, startling the dragon slayers.

"You know why, Gaj-kun. For fate, one sacrifice is not enough, it never will be." The sound of annoyance followed her words.

Then, she raised a hand, curling her fingers around Wendy's outstretched palms with as much strength she could muster. A gasp came from the young teen.

"You all knew this was going to happen, even if I never told you guys; I still don't know know how you do that." Another dry chuckle escaped her lips at the thought, "So, don't waste your magic on me, Wendy. The-" A cough erupted from her throat, her other hand covered her mouth only to feel blood trickle; her body was just a few seconds short of a minute from giving up.

Tightening her grip on Wendy's hands, though it was still weak, she stopped the bluenette from trying to heal her, shaking her head.

"It's no use, Wendy, even if you were able to heal my body, you won't be able to replenish my life force. I'll die either way…" Releasing her hold, her hand trembled at her attempt to move her hand, her fingers barely caressed the wet cheek of her adopted daughter. "Please don't cry, even if I'm not here physically, I'll still be watching you, I'll still protect you…"

As her chest tightened painfully, she was forced to pause her words as she tried to fight the inevitable as long as possible. Her eyes trailed each dragon slayers, tears filling the eyes of even those that always acted indifferently to her, though she knew they cared just as much as the rest.

"I love you…" Was her last word as screams for her filled the air, her hand falling limp as her eyes closed.

The cost of the spell; Her life. Or to be more precise her life force.

But when she saw the familiar face of a certain mischievous blonde as she closed her eyes, she knew it wasn't over. It seemed as fate wasn't over on playing with her life as if it was game. She silently cursed said fate as she stared into curious eyes, the owner emitting a thick aura of death, contradicting their young age of, what she estimated, 15 years-old.

"Cazzo, aveva ragione (Fuck, she was right)," The person muttered in a language which she recognised as italian, looking rather displeased and ready to kill someone. Actually, they probably had killed as she could smell the faint scent of iron on them when they neared her.

It seemed that fate thought that having a murderous person hovering over her when she awoke wasn't enough. No, it wasn't. They just had to also to give her a younger body and by a younger body, she didn't mean somewhere nearing turning into a teen or even child, she meant full blown young. To explain better, she was now an infant.

She, Fairy Tactician and Tenth Guild Master of Fairy Tail, had been turned into a fucking infant.

That was why she had yet to flee; despite hating the idea of running away, she knew she wasn't strong enough. Yes, she had been able to defeat many and is a Wizard Saint. But that had been luck and what little knowledge she had from watching her guildmates brawls as unlike them, she had not earned any skills, she always had to rely on her intuition when fighting. Well, at least in hand-to-hand combat. She never had the time to learn how to, chaos seems to love chasing after her, never giving her a break. Despite that, she still managed to improve her dodging skills and magic levels; she was now able to use Star Dresses which just meant using her spirit's powers.

Of course, she could always just use her magic to protect herself, or just teleport away. But, for some reason, she could not feel any sort of magic container in her, not even a stray particle of magic. Thus, she was defenceless, not that she was willing to use her magic against someone she wasn't sure was an enemy.

That led her to next reason stopping her. It was for the fact that the 'intuition' of hers were saying that the person was safe and would not harm her. As if that wasn't confusing, there were alarm bells ringing in her head as she sensed something, just something, ablaze in the person, as if they had magic but not exactly magic. Not many people had known she had this intuition, or that she had the uncanny ability to sense any magic. Actually, only the past Guild Masters knew of it, the former given by Mavis while the latter by a Heartfilia thing. Now that she thought of it, the tactician must have known what was going to happen, thus deciding to train herself using a lie of 'wanting to train the Tenth Guild Master'. It was the only reason why she was able to win those battles she had as it told her of what to do. It also surprised her, she had thought that she would have lost it, guess it was permanent.

Suddenly, the person froze before frowning, now staring directly at her eyes, making her heart race. Still, her intuition kept saying the person wasn't a danger and the bells rung as loudly as they could, now giving her a slight headache.

Fuck her god damned intuition.

Prologue Extra : Tenth Guild Master, Or Was It Sixteenth?

In her eyes all guild masters of Fairy Tail were amazing in their own ways; no matter what others said, Macao was not a failure, he just lacked the necessary experience.

The first guild master and co-founder, Mavis Vermilion. She had wavy platinum blonde hair, reaching the floor; wide emerald eyes that sparkled with child-like mirth; feathery, wing-like hair accessories attached to both sides of her head; had a love for going barefoot; and oh, did she mention having the body of a 13-year-old? Despite having been physically 13-year-old, she was currently older than a hundred years old and dating to world's strongest dark mage, Zeref Dragneel. Her speciality was strategizing during her battles, and of course, illusions.

The second guild master and also a co-founder, Precht Gaebolg, most commonly known as Hades. This guild master, she didn't know much other than what she experienced when her team, along with Wendy, went to fight against him. From the fight, she could tell he was strong, seeing how difficult it was to defeat him, even though her team was very strong. The only reason they were able to defeat him and stay alive was because of Laxus's intervention and the exceeds destroying the lacrima giving Hades his power.

Then comes the third guild master, and sixth, also her adopted grandfather, Makarov Dreyar. He had been the guild master when she joined and also one of the few to greet her. No words could show how much awe she had for him. From being forgiving, protective; serious but still childish at times; and everything a leader should be. Like the other guild, he too, was strong magic-wise, holding a wide variety of magic and also the spell 'Fairy Law', a law passed down to all guild masters.

Not even a year after she joined the guild, a tragedy occurred during the S-Class exams on Tenroujima island; she was there as Cana's partner in an attempt to stop her from quitting the guild. It was due to this, that Macao Conbolt was 'forced' to take Makarov's mantle, not that he didn't want to, only because he had yet to see the amount of paperwork waiting for him. Now, despite what others said, he was definitely not a terrible Master. After all, in her opinion, it takes a lot of effort and skill to be able to finish that mountain paperwork and not make a mistake. She had reviewed the bank books and was pleasantly surprised to see it neat and done properly. If only someone had taught him the art of managing the money properly without having to borrow from other guild or at least teach him to spot frauds. Nevertheless, he was a great guild master, not the best, but still great.

Then, after seven years had passed, she and the rest of the Tenrou team had returned, only to see the guild in shambles, having moved to the second guild hall as they were unable to pay the very expensive bills from the main guild hall. That was not all, the guild had even fallen into from another guild that had an interest that made it impossible to pay up and thus, said guild had resorted to trashing the guild hall, not that it wasn't in a terrible shape in the first place. This is where the fifth and sixth guild master came into play. Macao had attempted to pass back the title to Makarov, but he declined, deciding to choose the next fifth guild master. After a few thoughts, he had chosen Gildarts only for the triple S-Class mage to make his escape and in the end, Makarov was reinstated as the sixth guild master of Fairy Tail.

She would think that after all the chaos they've made and went through - a war against dragons and watching her future-self get murdered by one future deranged shadow dragon slayer - that they wouldn't be surprised with what happened next. But no, they were. In her defence, it wasn't every day the strongest and silent dark guild - filled with half-demons - waged a war against them. Many lives were lost - lives of the councilmen and the dragon slayers adoptive parents - and many hearts were broken. Even she wasn't safe, being forced to break Aquarius's key to summon the Celestial King to save her guildmates. After everything subsided, the unimaginable happened, Makarov was disbanding the guild.

Despite being disbanded, she never gave up on the hope that the guild would be back once more. Determined to keep the guild together, she had kept an eye on every single guild member, all two hundred members. Even if there was nothing connecting them, it didn't mean she no longer cared for them, secretly helping them when they were in need. That wasn't all she did, she had dropped her whip in favour for a bow and arrow; her skills were high enough that she could knock and shoot more than one arrow at a time without sacrificing her perfect aim. She had also started studying the art of strategizing and gained the ability to use star dresses, the ability to use her spirits abilities. All this was not done without rewards as she now held the title of wizard saint.

True to her words, the guild had regrouped and Erza had been instated as seventh guild master of Fairy Tail. Even after Makarov had returned, Erza still held the position as the former had threatened to pull another escape if she were to pass the title back to him. Everyone was laughing, having fun as they rebuilt the guild hall.

She had thought everything would be much smoother but no, fate had walked up to her, screamed 'Fuck you!' and gave her a good 'ole punch to the face. Oh, how innocent she was to think everything was going to be alright.

If she had thought what she had gone through earlier in her earlier was terrifying and life threatening, this was like being tossed into hell and having had to fend off sadistic demons who seemed hell-bent on wanting to steal her sanity, whatever was left, without any magic. Now,doesn't that sound familiar?

She didn't know when, but, somehow and at some point, Erza had tossed the position of leader, or boss like how Gray and Sting seemed to love to call her, onto her. Apparently, she was much more 'suitable' for this as she was 'smarter' and more 'influential'. But still, she had no problems doing so, Mavis did help her, offering her tips and for some reason, everyone did listen to her orders, even the most stubborn dragon slayers.

So that was how, 20-year-old Lucy Heartfilia, led an army of mages to fight against the Alvarez Empire. It had stretched over two years but it had not ended because they had killed the enemies. No, it was because she had found a way to free Zeref, the emperor of the Alvarez Empire, of his curse and thus, allowing him to be with the now no-longer-a-ghost Mavis.

With the war ended, Erza had ended up wanting to pass the title guild master to somebody else, being a guild master is just not her thing. But that ended up in chaos as well and again, she received the damned brunt of it all. It just started when the redhead announced the next eight guild master.

"-And so, the Eighth, or should I say Second, Guild Master will be Laxus Dreyar," She announced.

"What the fuck?! No, I'm not!" The lightning dragon slayer snapped, having slammed his lightning coated fists into the table he had been residing at. But he was ignored as a familiar 13-year-old blonde skipped towards Erza with a playful smile.

"Call him Second, we are restarting, might as well redo the numbers as well," Mavis cheered, "Laxus-kun will be such a good Master!"

Suddenly, a smirk graced Laxus's lips as a thought entered.

"Well, two can play this game. Third Guild Master is Makarov Dreyar. Bye~" Was all he said as he pulled an escape just like a certain crash mage had done, except with lightning, leaving a very pissed off third master.

"Me?! Third Guild Master again?To hell am I going to accept that! I'm too old for this," Was what the old man said before pointing to a random direction, "Gildarts, you're the Fourth," And with that, he, like his grandson, escaped.

This went on until Erza was reinstated as Ninth Guild Master and it didn't surprise the others that she was about to the exact same thing as the others. What happened next was what surprised them.

"The Tenth Guild Master is-" It was at that moment, that the guild doors swung open, revealing the golden-blonde woman who was Lucy Heartfilia, Fairy Light.

To say she was surprised was an understatement. It was terrified her when all eyes zoomed on her. Her mind whirred as she wondered if something had happened yet again while she was gone. Glancing around, she noticed that Erza was standing on the stage. Was she in the middle of giving a speech? Better question, why the fuck didn't she know about this?

"…Lucy," Erza was the first to break the silence. Before the blonde could comprehend what was going, the redhead perked up as she grinned, "Lucy is the next Guild Master!"

The blonde's soft 'what' was drowned as the other guild members cheered. Suddenly, Mira was in front of her, a grin gracing her lips and a strawberry milkshake in hand.

"Congrats, Master! Here, it's on the house, extra strawberries~" Mira cheered, ignorant of the blonde's confusion.

Next, it was Mavis, Zeref trailing behind her looking amused at her confusion.

"Welcome to the club, Lucy! Don't worry, I'll train you to be the best Master ever!" The determined glint in her emerald eyes just shone brighter. Was it just her or was Zeref snickering at her?

"What happened to the Eight and Ninth?" Nobody dared to re-tell the story under a certain knight's glare.

It was at that day did she truly question her middle name, 'Lucky'. How lucky was she if she kept picking the wrong moments? It was also at that day did she question Makarov's sanity after seeing the amount of paperwork he had to deal with daily.

Author's Note

Hey! So, this idea has been bugging me as I tried to continue writing the chapters for the rest of my stories and decided to write this instead since I was failing at doing the latter.

This is my first time writing a cross-over and I'm not following what happens in Canon 100%, maybe some events, but not all as this is mostly Lucy-centric.

Ships have not been set but I have ideas of which pairing I would like and will show ship moments then do a poll on which pairing I should choose.

Summary :

1) Lucy is two years older, so in canon starting, she is 19, not 17. Currently, she is 25-years-old that has been turned into an infant.

2) Lucy is Tenth(Sixteenth) Guild Master of Fairy Tail and a Wizard Saint.

3) Lucy died in order to cast the spell 'Law' which was taught by Mavis and Zeref.

4) The 'intuition' and 'magic detector' Lucy has was fully unlocked by Mavis and is not Hyper Intuition, but similar.

~ Warnings To New Readers : I don't have a set schedule when updating but I try to achieve at least once a month.

~ Unless I have stated on my bio or have written an A.N., this story will not be dropped. ~

~ Please leave a review before leaving, it'll help keep my motivation up, thank you ^-^ ~

Completed (20/09/2016)

Edit 1 (22/09/16)

Edit 2 (-)

Word Count : 4353