(Disclaimer. This chapter contains a massive spoiler for Kingdom Hearts 3 so if you haven't played the game, finish it before coming here, because you will be spoiled when reading this. I do not own Kingdom Hearts or the RWBY series, and they belong to their original creators. With that being said. I hope you enjoy)

"Master Yen Sid… Is it really this wise to hand something this important to me?" A white-haired figure asked looking up at the tall old man in blue robes.

"Ozpin. You already have the burden of handling the four treasures of your world, but this task can shape everything in the universe." Yen Sid said placing something into Ozpin's hand, who grips it. "Master Xehanort has tried to make the X-Blade once already, and we have lost valuable Keyblade Masters. I would have this be in possession of someone I can trust. That is why I am giving this to you."

"I understand… I am honored to feel that I have your trust Master Yen Sid." Ozpin said putting it, in a secret compartment in his cane.

"Of course you have my trust, Master Ozpin… May your heart be your guiding key." Yen Sid said before disappearing in a cloud of smoke.

Ozpin looks up at the sky before turning around towards Beacon Academy and takes a look at his cane but doesn't open a compartment. His hands were shaking from the responsibility of which he holds, but Ozpin takes a deep breath before walking back to the academy.

(12 years later)

"Twelve keys we have now…" Xehanort said with multiples copies of No Name were surrounding him as he takes summons another version. "Just leaving one more." The man shoots an energy beam up at the sky unraveling dark clouds before a giant heart-shaped moon appears. "Now, Sora. Darkness and light's final clash."

Sora was on a lower platform taking heavy breaths with Riku and King Mickey, exhausted after just finishing a fight. Out of nowhere, Kairi floats next to Xehanort unconscious.

"Kairi!" Sora calls out towards the girl.

"You require motivation," Xehanort said preparing his blade, with Sora jumps and run along the platform towards the two. However, he was too late, and Xehanort swings his Keyblade encasing the girl in ice before shattering.

"Kairi!" Sora was in a state of shock as he made his way up the platform, angry and sad at the same time. He swings his blade at Xehanort with all of his might only for it to be blocked so easily. "Why her?!" Xehanort doesn't say anything and overpowers Sora and launches him back towards Riku and Mickey. Sora makes a fist on the ground with tears coming out of his eyes. "Why?!"

"I have done it," Xehanort said with a smile as the thirteenth keyblade was made.

"Xehanort!" Riku yelled out in anger this time and strikes, only for it to be blocked by one of the floating Keyblades and launched back. Mickey came up behind him and casts a powerful spell.

"You'll pay! Ultima!" Mickey casts pointing his Keyblade towards Xehanort who raises his hand.

"Stopza!" The two magical spells clash with each other creating a shockwave that stops time for Mickey and Riku, but Sora and Xehanort weren't affected.

"Riku! Your Majesty!" Sora starts to run towards Xehanort, before turning around and getting hit with a floating Keyblade.

"Now… the Keyblade War will finally reach its conclusion!" Xehanort says as he floats in the air with his thirteen Keyblades surrounding him. He points one of them at the heart-shaped moon, and all of the Keys turned into one massive blade. "The X-blade… is complete… What?"

The X-Blade looks different from before as it was just an empty husk for some reason. Xehanort examines the Keyblade, confused about what was exactly wrong before looking at Sora. Then he noticed, what precisely the problem was.

"It's gone?! The X-Blade doesn't have its full power without it!" Xehanort looks far into the distance as he sees Yen Sid facing off a bunch of heartless and put some thought into it before realizing. "You sly fox…"

Sora struggles to get up and hears footsteps behind him as he turns to see all of his friends. Xion, Roxas, Lea, Ventus, Terra… , and Kairi. "Kairi!"

At this moment, Riku and Mickey escaped their cage of time and lands on the ground before turning to Kairi. "Kairi?!"

"We thought that you…" Riku said before looking around. "Where's Aqua?"

"Aqua? We thought that she was with you." Roxas said before looking at Kairi and then at Ventus with an interested look, as Ventus does the same.

"Hold up a minute. What did you guys think happened to Kairi?" Lea asked as the three looked down. "No way…"

"She died… and became part of the X-Blade. The thirteenth part of it." Mickey said causing everyone to react with a shock.

"That means… Aqua's gone. After all those years." Terra falls to his hands and knees and punches the ground with anger.

"Why would Xehanort want Sora to see Kairi instead of Aqua?" Lea asks in confusion.

"Possibly to get through Sora. To mess with his mind to make his mind so focused up in revenge, giving Xehanort the easiest possible way of winning." Riku speculated with a sigh.

"Hold up. That's not the X-Blade." Ventus said as everyone looks at Ventus. "It's different then what Vanitas used at the battle 12 years ago. That's like a hollowed version of it."

"That means that Aqua should be… fine." A Keyblade falls to the ground beside Sora, and he picks it up. It was Master Eraqus's Master Keeper Keyblade. "That Keyblade…"

"That's Aqua's Keyblade!" Mickey yells out as Sora picks it up before everyone notices what was in Sora's other hand.

"Hey, Sora… You should look at your Keyblade." Roxas said in a silent voice towards his somebody. Sora was confused before realizing what was wrong, his Kingdom Key had lost the top part of it, including the teeth of the blade.

"Sorry to see that man." Lea grunts before looking at Master Keeper. "How about you keep a hold of that one? Long enough to give it back to Aqua."

"Yeah. You need a way to fight as well Sora." Kairi said with a small smile.

"It looks like you realized my little trick," Xehanort said coming down to the platform as everyone gets in a battle stance. "It seems as though I have made a mistake. The X-Blade is far from complete. After all, the most important part is missing. But I know where to look."

"Wait! Xehanort!" Terra yells out running towards Xehanort with his Keyblade only to hit nothing but the air. Xehanort had disappeared without a trace.

(Mysterious Tower)

"It seems as though we have failed at stopping Master Xehanort from completing the X-Blade at the lost of Master Aqua…" Yen Sid lets out with a sad look on his face, the same as everyone. "However, all hope is not lost, for we know exactly where the last piece is."

"You do? How exactly?" Roxas exclaims with a confused expression.

"Aqua, before hiding Ventus, gave me a unique item. A Keychain. The thing that changes a Keyblade and empowers it."

"So you're saying that you have the X-Blade's keychain? If I may ask, why not just use it on any Keyblade? Why did Xehanort need to create it the way that he did?" Mickey asked with everyone deep in thought.

"That is because such a great power must have the proper vessel to control it to its full extent. The Keyblade that was made with the thirteen clashes is the only one strong enough to wield such power. But until Xehanort gets the Keychain, we have the advantage."

"I would say that we having the advantage in numbers and the controlling the final piece is well and all; I would have to say that we still need training. All of us. And Terra should rest with Lea." Riku said looking at the ones that he mentioned. Lea looked a bit winded and exhausted while Terra looked exhausted.

"I'm… fine." Terra said with a bit of heavy breathing before falling onto his knees.

"Terra! Take it easy. You just came back." Ventus said kneeling down to help his friend.

"N-No. I… I don't need… to rest."

"Terra," Sora calls out making the Keyblade Wielder look. "You don't need to push yourself so hard. Aqua wouldn't have wanted you to overwork yourself. We all need to train while you rest and regain your strength."

"Sora… Alright. I'll do that." Terra said with a smile.

"So Master. Where are we going to train? Are we going to be training with Merlin again?" Kairi asks receiving a no.

"You will be training with a friend of mine at a world of fighters, called Remnant." Yen Sid said as he waves his hand, an orb appears with a light shining out of it revealing a castle. "This place is known as Beacon Academy, a place where young Hunters and Huntresses learn how to harness their skills against the forces of darkness."

"I see. Since this place is a proper school for people to fight, it's perfect for something like us." Xion says with a sigh. "I always wanted to go to a proper school."

"Well, now you can, Xion." Roxas smiles brightly at Xion before looking at Lea.

"Now. We also have one more thing. This school requires their students to be in groups of four."

"That's right. I won't be able to join you guys, neither Goofy or Donald have the strength to help as it is, leaving you seven by yourselves."

"Wait a second… Seven? Then we're missing one more." Sora said counting everyone with his fingers.

"You wouldn't happen to have another person inside your heart now would you?" Ventus asked Sora making everyone chuckle.

"Sora is kinda like the home for lost souls. I wouldn't be surprised if it were true." Riku added on to it.

"You guys serious?! I was a kid when it happened." Sora said getting a bit salty about the fact.

"Well does Kairi count? Her heart was inside your body when you first got the Keyblade." Lea comments.

"Lea!" Sora's outburst made everyone laugh. Yen Sid clears his throat getting everyone's attention.

"Yes while it may seem like something like that may happen. Unfortunately, it will not help us at this present time. I have had Ansem the Wise help us with getting our eighth member. He will be arriving soon."

"Huh? Who is it?"

"Someone that came to make amends." Everyone turns around to see a familiar figure.

Ruby leaves her bed while hearing the sound of birds coming from outside her cottage home and looks out the window. Patch was in the middle of springtime and school was going to start soon, and Ruby couldn't help but feel both excited and nervous at the same time. She got out of her bed and opened the door to see the one thing that took her anxiety away.

"Zwei! Just the one I wanted to see!" Ruby yelled out picking up her dog from the ground and hugging him with all of her might without squishing him. "I'm going to miss you so much. I'll make when I write to dad, I'll always ask how you're doing."

"Arf!" Zwei barked while licking Ruby's face.

"By the way, it's looking; you're going to be missing Zwei the most." A voice came from the stairs revealing Taiyang with a smile. "Hurry and get dressed. You're going to be meeting your sister in the city today, so you got to be ready… Ruby is already going to Beacon. They grow up so fast!"

"Dad…" Ruby said making her father jump before letting out a chuckle. "Anyway, I'll get ready. Should only take me 5 minutes."

Ruby zooms into her room and comes downstairs in the exact time that she said.

"Now… I know that you must have heard this speech so many times."

"SO many times."

"And you probably heard it when I told Yang this."

"Definitely then as well."

"But I'm going to repeat it. I love you Ruby, but as your father, I got to make sure that you're safe at all times while you're away. You can't trust every single person that you meet there. Some might try to use you and such." Taiyang said as he goes off towards his speech about safety and boys and all that while the young Huntress in training just sat and listened, petting her dog at the same time. "Anyway, your ride should be here soon enough as it is. Hurry on now."

"Alright, dad. Love you!" Ruby hugs her dad before taking her suitcase full of her belongings and rushed through the door as fast as she could. Taiyang leaves the house and waves slowly at his daughter. Zwei follows him and sits down before barking at Ruby while angling his head.

Ruby runs towards a location where a car was waiting for her to be taken to the city. Inside she looked outside the windows looking back at Patch and Signal Academy. Ruby thought about all of her friends that she was living by and gave it a good thought before looking forward towards where the car was headed. 'Man I'm going to miss them… I'll send them letters so it'll be fine! I'll just make new friends while I'm at Beacon. Just… don't be awkward!'

Ruby looks outside the window again before her eyes start to get heavy. She had a hard time falling asleep the day before and the next thing that Ruby knew, she was asleep.

"Ruby! Let's go have some fun!" A voice echoed in the void. There was a faint picture of a boy no older than she was with a bright grin on his face. They were together in a city before the picture turned into a place at the beach. The two were sitting on a tree staring at the sunset, they both felt at peace. "The sunset is always beautiful… Though."

There was static in the dream before the boy could finish his sentence and the next thing Ruby knew, she woke up looking around, trying to remember the dream.

Ruby got out of the car once it had fully stopped and walks out through the crowded area filled with people who were accepted into Beacon Academy, though Ruby didn't see her sister, Yang anywhere. Ruby took her luggage to the check-in station and the next thing she heard was a bell and a massive crowd came by taking her by surprise and heading to one of the gates. "Aah! YANG! SAVE ME!"

"Hey, Ruby!" Yang said coming from out of nowhere once the two finally stood perfectly fine without anyone to push them around. "Oh, I can't believe my baby sister is going to Beacon with me! This is the best day ever!"

Yang gives her younger sister a bear hug in excitement, while Ruby had a tired expression. "Please stop."

"But I'm so proud of you!" Yang said barely containing her excitement.

"Really Sis, it was nothing." Ruby tries her best to calm her sister down but was obviously failing.

"What do you mean? It was incredible! Everyone at Beacon is going to think you're the bee's knees!"

"I don't want to be the 'bee's knees.' Okay? I don't want to be any kind of knees!" Ruby said trying to relieve some of the tension off her chest. "I just want to be a normal girl with normal knees."

"What's with you? Aren't you excited?" Yang asked, a bit confused about her sister.

"Of course I'm excited... I just... I got moved ahead two years. I don't want people to think I'm special or anything."

Yang puts her arm around Ruby before saying. "But you are special."

"The robbery was led by nefarious criminal Roman Torchwick. Who continues to evade authorities. If you have any information on his whereabouts, please contact the Vale Police Department." It was a news projection about a figure that looked familiar to Ruby. "Back to you Lisa."

"Thank you, Cyril. In other news, this Saturday's Faunus Civil Rights protest turned dark when members of the White Fang disrupted the ceremony. The once peaceful organization has now disrupted..." The news coverage cuts off and a figure appears from the same projection.

"Hello, and welcome to Beacon!" The figure said.

"Who's that?" Yang asked before Sora came next to the two.

"I have no idea," Sora said making the two jump. "Sorry about that. I just wanted to get a bit closer."

"It's fine..." Ruby said looking at Sora. "Have we met before?"

"Hmm? I don't think so." Sora shook his head.

"My name is Glynda Goodwitch."

"OH..." Sora and Yang said at the same time.

"You are among a privileged few who have received the honor of being selected to attend this prestigious academy! Our world is experiencing an incredible time of peace. And as future Huntsmen and Huntresses, it is your duty to uphold it." Glynda explained, giving a motivational pep talk to the students. "You have demonstrated the courage needed for such a task, and now it is our turn to provide you with the knowledge and the training to protect our world."

The projection for Glynda disappears leaving everyone to reflect on what she said.

"Wow! Look at the view!" Sora said running up to the glass window and pressed his face on it while looking outside. "We are so high up here!"

"Look! You can see Signal Academy up here!" Ruby said before pondering. "Guess home isn't too far after all."

"Beacon's our home, now," Yang said before turning to Sora. "So cutey. What's your name?"

"C-Cutie?" Sora gets a little flustered as it came out of nowhere.

"Yang... You can just say that to someone you just met!" Ruby said before turning to Sora. "I'm sorry about that. My sister can be a little forward."

"It's... fine. I'm Sora. Nice to meet you." Sora lets out a goofy grin.

"Well, I'm Yang." Yang introduces herself. "And this is my younger sister, Ruby!"

"Nice to meet you Sora."

"The feeling is mutual," Sora said before looking over their shoulder to see a blond boy. "Is he going to be alright?"

"Well... I guess the view isn't for everyone." Yang comments

"It was a nice moment while it lasted." Ruby agreed. "I wonder who we're going to meet here?"

"Probably a bunch of nice people. I mean, they did get into this place." Sora said with his arms behind his back.

"Yeah, I just hope they're better than Vomit Boy," Yang said, with Ruby looking down before noticing something starts to freak out.

"Oh, Yang, gross! You have puke on your shoe!" This set a red alarm for Sora and Ruby as the two starts running away from Yang.

"Aah!"

"Get away from me!"

"What on earth is Sora doing?" Riku questions while pinching the bridge of his nose.

"It looks like Sora made a new friend. Pay up, Isa. You owe us ice cream." Lea chuckled as he slaps his childhood friend's back.

"Sweet. Thank Isa. You should really know how Sora acts." Roxas said chuckling while looking at his somebody.

"Well, I don't hang around in his heart all of the time, Roxas, so I have no idea." Isa states with a blank look in his face.

"But honestly, you should really know how Sora thinks," Xion adds. "Sea salt for all of us!"

"Yeah!" Xion, Lea, and Roxas cheered in excitement, getting a smile from Ventus, Kairi, Riku.

REMNANT

Xehanort walks towards a room and uses his No Name Keyblade to open the door as it slowly opens revealing a woman dressed completely in black and skin completely white.

"Xehanort... I was not expecting this type of visit. What brings you here?" The woman asked, curious about the sudden visit.

"It was something of grave importance that I could not wait, Salem. I have completed the X-Blade but it's incomplete. I am still missing one more essential piece. Your old husband has it... That is my theory." Xehanort said looking at No Name. "More than half of my Organization have also turned their backs on me, though I was able to get a few members back."

"So you think that you could come and just ask for my service?" Salem asks, receiving a nod. "You are absolutely right though. If I had your help, it would be killing two birds with one stone. You get what you want, and I get back one of the maidens and see Beacon fall."

"Then we are at an agreement. I'll help you spread your darkness around this world and I'll give you Ozpin, in return, I will gain my keychain that will complete the X-Blade." Xehanort lets out a small chuckle as the doors closed with an echo.

Hey guys, I'm NexusMC, here with a crossover that I wanted to do for ages but never really had the chance until Kingdom Hearts 3 because Keyblade transformations are a cool concept that I wanted Sora and the others to have because the RWBY universe has weapons that can transform all the time. There are also things that could happen in the game which might contradict with what I may write, and I wanted the stuff to happen in this fanfiction, be as close to the actual thing as possible, and I already messed that up by having Aqua being the one to die for the X-blade instead of Kairi.

To be honest, Kairi dying messed me up quite a bit and I had no idea that something was going to be something like that was going to happen. I had written all of the planning beforehand and this was really the final result of it, but then Isa came up as well because he was defeated so I couldn't bring him back. It'll be said later on in the fanfic, in how he comes back to be with everyone which will be the same way that Aqua will come back, as they both became part of the X-blade. But this method will allow Xehanort to regain his Organization members back while still having the X-blade but like what Larxene said, she didn't want to be his heart tank so some of them left Xehanort.

I also made the choice of breaking Kingdom Key because honestly, I thought that Sora was going to use it as I had a theory of Master Keeper being an evolved version of the Kingdom Key so Sora will use that and Aqua will regain her Keyblade that was lost in Radiant Garden which will be a long way down the line.

With that being said, this is NexusMC signing out. If you enjoyed this chapter, give this a follow, favorite, and review for more bi bi-weekly content. Stay Classy!

(Edit: Because some people are upset about how the KH3 scene is portrayed with the illusion switch between Aqua and Kairi and the final piece of the X-Blade, I will say this properly to make it clear. This will not be 100% accurate to either series because I came up with this idea before KH3 release and the idea of Kingdom Hearts in the series affected RWBY as a whole.)