Based on Sekiro's final boss, so there will be spoilers in this. I just made this for fun, so it may have a lot of mistakes in this. Remember people, "I do not promise quality".
Raven stood amid a field of white flowers that reflected the light of the moon high in the sky. The field was on a cliff facing a large castle surrounded by purple crystals.
That was her goal, to find and defeat the immortal Salem. She knew of a way to kill the immortal creature, but to do so she needed a specific sword.
In front of her, was a young man covered in armor and holding a large katana similar to hers, except it was pure silver, with the sharp edge of the blade a deep black that devoured all light. The guard of the blade was a silver flower whose petals would catch other blades. His blonde hair waved in the sky, and his deep blue eyes glared out at her.
She remembered him, she fought him once before, and was thoroughly thrashed. But that was before she got the strength she now held. She glanced down to her left arm, and the prosthetic that started just below her elbow. When she first fought Jaune Arc, he bypassed all her defences and severed her arm. It happened faster than she could even see.
Raven clenched her fist. She had to do this, after having her brother fight Salem and die to her, she knew that ending Salem was the greatest feat of strength. She would become the strongest, and she would create a world where the people no longer need strength to survive.
Raven unsheathed her blade, her old weapon was gone, shattered by the man in front of her, but her new sword was just as good. Though it didn't have her old tricks, she had plenty of new ones.
"I'm surprised you're alive. If you have survived that, then…" Jaune said, raising the blade to her. "Then I will put you down properly." He chuckled. "Behold, the Fushigiri." Thunder cracked in the sky.
Raven knew that her sword was not as good as the Fushigiri, the unbreakable sword that can never dull and can kill anything, even those granted immortality by the Gods. That was why Jaune held it; he was corrupted by Salem's magic and holds the blade in her service.
"I'll end you here and now… For my brother's honour." Raven said, holding her steel katana, Kusabimaru in a battle ready stance.
Jaune held the Fushigiri up, black and silver flames covering it, before he swung and sent a wave of energy at her.
Raven leapt over the wave and swung down at Jaune. He deflected her strike to the side and grabbed her hair before pulling her into a knee to her gut, an attack which caused her breathe to be forced out of her lungs.
As she stumbled back to catch her breath, Jaune held up the Fushigiri and aimed the tip at her before thrusting it at her neck. Luckily, Raven was able to bring her own blade up enough to knock it aside, though it drew a drop of blood from her neck.
Raven recovered and deflected Jaune's next blow, before stepping to his side and slashing at his armpit, where there was a gap in his armor. He groaned in pain and swung around to face her, and lifted his leg.
As he kicked towards her, Raven stepped to the side and stomped on his leg, bringing him to his knee, before swinging Kusabimaru, trying to take his head off.
The corrupted warrior blocked with the Fushigiri, but was knocked onto his back. Before Raven could capitalize on his moment of weakness, Jaune had rolled back onto his feet and was already on her, Fushigiri created streaks of black and silver flame like light as it danced across the field.
Neither fighter was able to get past the other's defences. They were both experts with the sword, capable of deflecting and blocking all their attacks, or dodging those they couldn't. That was, until…
Jaune thrust the Fushigiri at Raven who used the same technique as before, the 'Mikiri Counter' to stomp on the blade and knock him off balance. As Jaune stumbled forward, Raven moved to his side and thrust her blade through his right armpit. Jaune couldn't speak as his lungs were torn to shreds.
Raven wrenched the blade out of her opponent, spraying blood like a geyser. Jaune collapsed onto his knees. "I win… I'll be taking that sword of yours now."
"I think not." Jaune said as he stood back up. Raven was shocked to see his wounds close up and heal, and a fierce red blood like flame being the method that it did so. His eyes turned red with the same flame like aura coming out of them.
"Y-You bastard! You drank the Rejuvenating Waters!?" Raven shouted.
Jaune chuckled. "Of course I did. I created it. Now I am eternal, and with the Fushigiri, the Undying Slayer, the Mortal Blade in my hands… none may end my life, and I shall both use it in Salem's name, as well as hover it over her neck." Jaune informed, laughing as more lightning struck the canyon between them and Salem's castle.
"Then I'll just have to wrench it from your grasp and slay you that way!" Raven said, holding her sword up and parallel to her head, tip aimed at Jaune.
Jaune threw his head back in laughter. "I would love to see you try! While we fight, you will get tired and exhausted, while I will never lessen, only get better!" He mocked. "You'll never get a fatal blow like that again!"
In an instant, Jaune was behind her, sweeping the sword across the ground and trying to take her legs off.
Raven jumped into the air, and as she came down placed a foot on his face and jumped off it, knocking him off balance. Raven came down with her sword swinging, cutting his cheek open before it healed again. "Then I'll just have to be better than I was a moment ago!" Raven roared, her sword flashing in the moonlight as she attacked.
"You're getting slower!" Jaune mocked as he blocked and parried every single one of her strikes.
Raven surprised him by leaning down and slamming a foot into his knee, snapping it. With a yelp, he fell forward, and Raven pulled both legs to her chest as she put both hands on the ground. She then pushed the ground away from her and kicked both legs out into Jaune's face, almost snapping his neck and sending him a few meters away from her.
"How's that for slow!?" Raven taunted.
Jaune stood back up, feeling his chin and chuckling. "I take that back. You were just trying to lure me in. Smart. Just like Yang once did." Jaune said as he remembered how Yang beat him so many times in Beacon after he got good at fighting. "I never expected you to use that trick. But I should have seen that coming, the apple doesn't fall far from the tree, after all."
"Shut up!" Raven roared, getting back into her stance.
"Oh~? Did I hit a nerve? I'm sure you'll love to know that before I attained immortality and joined Salem's forces, me and Yang had a… close… relationship. That kid?" Jaune smiled viciously. "That's mine."
Raven grit her teeth and widened her stance. "Shut up. Shut up. SHUT UP!" Raven sped forward and slashed at Jaune with all of her might. She was angered that he abandoned Yang and his child to create the Rejuvenating Waters and to join Salem's forces.
Jaune raised the Fushigiri and blocked her attack, before he span his weapon around, dragging her sword with it before slamming her sword into the floor and kicking Raven in the chin. The force of the kick knocked Raven back and made her let go of her sword.
Jaune reached down, gripped her sword, tore it from the ground and span as he moved, before stabbing Kusabimaru into Raven's chest. "Don't worry… I'll tell Yang that her beloved mother is no more. She'll be overjoyed. Plus, Yang will be drinking the Rejuvenating Waters, and will be immortal alongside me. She'll be stronger than you could ever imagine, I'll make sure of that."
Jaune let go of Kusabimaru, and Raven stumbled back, and fell to her knees. Her eyes drifted closed and she died, but did not fall.
She heard a voice… As she died, a voice called out to her. "Raven, take my power, my blood, and continue your work in the world of the living…"
The only thing Raven could think was 'Summer…'
Raven gasped as air filled her lungs, and a bright silver light burst from her chest, pushing her blade out and bringing her back from the dead and healing her wounds. 'I-Is this one of the powers of the Silver Eyes? But how? I don't have Silver Eyes… Summer… did she give me her powers from beyond the grave?'
Raven looked up to see Jaune staring wide eyed at her. "W-What the hell? So… it seems you have the Divine Silver Eyes Heritage, the Divine Silver Blood runs through your veins." Jaune growled. "Very well, I'll make sure you stay dead this time!"
It began to rain around them as Jaune charged at her.
Raven was ready, she felt better than she had ever before, she felt good as new! Raven sidestepped Jaune's strike and cleaved his right leg off, causing him to fall to the floor as the red flame like Aura appeared on his stump, quickly regenerating his leg.
Though before he could recover, Raven was over him and plunged her sword through his neck and tore it out in an explosion of blood.
She stepped back as Jaune rushed to his feet and swung the Fushigiri at her again, only for her to deflect it and plunge it through his neck before wrenching it out sideways, snapping his neck and sending out another geyser of blood.
Jaune recovered in seconds, and blocked a strike from her before jumping into the air and coming down with a powerful slam. As Raven rushed to the side to avoid his attack, he lifted the blade ever so slightly, before rushing at her with a thrust.
Raven used the Mikiri Counter technique once again, and plunged Kusabimaru into his neck again. Raven kept the blade in his neck, jumped up and placed a foot on his shoulder. Kicking off, Raven twirled her sword around inside his neck, before landing back on the ground and ripping it out of his neck. Raven was facing away from him, and as he fell backwards with his blood spraying out, she flicked the blade to clean all the blood off it and sheathed it.
Jaune stood back up and stumbled away from her. "You're… much stronger now… the Silver Eyes has granted you Divine powers…" He chuckled before growling. "But… I will not surrender just yet!"
Jaune reached up and tore his armor from his body, as the lightning storm above the two grew more and more intense.
Jaune's body was revealed. Without his armor or upper clothes, the burnt and scarred flesh underneath was bared to the world. "The power I have worked so hard to achieve, the strength I have sought… this is the price I pay for it! I will not lose to you! Not yet!"
Raven steadied her heartbeat and breathed deep.
Jaune held the Fushigiri in front of him, and placed both hands on it as the black and silver flames burst into life on the blade. Jaune breathed deeply before tensing. A wave of power came from him and all the flowers swayed in the wind created by Jaune.
Jaune was behind Raven in an instant, but she was ready for him. She span around and blocked his Fushigiri, but was knocked away with a kick.
Raven saw Jaune leap into the air, but he did not come for her. Instead, he raised his hand high and grabbed hold of a bolt of lightning, before throwing it at her.
Raven was struck, and was forced to her knees as the lightning coursed through her.
Jaune landed on the ground, and did not let up. He charged, and brought the Fushigiri to strike her.
Raven lifted her Kusabimaru in the way, and when both swords touched, the lightning coursed from Raven and into Jaune before it exploded, sending the both of them flying away from each other.
"Damn it!" Raven groaned as she slowly stood up.
Opposite to her, Jaune was being healed by the Rejuvenating Waters, the red glow only now receding from his body, leaving only the burns and scars that he attained before he became immortal. "Look now, Raven! And see that you cannot beat me! You may now be immortal like me, but I hold the immortal killing sword!"
Jaune rushed towards her, thrusting his sword at her. Raven was prepared and sidestepped. But Jaune had learned, and instead slammed the sword into the ground to leap into the air, before spinning around and holding the sword high.
Lightning struck his blade and he swung it, sending a blade of lighting towards her. Raven jumped into the air alongside Jaune, and held her sword out.
The lightning struck her sword and stayed in it, and Raven swung her blade at Jaune as he landed.
The lightning coursed through his body and he was paralysed. Raven took advantage of this and rushed forward, piercing her Kusabimaru through his neck again.
Raven reared her leg up and kicked him in the head, knocking him off her sword. Jaune held up his Fushigiri to block her strike, but as she pushed his arms back, she brought the sword under his blade. Making sure to lean into him to make it so he couldn't strike back, because his arms were held to his body by hers, she stabbed Kusabimaru into his stomach, and the walked past him, tearing it out alongside most of his internal organs.
Jaune fell forward with a gasp. He caught himself before he fell too far, and already the Rejuvenating Waters were healing his wounds.
He turned back to her, and saw her ready to continue fighting. "I… am not strong enough…" Jaune admitted.
Raven quirked an eyebrow.
Jaune chuckled. "But… while I am not strong enough… Ozma, was…" Jaune held the blade to his right shoulder with the edge touching his neck. "The Fushigiri's power doesn't only give it the ability to slay the immortal." Jaune informed. "It can also… transfer immortality…"
Jaune brought the blade back down, slicing open the right side of his throat. Raven backpedalled when an arm burst out of Jaune's wound.
The dark skinned arm reached down and gently grasped the Fushigiri in Jaune's hand, as a man pulled himself out of Jaune's body. He wore a light robe that was opened to reveal his chest, and he wore a helmet with a crest that Raven had never seen before.
"Ahh… my child… this is your last wish?" The man said as he stepped onto the ground and Jaune fell back dead.
Ozma stood tall and glared down at Raven. "You have granted me the power to end Salem, in exchange, I kill this girl? Very well…" He held the Fushigiri in both hands. "Come, girl… meet your end here… What a beautiful place to die."
The brown haired man simply started to slowly walk towards Raven.
She could feel the immense power that he radiated, it was more than anything she had ever felt. It was as if he was as strong as Salem herself, maybe even stronger.
Faster than even Jaune, he was in front of her, sword blazing with speed unbefitting a human at all. It was as if he were a God made flesh.
He smacked her sword away with a twitch, before he slammed a barrage of lightning fast kicks into her chest, before leaping and landing a spinning kick into her head, snapping it and sending her flying.
"Is this all you've got, child?" Ozma held his sword high above his head and brought it down with incomprehensible speed, stopping just above the ground and sending a wave of Fushigiri's power to strike and kill Raven.
Luckily, the silver light brought her to life before it landed, and she was able to avoid it. "What the hell is he?"
Raven flicked her left arm and brought forth a small tube, which she held up and sprayed a gust of fire into Ozma's face as he came closer, this blinded him enough to where she was able to get some distance from him. She needed a plan.
"Hesitation is defeat." Ozma said from behind her, causing Raven's eyes to widen.
Oma brought his left hand up and cleaved Raven's right arm off with his bare hand. He then reached out and grasped her sword in his hand before severing her head.
As the silver light enveloped her and restored her to life again, she used her restored right hand to avoid her own word which was thrown at her.
Raven pulled her sword from the ground in time to deflect an attack from Ozma. "That's good." He complimented before kicking her in the chest and knocking her back. "You're a fierce cub, but I'll make a lion out of you yet."
Raven breathed deeply, centering herself, before she charged at him. "Good, good! One must remain on the offensive, don't give your opponent the time to recover!" Ozma said as he blocked and deflected all of her attacks, as she did his.
"Lower your stance!" He said, and Raven did so just in time to block an overhead strike which would have cleaved through her defence had she not done so.
"Be prepared!" He shouted, before sweeping the Fushigiri over the ground, causing Raven to leap into the air and kick Ozma in the head, getting a cut on his chest as she came down.
She struck again, making sure to never give him a moment to breathe, while also giving herself plenty.
Suddenly, when she hit his blade, Ozma was forced onto his knees as his stance was broken under the relentless assault. Raven took advantage of this and shoved her sword into his chest.
Ozma knocked her away with a push, he stood back up and Raven saw Ozma's wounds heal. Jaune had transferred the Rejuvenating Waters to this dead man and brought him to life, and given him immortality.
Compared to Ozma, Jaune was a flailing child. The blonde warrior was more than enough to face any opponent in this age, but Ozma was from a time long before, where the Gods gifted great warriors with far greater powers.
Raven watched Ozma slam a fist into the ground and he pulled out a huge spear. It was over three times as long as he was tall, and the crossguard and blades separately were twice as big as he was. There was no way a normal human could wield such a weapon, let alone with one hand.
Ozma rested the spear on his shoulder and ran at Raven. "You're strong, girl!" He placed the tip of the spear to the ground as he ran. "But not strong enough!" He pulled the blade up quickly and pierced through Raven's chest as she tried to jump over what looked to be a sweep.
As her blood rained down, Ozma swung his arm and slammed Raven into the ground, before standing there and waiting.
Raven was covered in silver light and restored to life once again. She stood up just in time to deflect a blow from his spear, and be unable to block the pommel of the Fushigiri slamming into her face and shattering her nose.
Ozma sighed as he saw that she was not able to continue fighting, and pierced her through the neck with the spear, before standing back and waiting once again.
This routine continued, Raven trying and failing to fight Ozma as he killed her over and over, never once cutting her with the Fushigiri. He instead simply pummelled her to death with the spear or his fists.
But, Raven kept getting better. Every single time she died, she understood further what he would do next, and was able to keep up with his fighting style. Soon, she was able to not die in five seconds against the man who was millennia old.
She was able to get another hit in when she dove under a thrust with his spear and stabbed him through the leg, causing him to fall to his knees. She pulled her blade free and was about to push it through his head when her own head was thrown back with a loud bang, blood pouring out of a small hole between her eyes.
As she fell to the floor, Ozma stood up and revealed that he has a repeater pistol grasped in his left hand, with the spear held under his arm. He placed the pistol back in the holster on his left leg.
"My, my, my… the cub is becoming a lion. I might just have to get serious." He said, looking into the stormy sky as lightning flashed and thunder roared, and the rain battered the two combatants.
Raven stood back up as the silver light faded. She gasped for breathe and held her sword up ready.
Ozma leapt into the air and held his spear towards her. As he thrust, Raven dashed forward and turned around, before she plunged her blade into his back once he landed.
Ozma just stood there as Raven pulled her sword out and backed away. "I might just have to." He said to himself, before he leapt into the air and called forth a beam of lighting which surged into his spear.
Raven already knew this trick, but Ozma didn't know she did. She leapt into the air just as he swung.
Ozma's eyes widened as she caught the lightning and reversed it, turning it back on him.
He landed on the ground and grit his teeth as the electricity burned his insides. Because of the lightning, he wasn't able to stop Raven from plunging her blade through his neck again.
As the lightning disappeared, Ozma lunged forward, Fushigiri outward. Raven ducked under his strike and ran her blade across his stomach, sending out yet another splash of blood.
Ozma gasped and fell to his knees, dropping the Fushigiri.
Raven flicked her sword clean of blood, before sheathing it. She turned around and picked up the Fushigiri.
"Good girl…" Ozma started. "You're strong enough now. You can face and end Salem." Ozma then sat back on his knees and placed his hands on them. "Now… do it!"
Raven held the Fushigiri over his neck as he put his head down to reveal it. Raven breathed deep before lifting it higher, and bringing it down to the ground.
Blood sprayed out of Ozma's neck. Raven pulled the Fushigiri away and watched as blood sprayed like a fountain out of Ozma.
"Raven… thank you…" Ozma said before he fell forward, and his head rolled off.
Raven nodded to his corpse, before she turned to face the castle across the canyon. She could already see the storm clearing above her, and the swarm of Grimm coming at her, now that Salem's last line of defence, Jaune, was dead.
Salem knew Raven held the Fushigiri, and she feared her. Raven smirked and ran to the edge of the canyon, and leapt off towards the Grimm, rearing her arm back and swinging the Fushigiri, sending out a wave of black flames.
