Hey everyone ! And welcome to my first ever fanfiction,

It won't be the best or the worst ever (I hope) but I've been absorbing RWBY crossover fanfiction like a drug addict for the past 3 month that I went why not try ?

I can't stress this enough BUT I am not the bester writer ever so every critisism to better myself will be greatly appreciate !

My grammar might be lacking in some area since this is not my maternal language (I'm French) but I will try my best !

But enough about little ol'me and let's just into the first chapter of Flame of Faith,

Disclaimer : RWBY is the proprety of Rooster Teeth and Warhammer is the proprety of Game Workshop I do not own anything !

Chapter 1

It was a bright sunny day for the little 5-year-old Ruby Rose. Her dad had dropped off her big sister Yang at one of her friend's house that morning, and she was enjoying some quality time with the best dad ever, making the best thing ever – cookies!

At the moment, she was watching them bake with a bright smile on her face. The aroma of the chocolate chips was already making her tummy rumble, while her dad, Tai Xiao Long, was reading her favorite story about a knight saving the princess from the big bad Grimm. It was the best day ever for little Ruby Rose.

But everything was about to change when they heard knocking on the door. Her dad stopped reading and looked towards the door. -Knock Knock- The knocking came back a bit harder, and she looked at her dad with youthful curiosity, tilting her head. "Is it Uncle Qrow, Daddy?" Tai glanced at her, his eyes filled with worry, before placing her down on the ground. -KNOCK KNOCK- The sound came back, making her jump from the force of the strike. She saw her dad grit his teeth before kissing her on the forehead. "Honey, you're gonna have to be a brave girl, okay?" She nodded, not knowing what he meant, but when her dad got all serious, it always meant bad things.

He smiled at her, but before he could say anything, a loud crash made her scream in fright. Her dad turned around and shouted a single word, "RUN!" while pointing at the backdoor in the kitchen. Like the good girl she was, she ran as fast as her little feet could carry her. Behind her, the sounds of battle and screams could be heard.

Little Ruby Rose ran through the forest around her house without looking back, crying all the way for her daddy to be safe. She dared to look behind her, and all she could do was scream. A man, a Faunus by the look of his scorpion tail, was running after her, a manic smile on his face. Further behind him, her home was on fire, where she could hear the distant sounds of gunfire and shouts. So Ruby ran even faster, her vision blurred by the tears in her eyes, but the adrenaline and her panicked beating heart kept her going.

But sadly, the Brother Gods seemed against her on this fateful day. She could hear the crazed laughter of the Faunus chasing her, rapidly gaining on her. With a glance behind her, she tripped hard, and with a cry of pain from her sprained ankle, she tumbled and rolled... until her back hit the bark of a tree hard, pushing all the air out of her little lungs. Now she was crying hard in pain and terror, like any child would, but no sound came out.

Before her vision could right itself, something grabbed her by her shirt and lifted her into the air. The only thing she heard was laughter. "Oh my! Oh my! It seems like the little Rose had an 'incident,' hmm? Oh, you are so lucky that I got here before the Grimm, little girl." Even the man's voice sounded wrong.

She tried to wiggle weakly in his grip, but the man just smiled at her, leveling her with his eye. "Why, now, this is not the way to thank your savior, little Rose! But don't worry, my goddess has such grand plans for you! You should feel honored to have caught her interest!" Now she was trembling like a leaf and replied weakly but with conviction, "M-my daddy w-will kick your butt b-before...!" His only reply was to laugh even harder and caress her left cheek with his stinger. "You amuse me. Sadly, your precious daddy is already dea-!" Ruby blinked the tears away, hearing the man stop his rambling. The pain in her ankle reduced to a dull throb, thanks to the adrenaline. But when she looked at him, his gaze seemed not to be on her but behind her. She tried to wiggle in his grip to see, and what she saw made her eyes widen in horror and wonderment.

A massive swirling vortex was right behind her. She could discern things, but at the same time, not. Snarling faces that looked like malformed Grimm out of nightmares, their colors shifting between green, red, purple, and blue. They were all battling each other, yet not. Ruby didn't know what she was looking at, but her eyes widened even more at what came out of it.

A giant leg.

A giant leg clad in what seemed like massive green armor with black joints at the ankle. The leg was followed by a hand, just as massive and clad in the same green armor. The being inside seems to be trying to exit the portal as fast as possible. Then another arm of the same design emerged, grabbing the edge of the portal. With some force, the being exited the portal, which closed with a wail, like a creature losing its prey. All she could think when looking at it was awe and wonder. Forgotten were the Faunus holding her in the air, forgotten were the pains in her ankle and back, or her home burning. The giant robot stood before her, massive in size at around 8 feet and 5 inches tall (2.59 meters). His armor was a dark green, scorched with scratches, burn marks, and bullet holes, as if he had come out of a fight with Grimm and Huntsmen alike. His chest depicted a skull adorned with wings made of what looked like gold, in the finest art she'd ever seen. His legs were clad in the same armor as his torso, green but black at the ankles, with flame decals around the boots. His waist was adorned with what looked like the hide of some sort of lizard, black as night. The armor on his arms bore the most damage, as if he had tried to protect himself with them. She could even see some bullet holes in them. His pauldrons were massive, with one painted black with flame decals and a weird red symbol that looked like a chain. The other pauldron had pieces of paper who where hold by what look like red wax on it,the pauldron itself was carved with a magnificent roaring dragon head, challenging some unseen foe. The being's helmet was white, with what looked like a crown of golden laurel at the top. The lens of the helmet were of a deep red like, reminiscent of the Grimm. On his back, there was a white backpack, black in color, with two skulls on handles at the top and a broken lamp with three metallic arms sticking out of it. One arm looked like it had a saw at the end, another a pincer, and the last one a weird contraption that looked like a gun, with a faint red glow inside. Strapped to one of his arms was a massive drill, and on his left hip was a bulky sword with the same insignia as his armor. She could see teeth sticking out of it and what looked like a trigger on it – maybe a mechshift weapon? On his right hip was what looked like a gun, but no gun held by a person had a right to be this big and beautiful. It was black in design with golden text written on it. All in all, this being looked beautiful and really cool in her opinion.

The giant was holding his head with one hand before shaking it has if trying to clear a headache once done he then began looking around him. His gaze seemed to freeze at the view in front of him his gaze directed on her.

Before the Arrival

On the surface of a world that seemed lush with greenery, anyone observing from space might have thought that this world was peaceful. However, a fierce battle was raging between the Space Marine Chapter of the Salamander and an Eldar force.

Aboard a Thunderhawk, a squad of Salamanders was reciting their last prayers to the Emperor or paying respect to their weapons to appease the machine spirits inside. The vox of the ship crackled to life, and the pilot's voice could be heard, "Touchdown ETA 1 minute, Brothers. You are ordered to reinforce the position of Brother Sergeant Varresh's squad. They are currently pinned by Wraithguards, a Viper, and multiple squads of Dire Avengers. Be advised, a Psyker has been spotted among them. The Emperor protect, Brothers!" The vox went silent as the squad shouted, "The Emperor Protect! For Vulkan!"

As they cried out for the Emperor, the Thunderhawk's doors opened. The Salamanders wasted no time and jumped out of the craft. Eldar shots were already whizzing past their heads or grazing their armor. They ran in the direction of Sergeant Varresh, and along the way, their flamer specialist was hit in the head and dropped instantly. The apothecary of the group glanced mournfully at his fallen brother, vowing to the Emperor that he would return for his gene-seed. The rest of the squad returned fire without stopping, their Bolter shots resonating through the trees amid the cries of pain from the wretched Xenos.

After what felt like hours of running through the dense forest, but was in reality only a few minutes, the three-man squad burst through the foliage, surprising a group of Avengers.

One of the Eldar turned around and pointed at them, screaming something before having his face crushed by the mighty power fist of the venerable squad leader. He was sent hurtling into one of his unlucky brethren. The two surviving Eldar raised their weapons, their shots chipping at his armor. The apothecary and the last tactical marine of the squad raised their bolters and fired with deadly accuracy, killing the two instantly. The last Eldar was on the ground, begging for mercy. He sounded really young, but none would be given to the Xenos. An armored boot ended his life by crushing his head.

The three space marines glanced at each other before arriving at their objective – a reinforced bunker where two of their brothers were holding the line. A third marine was slouched against the barricade, missing an arm. The apothecary could see the remains of the fourth marine, or what was left of him – surely having been hit directly by the enemy Viper multiple times. He sped up, crouched next to the wounded marine, and began administering first aid. With the reinforcements, the noise around him intensified, but all his focus was on the wounded marine. Drowning out the sounds, the only thing that broke his concentration was broken by the shout of Brother Hareus, the tactical marine of his squad. He screamed, "VIPER!" at the top of his lungs before having his head vaporized by what looked like a shot from a Wraithguard.

His patient stabilized, and with a glance above the barricade, he could see the Viper speeding through the trees with extreme speed. Grabbing his bolter from his hip and taking a calming breath, he fired two shots, hitting the driver and gunner of the craft. The Viper crashed through trees, even into some of its own, much to his satisfaction. But this satisfaction was short-lived when something harshly impacted his pauldron, jolting him to the side before he quickly ducked behind the barricade.

"Brother Adal! Focus on collecting the gene-seed of Hareus. We WILL not leave any of our own behind!" This was the baritone voice of his squad leader. Without questioning the order, enemy shots still hammering their position, he ran toward the fallen marine, protecting himself with his arms. An enemy round dented his armor, but thanks to the covering fire of the other marine two, he was able to reach the corpse and drag it to cover. Without wasting a moment, he began the surgery.

So focused on his task, he did not notice his squad leader disappearing with a blood-curdling scream in an ethereal fire. He was left behind, witnessing the wounded marine he was sent to protect being killed by the last Wraithguard of the Xenos. The surgery lasted a few minutes, but when he raised his head, the number of combat-ready space marines had dwindled from four to only two. A pang of grief surged through him at not seeing his squad leader. At the same moment, Avengers started pouring in from atop the bunker's barricade, and without thinking, he started punching and hacking with his great drill at them. He fought back-to-back with Sergeant Varresh. They seemed to be winning for a moment, until he heard a meaty thunk behind him and a grunt of pain.

Spinning around, Adal could see an Eldar different from the others. Her weapon was a long, beautifully engraved bone spear. She was draped in a robe the color of midnight, with wraithbone armor that gave her a ghastly appearance. Her spear was currently embedded in Varresh's throat, the great man weakly grabbing at it before his arm fell to his side, never to move again. The Eldar Seer snarled as she removed her spear from his throat the corpse falling like a fortress wall crumbling,she then turned her focus on him with her eyes filled with hatred. "Foolish Mon-keigh! You thought that such primitive beings could invade one of our remaining worlds? Your dying Emperor should be ashamed of—" Adal did not let her finish. The other Eldar around them gasped in surprise at how fast he moved. Even if her yelp of surprise and pain was anything to go by, without a word, Adal punched his drill through her stomach, the sound of the machinery making her scream even worse. In her panic, the Eldar's eyes sparkled with unrestrained power, her fear for her life evident. The only sound she heard was the voice of the man in front of her, filled with disgust and hate. "If I am to die here, you will die with me, Witch." His second hand moved faster than lightning, squeezing her throat. But in her last desperate attempt to remove him from her, the warp exploded around them, and in the blink of an eye, the dead Eldar and Aldar disappeared from the glade they were standing upon, leaving behind horrified and shocked Eldar.

In the Warp

Nothing was making sense for Aldar. His eyes were screwed shut, but he could still see faces of snarling beasts. He could feel scratches being inflicted on his armor. The corpse of the witch had been quickly removed from him by purple demons wearing very little. Their teeth were already sinking into her flesh. He lost his perception of time, and in this moment, the only thing he did was pray to the Emperor and his Primarch, asking for forgiveness as he believed he had failed in his duty to protect his Brothers. Time passed, both fast and slow. His resolve was tested. But then, a bright light filled him with warmth and a feeling of safety. The snarling faces and voices that promised power howled in agony before disappearing.

Without moving, he felt himself being dragged toward the light, the feeling only growing stronger. A voice, full of power and comfort, spoke, "Open your eyes, child of Vulkan, for I have a task for you." Without hesitation, Aldar opened his eyes. The light surrounded him, shielding him from the warp's chaotic influence. In front of him, a portal, similar to a rift, was open, revealing a forest beyond. However, what truly captured his attention was the sight of a little girl huddled against a tree, crying in pain and terror. She must have been barely five years old. His breath caught in his throat; no child so young should wear such an expression of fear and agony on their face.

But what made him pause even more was the man – no, the mutant – approaching the girl. He looked like a predator who had finally caught its prey. Licking his lips with his scorpion tail flicking in delight behind him, the scene filled Aldar with a burning rage. No child should be chased by such a monstrous creature. And again, the divine but gentle voice spoke to him, "Save her and guard her at all cost, protect this world, my champion." Without second-guessing, Aldar walked forward, guided by the voice, saying one last thing before he stepped through the portal, "Kill Salem,the girl is the key to your victory."

Sooooo what did ya think ?

It's not much but it my first chapter ever and from here well I can only hope to progress ! If by some miracle a writer god happen to stumble upon this jumble of word and like to help write it I'd be forever gratefull (money kinda thight this past few month can't pay you most sorry), again if you have any review or advice for me I'll take them eagerly for now thanks for the read and I'll see you in the next chapter !

Krieg out.