First attempt, so don't be too hard on me. I think this is going to be a simple one-shot. I don't own anything.
The Nevermore screeched and flung its feathers down on its attackers. The spearlike projectiles zip straight towards Ruby, who was currently focusing her mind elsewhere. Just as they were about to impale the girl, fire dust sped towards the feathers. The dust exploded, changing the trajectory of the feathers and making them miss their intended target.
Weiss sighed a breathe of relief. "I know she said to cover her, but what is she doing?" muttered the heiress as she watched her partner run towards Blake. The two of them stood there discussing for moments before the ninja girl ran off and Ruby comes back to Weiss.
"Care to enlighten me on this plan now?" questioned Weiss as Ruby got closer.
"We're going to beat this bird." stated Ruby proudly.
"And how do you propose we do that?"
"Well, we can use Blake's weapon and those two pillars over there as a slingshot to fire at the Nevermore."
"And what do you propose we fire at the beast?"
"Me." Weiss stared dumbfounded at her partner's response. 'Is this dolt actually insane!? Wait, calm down Weiss, she probably has an explanation.' Weiss regained her composure and allowed Ruby to elaborate.
"I'll get fired from the slingshot which might give me enough momentum to slice the bird's head clean off."
'Just go along with it Weiss, she's going to be your partner for the next four years. Just play along.' Weiss exhaled and then asked. "What do you need me to do?"
"For a clean shot, we need to get the Nevermore over to this cliff. Then keep it still long enough to get the slingshot ready."
"I should be able to do the second part with some ice dust. Though the first part, not so much." Weiss considered ways to get the beast closer to the cliff. 'I could try to draw its attention towards me somehow, but how am I going to do that?' While still deep in thought, Ruby taps on the Weiss' shoulder.
"I think my sister has that covered." Ruby pointed towards the blonde brawler as she fired rounds at the bird. All the shots seem to be shrugged off by the great Grimm. Then, by a stroke of luck, one shot landed in the Nevermore's eye. The bird screeched turning to its assailant and charged. Weiss saw the girl jump from her perch as well as the Nevermore as it opened its beak.
'She's going to get devoured!' Just then, the heiress noticed the blonde holding the monster's beak open firing shots into its throat. The assault distracted the bird, causing it to barrel forward into the cliff. Right before the collision Yang flipped from the Grimm's beak and landed smoothly on the ground.
Ruby watched the scene go down and called out. "Good job sis. Now Weiss it's your turn."
Yang paused, trying to get a hold of the situation. The brawler saw her sister standing in between two ruined columns and her partner standing on one of the pillars. Weiss, who was quickly rushing towards Yang, quickly yelled "Ruby. Slingshot." Yang nodded, and she ran past Weiss. Weiss saw that the bird was barely shaken from the impact with the cliff. It screeched as it was about to take off into the skies once again. Weiss frantically activated the ice dust and catching some of the Nevermore's tail feathers.
'This should hold it down for long enough.' Weiss used a glyph to jump back and then retreated towards the rest of the huntresses-in-training. Blake and Yang had set up the slingshot from Blake's Kurasami
Weiss placed a glyph at her feet and jumped back. Then she ran to where Ruby was positioned. Blake and Yang had set up the slingshot and Ruby shot herself so her scythe sat snug in. Weiss setup a glyph which held the slingshot taunt and ready to fire.
"Of course, you would come up with this idea." commented Weiss.
"Think you can make the shot?" challenged Ruby.
"Hmph, Can I?" smirked Weiss. 'This will be a piece of cake'
Ruby blinded and turned towards Weiss worried. "Can't-"
"Of course I can!" yelled Weiss . 'Does she even know what sarcasm is?'
With a smirk, Ruby turned towards the bird and reloaded her scythe.
Seconds before Weiss was about to release the glyph, she stopped. She looked at the red hooded girl to her side ready to decapitate a Nevermore. 'Can I really make this shot?'
The heiress shook her head casting the thought aside. 'I can do this.' Once again focused on the task at hand, heiress twirled Myrtenaster and the black glyph that was holding the hooded girl down shifted red. Ruby had simultaneously fired her rifle and activated her semblance causing her to fly at the Grimm, leaving a storm of rose petals in her wake.
And then everything when horribly wrong.
The ice cracked and with a simple lunge, the Nevermore broke free charging at Ruby.
Ruby saw as the bird charged towards her. Desperate to get out of the way, Ruby angled her scythe to shoot above her, trying to get underneath the bird. Weiss saw what was happening at once and fired a glyph underneath Ruby to use as a step.
Ruby fired her scythe again in attempt to strike the Nevermore once again. However, the Nevermore was faster and ready for the young huntress. The beast countered the assault by lowered its beak at the young huntress in aim to pierce through her.
Ruby, not anticipating the Nevermore's actions, desperately tried to guard with her scythe, but the bird's beak was already too close to the girl. She used her aura as a last resort in defending from the blow, but to no avail. The Nevermore stabbed the girl clean through the stomach.
Blood gushed from the newly made wound. The girl gasped, releasing Crescent Rose as she struggled to push the bird's beak out of her body.
Weiss watched in horror with the headmaster's words echoing through her mind. Do no hesitate to destroy everything in your path, or you will die.
"RUUUUUBBBY!" Yang screamed at the top of her lungs at the sight of her sister being impaled. The brawler's eyes blazed red and with a burst from her gauntlets she rushed towards the beast that dared to harm her sister. "I'LL KILL YOU!"
Yang bashed the Grimm into the side of the cliff. The injured girl slid from the monster's beak and fell. Enraged, Yang began to sent a flurry of punches at the Nevermore's skull. The repeated blows started to give way and the Nevermore's mask shattered. But the brawler continued to punch at the beast. Blood splashed the surroundings as Yang continued to maul the disintegrating Nevermore.
Breathing heavy, Yang landed on a part of the ruins watching as what was left of the Nevermore's husk slowly disintegrate. "Eat that you monster!" growled Yang.
Released from her rage, Yang remembered her sister. "Ruby! Where is she?!" the huntress frantically looked for her dear sister.
Blake approached Yang with solemn eyes. "I'm sorry Yang, but after you freed her, she fell down there." Blake pointed at the misty gloomy below. "We tried to reach her, but we didn't make it. I'm sorry."
Yang stood there, eyes wide as she took in the information. "Y-You're kidding, right?" She was answered by the black and white pair lowered their heads.
Yang began to laugh. Slowly and quietly at first, only to get louder and faster until she began to laugh out hysterically. She collapsed, trying to make sense of what happened. "Y-You're saying she's gone? My baby sister is gone?"
"Yang" began Blake soothingly.
"Cut the crap!" Yang grabbed Blake and shoved her to a nearby pillar. Tears staining her face. "She was only fifteen. FIFTEEN! She had her entire life ahead of her and you're telling me she's GONE!?"
"Yang, calm down." begged Weiss.
"Calm down?!" Yang jerked her head towards the heiress. "How can I calm down, when my sister just got attacked?" Yang released the faunus girl and approached the edge of the ruins. "I'm going after her."
With those words, Yang jumped.
Blake ran towards the edge and threw her Gambol Shroud down. The weapon shot down and wrapped around the brawler's waist and arms. Holding her suspended in midair.
"LET ME GO!" screamed Yang. She thrashed against the ribbon, desperately trying to free herself from its bindings. "I HAVE TO SAVE MY SISTER!"
Blake pulled the ribbon up throwing Yang back on solid ground.
"You idiot! If you had went down there, you would have died!" scolded the heiress.
"Shut up, let me go!" Yang continued to flail around. "My sister is down there injured, how could I not try and save her!"
"Yang, you need to calm down. If you go down there you're only asking for death." reasoned Blake.
"No, I need to go down there!" shouted Yang. "I need to go down there." Yang quieted down as tears rolled down her face. "My baby sister needs me. I need to save her."
"I know Yang, but there isn't anything we can do. There are monsters down there that would rip us to shreds. We need more experienced hunters to go down there."
"O-okay." accepted Yang. Blake untied the blonde and helped her get up. "Now let's go get some reinforcements."
Blake and Yang went through the ruin opening located at the base of the cliff. Weiss looked around her, recalling the events that has just transpired. 'I hesitated. And it got one of us killed. What have I done.'
As she lamented over her failure, she saw her partner's scythe laying on the ground. The huntress quickly grabbed it and followed the pair that had went before her. Looking back at the battlefield Weiss thought. 'I'm sorry Ruby. It's my fault that this happened. I'll find you.'