A/N: I don't own RWBY it belongs to Rooster Teeth. As well as Fusion parts as well. Got the fusion idea from an RWBY AMV video called Stronger than you AMV (Rose-Xiao Long Family) by Raven Xiao Long on YouTube. The song is Stronger than you from the show Steven Universe. So I like to point out that I don't own Steven Universe either. Also * are for thinking. Enjoy

A five-year-old Yang was dragging a wagon with Ruby in it. Yang looked at her sister and saw the bracelet with the rose shape ruby gem on it. Yang remembered the day Ruby found that ruby gem it was a month before Summer left on the last mission that she would ever go on. Summer took the gem and made it into a bracelet for Ruby and as soon as Ruby put it on, the ruby changed its shape into a rose. If you wanted to be more precise you would say that it looked like Summer's crest known as Scatter no one knew why that happened but Ruby loved it, and never took it off. Anyways Yang finally made it to the building where she wanted to go only to see Beowolves coming out of the building.

Ruby at that moment woke up and saw the Beowolves coming towards them. She was so scared that she reached out her hand towards Yang and grabbed her sister's hand. Only for the gem on her wrist to glow which made Yang look at Ruby. "What the...?!"

At that moment the light engulfed them. When the light was gone, the two girls were gone and there stood only one girl. The girl was about the same height as Yang. With Yang's pigtails, but instead of being blond she had black hair. The lilac eyes weren't there either instead they were silver. The close was a mix of the two. "What the? What just happened?"

Just then Qrow got there and killed the Beowolves and look down only to see some girl that looked like a mix of his two nieces. "What the? Who are you?"

The girl looked up in confusion. "It's me, Yang... No, it's me, Ruby! What the?! Uncle Qrow what happened to us?!"

At that moment Qrow's eye's widened. "What the dust?! I think you two somehow fused together! But how?"

"I don't know? One moment we were holding each other's hand and then the bracelet started to glow and..."

Qrow put up a hand. "Wait? You mean the bracelet with that ruby gem that Ruby found that Summer made a bracelet with?"

"Yeah."

Qrow thought about it for a moment. "Okay try this think of yourself as being two people again."

The girl did as she was told and the girl was gone and Ruby and Yang were back as themselves. "Okay good, glad that worked. Now ruby maybe it would be best if I took the bracelet for now."

"No! That was cool! Do it again! Again!"

Qrow placed a hand on his head. *Oh boy. I don't think I'm ever going to get that bracelet away from her now.*

"Alright let not do that and just go home okay?"

Ruby pouted but gave in. "Okay."

Qrow picked them up and put them into the wagon and started to take them home.

...

Years later the two were both going to Signal Academy and both have made their weapons and are wearing the clothes that they wear in valium 1-3. That is because this was Yang's last year at Signal and also unknowingly Ruby's as well. The two were home alone working on their weapons when Ruby looked at Yang. "Hey, Yang?"

Yang looked at her. "Yeah, Ruby what is it?"

"Do you remember back when we were kids that day we fused together?"

Yang nodded her head. "Yeah, I remember that. I also remember both Dad and Uncle Qrow tried to take the bracelet away from you but you wouldn't ever take it off. And when they tried to take it off in your sleep it would shock them so they stopped trying at some point. Why do you ask?"

"Well, I was wondering if you want to try fuse again?"

At hearing that Yang got a little worried. "I don't know... When that happened the first time... it was scary."

"Oh come on Yang think about it, we both have our own weapons and our own semblance just thinks about what would happen this time when we fuse. Maybe we would be able to share our semblance's and our weapon's as well as maybe when we are together there is either a third weapon, semblance or both."

At hearing that got Yang. "Well... I guess it wouldn't hurt to try it now, after all this time. Besides, we know how to undo it so I guess it is safe to do. So... I'm in."

Ruby gave out a wide smile. "Alright! Let's go outside and give it a go!"

And with that, the two went outside.

...

Ruby jumped up. "Alright, let's do this!"

Yang only smiled at Ruby's reaction and extend a hand to Ruby. Which as Ruby saw that she grabbed it with her own. As soon as she did the two thought about becoming one again and light that the two saw when they were little came back and the two fused. The women that were now standing was Yang's height and had Yang's hair style but Ruby's black hair color. Yang and Ruby's outfits were mix up in an ugly way again. And the women's eyes were silver. "Okay...? Let's see what we can do."

The women decided to do weapons first and summed Ember Celica and started to do same of Yang's moves with a mix of Ruby's. "Wow! I can't believe I can use Ember Celica like that! This is so cool!"

The women smiled. "Okay, I get it sis now lets try your's."

The woman then summoned Crescent Rose and started to do Ruby's moves with Yang's in the mix. "Okay, I can see why you and Uncle Qrow like scythes so much."

"I know right! Now let's see if we have a third weapon. At that moment they were able to summon a set of ninja yo-yos for each wrist. The Ninja yo-yo blades looked like the same blades as Crescent Rose. But instead of one blade for each Ninja yo-yo, it had 8 blades and somewhat looked like a flower. What attached the Ninja yo-yos to her wrist looked a little like Ember Celica but smaller and the bullets didn't look like the once that Yang uses but more like the ones that Ruby uses. "Ninja yo-yos huh? Well, let see what they can do."

The woman through one of the yo-yos around the woman kept at it for a while and find out that they could set on fire and yes the bullets were the kind Ruby uses but its power level was a mix of the two girls bullets. As soon as she was done. The woman tried to do Ruby and Yang's semblances. Which it turned out that the woman could use both but there wasn't a third semblance. "Okay so we have three weapons together and only two semblances, I can live with that."

The woman then looked at her outfit. "But what I can't live with is our outfit!"

"I know right! Why can't we be in all black and red?!"

Just then Yang thought of the outfit her with mom wore in the Team STRQ pitcher and the Woman outfit change into that. The woman stood their shock for a moment before speaking up. "There is no way we are wearing this!...What but Why?... My birth mom wore this back when Team STRQ was still students at Beacon. For all we know she is still wearing it. Scratch that she got to be wearing this since Dad and Uncle Qrow are still wearing the same thing as they did back then. We don't need people thinking were her!... Or her twin sister."

"Okay, then let's go in and think of what we want to look like then. And now Yang I don't want to wear an outfit that shows the girls."

"Okay fine, but we will at least have our stomach showing."

"Deal."

Just then the Woman's stomach was showing, and the woman went inside and looked at a full body length mirror. "I wonder do you think we could keep the black hair and also have red and blonde highlights?"

Just then at the ends of the ends of woman's hair, along with her bangs got blonde and red highlights that made it look like it was on fire. "Ooh, I like that how about our top is a long sleeve shirt."

The top was a plain black long sleeve shirt. "Okay, how about we also wear black cargo pants, with a red and yellow side skirt that looks like it is on fire."

The woman was now wearing black cargo pants with a red and yellow side skirt over the right leg that looked like it was on fire. "Ooh, nice pick Ruby. We can have a phoenix on the left side on the shirt."

On the left side of the blacktop near where the woman's stomach showing the phoenix tail was showing the bird looked graceful all the way to the top where its head was on the left shoulder of the woman. At that moment Ruby thought of something. "That's it I know what we can call ourself when we fuse!"

The woman arched an eyebrow. "Oh really? And what might that be?"

The woman smiled. "Shadow Phoenix, Phoenix for short."

The Yang hath in the Woman thought about it for a moment before nodding her head. "I like that, Shadow Phoenix it is then."

At that moment Tai and Qrow got home. "Girls were home!"

At that moment Phoenix walked up to them. "Hey Dad, Uncle Qrow."

Tai's eyes widened. "What the dust?!"

But Qrow groaned at seeing Shadow Phoenix. "Oh no not again."

"What do you mean again?! Why is Raven calling me dad and you Uncle Qrow?!"

Qrow gave him a deadpan look. "Tai remember about that time I told you about Yang and Ruby somehow fused together?"

At hearing that Tai gave out a look of revelation. "Oh so the two just refused is all."

"Yeah, Tai, they did. But I would like to know why as well as why they look a whole lot better than last time?"

Shadow Phoenix rubbed the back of her head. "Well, you see Ruby wanted to see if I could use both Yang's and her semblances and weapon's which that is true. As well if I have my own weapon and semblance which is only true for the weapon part. So I can use two semblances and three weapons."

The two men nodded their heads at that. When the woman standing in front of them smiled. "Oh, and when the two of us are fused we want to be known as Shadow Phoenix, Phoenix for short."

Qrow really and I mean really wanted to take a drink from his flask but thought that now wasn't a good time. Also, he thought of something at that moment. "Phoenix you said you tested to see what you can do right?"

Phoenix nodded her head and Qrow smirked. "Well, then let's see how strong you are. You vs Tai and me, what do you say?"

Phoenix smiled widely. "Yeah, lets do this!"

And with that Phoenix used Ruby's semblance and ran outside. The two men looked at each other for a moment. "Qrow what did you get us into?"

"Sorry, Tai but we got to know how powerful they are when they are Shadow Phoenix."

At hearing that Tai sighed. "Your right lets get this over with."

And with that, the two men went outside.