Changeling the Remnant

Chapter 1: Failure

A long time ago, before even Dust and Grimm, a demon wished to take our planet for his own. His very presence caused earthquakes and natural disasters, and he desired to enslave every creature that somehow survived his arrival. His daughter stood against him, sacrificing herself to protect her four friends, feeling they were the only hope for the world. One went to find her, while the other three had an incredibly difficult mission: they had to distract the demon.

In a desire to find amusement in the mortals, the demon brought their shadows to life and they had to fight the worst opponents they had ever had: themselves. Their shadows spoke to them, bringing insecurities and rage to the surface, until they realized how to truly win. They couldn't fight themselves, but they could defeat each other.

After a grueling death match that tested their limits, the original three were left, barely standing and exhausted. The demon was growing impatient, cursing the cockroaches before him and their stubbornness. He stood from his throne, a strange building that had been their home, and summoned a club from the hellish realm he called home.

As if on cue, the two returned, the demon's daughter cloaked in pure white as she stared down the beast that was her father. Summoning forth the demonic energy she was born with, now a pure white instead of black as it had been, she launched him into the atmosphere. He crashed against the moon, shattering a part of it completely. Due to the shrapnel entering his body, he let loose several pained coughs, his demonic blood falling to Earth in great pools of crimson, before the body he had sent to this realm began to become ash, his energies fading and being forced back to the razed dimension he was imprisoned in.

Animals and humans alike returned from the stone prison their skin had transformed into at the sheer presence of the demon, their memories shattered from the experience. The five, having not been stone, were disintegrated by the sheer energy, wiped away with naught but more ash spread across the world.

Curious animals drank from the demon's blood, and began to change. They became the first Grimm, and eventually their taint spread to those around them, becoming more and more powerful and violent until they were unrecognizable.

The demon's ash, and that of the heroes, spread through the land, sinking into the ground and becoming Dust. It is said that these heroes, somehow, lived on through their ashes, the abilities they used and words they lived by becoming imprinted into the minds of those who were surrounded by it.

From the leader, they learned that melee weapons could be used against the Grimm, as well as hand to hand combat, and the idea that teamwork of powerful individuals were the best bet against the beasts they fight, which eventually became the Hunters.

From the second in command, a man of metal, they learned ranged weapons could work well in tandem with their melee weapons, as well as the ability to create technological wonders and use Dust bullets. They were taught that the proper technology could aid in any situation, and that you must give more than one hundred percent to prove your strength.

From the princess of another world, Semblances were born, great strengths that enhanced the body of Hunters trained in its use. Speed, Strength, and Aura all came from her. Through her they were taught the power of allies and friends, as well as emotions.

From the demon's daughter, Aura was strengthened and could be used on its own mixed with Dust to form a type of fighting that used no weapon, sometimes called Magic. It had a Semblance of its own, but anyone could train themselves to use it. They were taught of the pains of betrayal and loneliness through her, not to mention the ideology that you must control your emotions, lest they control you.

And, arguably the most important, was only known as the Master of Beasts. People were taught to embrace their instincts and follow the teachings of animals from his Dust, and eventually they evolved to form the first Faunus. He taught them of discrimination, and how everyone is equal no matter what some might say. He also taught that anyone could be a leader if the situation called for it, but sometimes it was better to follow.

As the world and its people evolved, forming communities to better defend the innocent from the Grimm, the story was forgotten, the five forgotten…

All but the Master of Beasts.

The Faunus looked to his teachings as they faced constant discrimination, forming the White Fang as a group to hold peaceful rallies and protests to show they weren't less human than anyone else. But things took a dark turn when the leadership of the White Fang changed, and the group became more warlike and brutal, hating humans just as equally as they were despised.

The White Fang eventually became hated by even the Faunus, feeling they were going against the teachings that they had evolved into. But they felt otherwise. They twisted the lesson to fit their purposes, saying that the Master of Beasts hated humans and that they should do the same. Sadly, it worked.

It is said that they have begun believing their own falsehood, and are trying to find a way to revive the Master of Beasts, and to have him help lay siege on humanity, allowing the Faunus to become the master race of the planet…

"Are you sure this is wise? We don't know if this will even work." One nervous mook of the White Fang asked, looking at the pile of Wind Dust, green crystals with power over air, that they had… borrowed from the higher ups and centered amidst a massive alchemical circle with worry behind his Grimm-like mask.

"Trust me, this is gonna work great. We'll be heroes to our people, and finally get the respect we deserve." The second mook responded proudly, finishing the lines along the floor of the Emerald Forest. The circle had a pentagram inside of it, with Wind Dust and all the minerals that make up a human piled up in the center.

"But what about equivalent exchange? To create Ice Dust one needs to fuse Wind and Water, but what's equivalent to a soul?" The first asked, nervously looking around the clearing for any signs of Grimm. None yet, but this much Dust, and the power they'd be kicking up would have them swarming their position shortly.

"I dunno, but it should be fine. The story says he became Dust, right? That means the Dust should bring him back." He didn't seem to realize how insane that sounded, since he summoned his aura and began pushing it through the lines of Dust, which began glowing brightly. As it connected with the pile of minerals and Dust, the glow blinded them both.

A huge burst of energy attracted the attention of every Ursa, Nevermore, Beowulf, Boarbatusk, and Death Stalker in the forest as the two White Fang members were replaced in the clearing, by a very strange human.

He had light green skin, dark green hair, a single fang sticking out of his mouth, pointy ears, and wore a purple and black jumpsuit with a silver belt.

With a gasp, he opened deep emerald green eyes and looked around the unfamiliar area, his instincts going nuts as the earth shook beneath him.

Beast Boy of the Teen Titans was born once again, and he was in danger.

Wow, I'm kinda on a roll! Sorry about another new story out of left field, but I thought of it when I realized there wasn't an explanation of why the moon is so screwed in RWBY. Of course, that led me to "How can I get BB involved in this mess?" and it just came to me. I hope you like it, and yes, I implemented the idea of Alchemy from FullMetal Alchemist as Dust Alchemy, because why not. Let me know if you want me to continue this!