Team RWBY X Male Grimm Hunter clan member

Their was once a clan of Argonians that appeared on remnant after they helped defeat molag bal and stopped him from taking over tameriel. When they arrived on Remnant they were attacked by Grimm almost instantly. But they managed to fight back and went into hiding. After a month of hiding in the mountains in vale they discovered why the Grimm attacked them. When they appeared in Remnant their mana was mutated and became black as the night sky. Because of this they attracted Grimm left and right. But they learned how to fight back. They discovered dust and found new ways to us it with their mana to enhance the power of their spells. They saw how much of a plight the Grimm were on the planet so they decided to fight and protect the people. They called themselves the Grimm hunter clan. They were very powerful and very dangerous. But after so many centuries of constant battle their numbers dwindled from the thousands to a single clan member after they were attacked by the white fang for not Joining them. Now as the last of his kind on Remnant Draco the heir to the Grimm hunter clan must use all of his power to avenge his clan and stop the evil witch Salem. But he can't do it alone no matter how powerful he is. But he will have team RWBY to aid him in his fight.(I got the idea for this story from RWBY the immortal guardian. So if you can please read the book.)