How did we end up like this

Sierra is one of the magical creatures who can bend the earth and who were almost wiped out of existence. Then she comes to Hogwarts, where she becomes something between a student and a magical creature. After a while she meets Matthew and the rest of the Slytherins. After some time at Hogwarts, she begins to feel at home. With the knowledge and time to hone her bending skills, she is prepared for the things to come.