Awakening of the Ancestral Dragon

Aria is ten and lives outside the Magus family, which threw her out when she was three along with her mother. The Magus rule is blood: a dragon's line is pure or it is nothing, and Aria's father was a dragon and her mother a human, so the family calls her a mongrel and says her draconic blood will never wake. Her grandfather Augustus signed the expulsion. Her mother spent the years after it on the streets, cold and hungry, and got sick. What the family does not know is that Aria is the Primordial Dragon returned. An infant body could not hold that much power, so she put a seal on herself and set it for seven years. The seven years are up and the seal is coming apart. She goes back to the Magus castle to collect from the people who signed her out of it.