Kill it with Magic

Sixteen-year-old Lillim Callina is good at two things: running away and magic. Now, Lillim's half-demon ex-boyfriend is contacting her for help, she has somehow gotten herself mixed up in a kidnapping, and her long-dead rival has risen from the grave. So when a dragon plotting to take over the world offers her a choice: Work for him or else. Lillim Callina is going to choose else.