Daughter-of-hades Stories

One day, a strange kid called Nico di Angelo arrives at her school and she finds out that she's a demigod. Nico brings her to Camp Half-Blood. She gets claimed by Hades. Hades had broken the oath. Zeus and Poseidon insist that Hades can't have two demigod children and decides that one must die. Hades managed to convince them to send his children on a quest, to prove their worth. Will they make it back? Will anybody die?

A mix between Harry Potter and The Vampire Diaries.