What do you think of this?

Sixteen year old Wizard/demon hybrid. Foster child who runs away. Learned some basic magic from local practitioners.

I want the young wizard to struggle with the desire for power and the need to use it and his demon's urges.

The vampires try to eat him. The fear awakens his demon. He burns one vampire to death. This offends the local vampire lord. A wizard senses the conflict and moves in the help the young wizard.

He protects a were which drags him into the group's politics.

His mentor who saved him from the vampire attack begins teaching him about magic and encourages him to control his demon.

If you want me to explain a bit more just ask.