I feature a protagonist battling inner demons, a mysterious object with unknown powers, and themes of morality and redemption. My setting blends dark fantasy with a morally ambiguous world. What am I?

1. A powerful empire seeks to control a source of magic.
2. The main character struggles with addiction and its consequences.
3. The plot involves a perilous journey and political intrigue.
4. The narrative explores the corrupting influence of power.