The differences between self-sacrifice (which hurts you) and regular "sacrifice" (which does not).
Teach Them Fear: The concept of a character so powerful and unassailable that even the Big Baddies (wizards, demons, undead, you name it) are afraid of him. Basically answering the question: "What are the monsters in my closet afraid of?"
Morality, Law, Justice. The evolution of power structures.
On the more person-centric side: Depression, despair, anger/hatred/rage, and the effect of music on the emotions. (Also music as magic).
Teach Them Fear: The concept of a character so powerful and unassailable that even the Big Baddies (wizards, demons, undead, you name it) are afraid of him. Basically answering the question: "What are the monsters in my closet afraid of?"
Morality, Law, Justice. The evolution of power structures.
On the more person-centric side: Depression, despair, anger/hatred/rage, and the effect of music on the emotions. (Also music as magic).