I see... I get this more now! Thanks for the detail. 

I definitely don't want to interfere with your juicy plot. I want it to be a surprise! :^) Hmm, I was imagining that magic is incredibly powerful in this world... but it comes at a cost. Perhaps internal change in the user? Tainting them? Maybe magic is drawn from their darkest emotions and if abused, corrupts them from the inside and out? It would be fun to have that internal dynamic as he makes choices. Only a few can use it, but those who do are tasked with a grave duty or something. Can there be a band of these users who combat this evil? 'Knights' perhaps? I want to develop a strong theme of friendship. 

Of course, after the main character goes through the introduction.