[@Happy Go Lucky] So essentially a mage catboy with half a demon heart, engaging in his very first mission when everything goes horribly wrong? :D  I could see some plottish chaos here.

I'm hesitant because it seems you've got a very detailed world, magic mechanic, and character backstory made up. As a mod this makes me wary. I have to know and trust that if I say something happens that directly conflicts with your character ideas (if a spell goes wrong or the half-demon heart becomes a plot point) it will not be questioned and I won't be forced to adhere to your novel's canon. This will likely never come up at all in-game, but it's the kind of thing that should be clarified from the getgo, just in case.

If you agree to allow me free reign on plot and mechanic even if it directly conflicts with your novel, then you're approved. :)  Otherwise, you might want to consider creating a character specifically for this RP, one who is flexible to the whims of the plot.