"Spellcasting" is all through the bible anon, prayer and spellcasting are the exact same thing. The pureness of heart vs. greed ratio is what makes it one or the other.
The pureness of intent. I mean, the writing has to be good too, knowing the true meanings of words, the vibrations of the sounds, the specifity of thought. Well enough written, even the most evil can be made to do good things and vice versa.
Anon wrote a pretty damn good spell anon, admit it.