Okay I'm back from the drawing board!

The OP makes mention of magical weapons known as Arcs that are beyond expensive and desireable and what not. Does this mean the mere presence of magical ability is also extremely rare? Essentially, is magic a viable form of combat for a sin to practice? If this question is answered somewhere and I'm just an idiot who can't read right when he's tired, I apologize, and let me know so I can feel apropriately stupid.

[s]I may or may not be thinking of making the Sin of Sloth a wraith/spirit of some sort who's a super wizard. Better to ask before I end up writing a sheet for it.[/s]