I agree with RedPanda, this concept is like, knifegun awesome, man!
HELL YES
Back to business, I was wondering, does every PC need to be a witch? Truth be told, I'm currently testing out a character type. The picture above is actually sorta relevant; he's an 'avenger' type, much like ol' Punisher. To put it simply, he wants to kill the witches sent to Daten City, starting from the strongest ones.
@Katzenbach Hm . . . Interesting. Though only witches (both dormant and active) are sent to Daten City. Still, that is an interesting idea. PM me with the details of this and we'll see if we can work something out.