A friend and I recently started a BW game where we each have a PC and we GM concurrently. Basically each of us is responsible for framing the conflict for the other's PC, and adjudicating the consequences of failed checks. The first session worked fined, and I'm hoping we'll come back to it soon.So what are your thoughts? What would be the challenges of this kind of game? What would be the rewards?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.