Hi. With the addition of public housing games, I think that you could make pvp-ing at castles public. It could be like regular pvp, where you could set which levels can join. Maybe you could be able to set which schools or ranks could join, if Treasure Cards can be used, if spectators can come, and maybe even be able to set special rules, like in tournaments. There could be a stand in the Arena that displays all public matches, and one in the houses where you can set the rules. Unlike regular pvp, you aren't sorted into teams, and you can decide that when you get there. Another thing, maybe you could make place-able duel circles (Though it'd be pretty hard finding a spot to fit one since they're so big)
