"This is the board." Janet takes a step back and holds her hands out in two Ls, like she's framing the board for a photograph. "The squares turn into whatever I want. I'm pretty sure I can do all the transmutation myself, although the metal might be a bit tricky. There are two teams, and they each try to capture all the squares. It's all with spells -- no physical violence." Emphasis on the fact that the violence simply has to not be physical.