"Chess is a very old and widely-played game involving a number of pieces defined to have different abilities and characteristics," Castle explains. "The pieces are king, queen, rook, bishop, knight, and pawn. The kind of magic I practice involves setting up metaphors in which spell participants are represented by various chess pieces. I'm very strongly a rook, also known as a castle, hence the nickname; Royal's strongest pieces are king and queen, though she can take knight in a pinch. The setup spell here is a pawn promotion, which references a move in chess where a pawn, normally the weakest piece, can be transformed into a queen, knight, rook, or bishop. I'm going to represent Vampire Two as a pawn in the spell and then ask the magic to show me which of those four he has strong associations with. But it can be helpful to have an idea ahead of time."