Talk:Suspicious Marble/@comment-28621946-20161202175413

Does anyone know how many of each can spawn in a world. Twice I have seen two of the same head, and I have once seen a set piece with 2 bishops and a knight, and one with just 2 knights instead of 1 of each. I know they are non-renewable and only spawn at world gen, but can someone help me figure our how they spawn?