Unique and Common are designations of the unit drafting classifications. In Heroscape, these two classifications determine the drafting regulations of characters. If it is Unique, the player can only draft one unit of that kind.. If it is Common, then the player can draft as many of that character as point cost limits allow. Uncommon is a joint classification of the two, they operate entirely as unique units with the exception that a player can draft as many as them as they would like.