Faction powers (which ended up being cards instead of play mats) were an Add on, but provided free to the LE backers.
The Faction Power Cards (12) – US MSRP $7.99 -- SKU # 101877 These 12 cards detail a unique power that each faction in the game can selectively employ. When using these Faction Powers, the players can either: 1) draft these (one per player) in reverse starting order (last player selects first); or 2) blind draw their Power. The designer recommends option #1. (Included in The Limited Edition)