Another Patrick Rothfuss / Shane Tyree collaboration, the Modegan Deck comes from a far-flung piece of the Four Corners world. The Modegan Pairs variant game, Blackstone, is about as different as a Pairs variant can get. It's like playing chicken for money.
Game Rules: The back page of every Pairs rulebook will be different, with details on a variant that's exclusive to that deck. (The front page always has the basic rules.) The Modegan deck contains the rules to a gritty and aggressive gambling game called Blackstone.