The Magic: the Gathering (MTG) set Dragon's Maze (DGM) was released on May 3rd, 2013. It includes 2 token cards.
Dragon's Maze is an expansion set in the Return to Ravnica block. An expansion set in Magic: The Gathering is a pool of cards released together and designed for play in the same environment. Standard cards and tokens in a set can be obtained at random through booster packs. Sometimes a set will contain promo tokens that are given away as prizes at Friday Night Magic (FNM) or special pre-release events.