The basics of KeyForge are that that there is no deckbuilding – every “booster” is a unique constructed deck, completely ready to play (minus needed tokens). The decks are generated via an algorithm that results in approximately 1 septilliion possible decks (that is a lot of zeroes) – the algorithm also has balance rules built in and things such as some cards only show up together. The decks have unique backs, so they can’t ever get mixed up with any other decks. Not sold yet? Maybe this video will change your mind.