Letter Duel

Letter Duel's deck has 50 cards which each have 4 letter pairs on it, e.g. SI AE OL UR, or DE EL EP PO. The deck is dealt out evenly into face-down piles for each player, except for 2 cards face-up in the center. In each round players race to find 4-letter words made from a letter pair on each of the center cards, e.g. RULE or POOL or SIDE from the cards above. The first to find and call out a valid word gets to place one of their cards atop one of the center cards, starting the next round. The first player to get rid of all their cards and then call out another valid word wins the game.