Both players pick a deck and spread out their cards face-up in front of themselves. Place the extra deck in the middle of the table and have players draw a card from it, keeping their card a secret in their hand. Try to figure out which Harry Potter character your opponent has in their hand by taking turns asking each other yes or no questions. Flip the cards in front of you face down as you discover which characters it cant be. At the start of your turn, you can guess the card in your opponents hand. If you choose correctly, you win! Be careful, because a wrong guess is an automatic win for your opponent.