The base Chachapoya game is expanded by a new obtainable but dangerous God of Sand cards. We should shuffle the YAYAUCHA promo cards into the treasure deck, after it prepare the other card as it's written in the game rules. In case of 2 players playing discard 20 randomly choosen cards. If 3 are playing discard 15 cards and if 4 players, discard 10 cards and put them back into the box without looking at them. These cards are not used in this game. Follow the original game rules. Enjoy playing the game and have fun with treasure hunting! —description from the designer