This promo comes in the Polish version of Teotihuacan. It is used in Scenario 4 (Volcano Island). As a part of the setup phase place this mini expansion on the volcano tile. During the first 3 rounds you can use explore action on this tile - only 1 action per round allowed. If successful, choose one of the three awards: resolve two Mystery Cards (draw only treasure chests), increase weapon level by 2, draw 2 Starting Items. Then put a black marker on this tile, it's no longer available. At the beginning of round 4 remove this tile from the game.