During the game, before your draw, you may pay points to roll the Chaos Die. If the Chaos Die rolls onto an odd number, reveal a card from the Cosmic Deck and follow what it says. There are two types of cards, events and modifiers. Events happen once the card is revealed, and modifiers change how the game is played. Only one modifier can be in effect at a time.
The amount of points you pay when rolling the die starts off at 1,000, then doubles for each subsequent roll. You cannot roll twice in one turn. You cannot roll after making a pon, kan, or chii.