A play deck may be enhanced as a player wishes but each player must adhere to the following provisos.
- There must be at least 55 cards.
- There must be the same number of Time cards and each player must have an equal number of the three types of Time card denoted by their frame colours.
- There must be at least three The Watcher cards with a minimum of one Past The Watcher card, one Present The Watcher card and one Future The Watcher card.
- There cannot be more than four identical cards in the deck.
- The sum of the solve numbers from each Episode cards included in a play deck must not exceed 25.