Arkham Ritual: Mystery Card Promo (2017)

You may wish to use Mystery Card instead of one of the 4 Great Old One cards included in the game. If you choose to play with the Mystery Card, take all 4 Great Old One cards and set them aside separate from the normal deck of cards.

Mystery Card is exactly the same as other Great Old One cards. The round ends immediately if a Gate card is discarded, and a player is holding a Mystery Card in their hand. Skip the normal End of a Round and resolve the Mystery Card’s effect instead.

Mystery Card’s effect:

Take the 4 Great Old One cards set aside. Shuffle them face down and reveal one of the cards. Resolve the effect of the revealed Great Old One card.