The World. The key concept for this card is a mark or cross that has equal arms. A cross is sometimes used in place of a signature. Therefore, it takes on this meaning also. The symbology here is cosmic consciousness, which is the final seal of the great work here represented. At this point, we have gained control over ourselves and our environment. Right decisions are now natural, and the One Power becomes the central reality in our lives. Saturn rules key 21. The Saturn center at the base of the spine, called the sacral plexus, is a storehouse of excess energy left from each day's activities. Saturn has been considered a malefic; however, it can help build for the future if one uses the energies in the sacral plexus for constructive action.Tarot cards came long after the playing cards deck, in 15th century. While playing cards were used in games, Tarot were designed for Psychic readings only. Each Tarot card tells a story about you and your future and past. When you are reading tarot cards, you are connecting with universe on a deep, psychic level, where shadows fall in the dark.