In Lord of Mysteries, Tarot Cards begin as ordinary illustrated cards that Klein Moretti employs for divination, thrown defense, and as calling cards, distinct from the more powerful Blasphemy Cards. Across the series, these cards evolve from simple tools into symbolic markers of Klein's growing influence and the Tarot Club's identity, reflecting his transition from a cautious outsider to a central figure in the mystical world. Their utility expands from personal use to serving as emblems of the secret organization he founds, underscoring his strategic use of mysticism and identity.

In Lord of Mysteries, Tarot Cards begin as ordinary illustrated cards that Klein Moretti employs for divination, thrown defense, and as calling cards, distinct from the more powerful Blasphemy Cards. Across the series, these cards evolve from simple tools into symbolic markers of Klein's growing influence and the Tarot Club's identity, reflecting his transition from a cautious outsider to a central figure in the mystical world. Their utility expands from personal use to serving as emblems of the secret organization he founds, underscoring his strategic use of mysticism and identity.