The tarot cards can be used in spell work and other types of magical castings as a representation. They are not just limited to divination work or throwing/reading the cards. One can use a pentacle card in a spell to represent the pentacle if they do not have any other representation of it. You can also use a card to help in a magical working that has the same goal as what that card represents. Such as in a love spell one might use the lovers card or in a spell to bring about change one would use the death card or wheel of fortune. One could also use the emperor or empress cards to represent a specific person they are casting for. The possibilities are endless.