You go to a gem store to give your friend Carol a gift. The saleswoman helps you choose and you buy an obscure crystal. You go home and wait for Carol. Hours pass and Carol arrives, you give her the gift and she thanks you then she starts acting strange, her eyes turn red and a Machiavellian smile appears on her face, she looks at me and says "Thank you very much, thanks to you I have finally able to regain my powers and to reward you, you will become my husband."