What does Xia Dongqing mean by tarot cards?

In episode 17, this woman divined Xia Dongqing with tarot cards and divined three cards: Tower, Devil and Victim. What's the point? Xia Dongqing is the victim, and Xia Dongqing's sister is an evil ghost. Zhao Li married his sister to Xia Dongqing when he was five years old. From then on, Xia Dongqing can see it. In fact, Xia Dongqing's sister is not simple. His sister has the ability to destroy the world. ...