Back in the Nineties as a Spiritual Medium

Li and the old priest told Le Yi to stop dwelling on which sect or school the person who hurt her belonged to. Le Yi was single-mindedly bent on revenge and firmly believed that understanding the enemy was most important. But then her master said, "You'll inherit my legacy one day. If you can send someone flying with a wave of your hand, why would you need to know where they came from?" Le Yi opened her mouth, then closed it again. What kind of sect had she joined? Was it really that powerful, or were they just good at bragging?