Spirit Medium? No, a Phantom Spirit Medium

I came up with this book on a whim. It's a sequel to Classroom of the Elite: The Fun Classroom Where Might Makes Right. It's purely for entertainment, so don't take it seriously. The author is terrible at coming up with names, so this book may borrow a lot of names from elsewhere, along with some of the settings. Yang Shi: Dustsong Pot and Thunderfire Sword Shangqi: Platinum War Dragon Xilan: Mermaid Illusion Flute West: Myriad Transformation Cube Heimu: Netherworld Knight Kayuna: Guardian Thorns