C250 Wretched Gu

The old man shook his head. "I can teach you, but I can teach you. It is more or less different from the power of this plane he is showing. You should learn from him honestly first. You can ask me if there's anything you don't know. After all, such a long time has passed. I'm not sure if the rules of this world are the same as when I was in the past..