God-Level Grandpa

When I read the novel, I felt that the protagonist's portable grandfather was very cool, but he was just a guide for the protagonist. A few more people remember how powerful they once were. ——————————————————————————————————————————————This book starts with the protagonist growing up and training a lot of protagonists to serve as the guide of the mysterious big boss on the lost journey. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.