Simply the worst system ever invented, solely to keep the protagonist from progressing at all in 30 chapters. The guy is useless with a power he can't even control on his own, literally an automatic plot armor.
The author made this awful system even worse just to avoid giving him the Hero's power, only to keep him as a character with zero progression and maintain this "I'm weak, useless, but I have companions by my side" mentality. I hate protagonists who can't evolve while everyone else can.