Gu Zhen Ren
Mentioning something obvious, that he has 500 years of experience and that not even that guy can compare in experience and that he's so awesome and experienced all the time, only serves to make him look like a idiot that pretends to be cool by flaunting the same thing over and over again. We're not retarded, we understood it the first time, we don't need to be reminded every chapter that he has 500 years of experience and that's why he's awesome and can do everything.