The closed appeasement of wizard society has caused wizards to face the severance of civilization due to the explosive development of human industrial civilization. The sub-age used the remaining three time turners to return to the era of Grindelwald, bringing warnings about the future and changing the direction of GGAD. Re-examining the relationship between wizards and Muggles will change the ideals and ambitions of Grindelwald and Dumbledore, as well as the direction of their emotional relationship.