Sealed for a Thousand Years from the Start, and My Brother Is a Gryffindor?

Chen Wu, an overworked corporate drone, dies unexpectedly and transmigrates to the Harry Potter world. The good news is, he's transmigrated. The bad news is, he arrives a thousand years in the past and becomes Godric Gryffindor's younger brother, Elaine Gryffindor. The Four Founders seal him on a remote island for a thousand years, turning him into a “living history book.” This isn't a punishment. To fight a hidden mastermind lurking in the shadows of the magical world, the Four Founders place all their hopes in Elaine. He slowly builds unfathomable magical power over the thousand years of his confinement, becoming the sole hope for the future. Now the seal has been lifted, and he finally sees daylight again, only to discover that the main Harry Potter story has already begun. But after a thousand years in confinement, his memories of the original plot have grown hazy. So how will the familiar events be turned upside down when the living younger brother of a Hogwarts Founder arrives in the modern wizarding world, bearing secrets from a thousand years ago and ancient, mighty magic? How will the ancient spirit of Gryffindor shine in this new age and fight the true threat that has lurked for a thousand years?