Harry Potter: the Dark Master

Harry's cousin, Dudley Dursley, follows the protagonist in his adventures in the magical world. However, the magical world contains not only Voldemort, but also dangers from a hundred thousand years ago. They are ancient and powerful. Then a war breaks out, an unparalleled magical war! This war affects the entire magical world, tragic! Acura! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.