The Shadow Professor of Hogwarts

[HP fanfic + Shadow Fruit + Defense Against the Dark Arts teacher. Develop fruit shadow magic mainly to create your own shadow kingdom. Karl, nobility and light. Graduated from Durmstrang and became the most outstanding graduate in the history of Durmstrang with his extraordinary shadow magic. Invited to become the umpteenth Professor of Defense Against the Dark Arts. As for the Defense Against the Dark Arts curse? I tied my backhand to Voldemort! Afterwards, Voldemort's soul was destroyed and his last words were heard: "He is a dark wizard, at least his magic is more disgusting than my Avatar."