Shrouded in Shadows

AU Harrison Riddle is a genius in Potions and Transfiguration, but with his father being the Dark Lord Voldemort, having a sociopath for a twin brother, and his unhealthy obsession with experimentation, Harry expected to be isolated from the world for the rest of his life. However, that all changes when Lord Voldemort decides to send his two sons to Hogwarts as spies.