It's usually canon characters who visit alternative universes, but this is different. Devlin is transported away from the Final Battle in his world into the Canon Timeline & lands in Albus Potter's first year. Of course, it doesn't help matters that Devlin looks like a Riddle or that he and Harry Potter are equally war-trained and ready to draw their ad "Part Two" First!
SEQUEL 'Voldemort decided not to kill me not because I was afraid or because my father would have done anything for my life, but because I looked just like him; he wanted to know what he would have been like, if he hadn't been raised by filthy muggles.' At Hogwarts, Devlin Potter plays a dangerous game, in the middle of a war, with a wizard most call a monster. Read "Part one" 1st
Voldemort and Harry Potter live on, and the 2nd wizarding war continues to rage. When the Dark Lord kidnaps Harry's son, he discovers a boy who looks less a Potter than a Riddle, raising questions about the parentage of the Muggleborn girl Harry married. Harry, reunited with the son he thought was dead, must face the fact that he is no longer the same boy. Like young Tom? Try this.
What would you do if your child was kidnapped and killed by Voldemort? What if 4yrs later you found out he was alive? What if your greatest enemy was claiming your child was his grandson? Welcome to Harry Potter's life. Extremely AU.