Three Times The Trouble

They were separated, for reasons unknown, and cast into different universes, never meant to know who they are, with Harry meant to be manipulated his entire life, L dying an untimely death and Loki being turned dark by abuse and loneliness. What if two had their gifts unbound? What if one was not disguised as Jotun? Harry Poter/Death Note/Avengers Crossover. Intentionally OOC.