Love and War

(Apocrypha! Inspired by, but not an answer to, DZ2's 'Prodigal Son' challenge!) When his father came back from the dead, Harry learned he was a Homunculus decoy for the boy he was cloned from. Now, years later, alongside his mother, Harry Evans intends to take his revenge in the Great Holy Grail War...but will he die trying? Not if his foxy new Servant has anything to say about it!