Selfsame (A Harry Potter Twin Fic)

When the Light recruits by manipulation and the Dark are just straight-up bastards, it's up to one boy to fix everything... or so he tells himself. Elric Monroe thought he was a regular kid. Apparently not, as he finds out on his birthday. But sadly, wizardry isn't all ignoring the laws of nature. It also comes with a secret twin and a heaping helping of attempted filicide.