Severus Snape was perfectly happy with his life. Sure, working for the Dark Lord was horrific, his home was a hovel, and his personal relationships non-existent. Yes, he definitely was happy. That is, he was, until an unexpected visit from an alternate universe self turned everything on it's head. Surely there was no universe in which he had adopted Harry Potter?

Or:

Harry Potter finds the family he always longed for. Sometimes salvation comes from the strangest places.

Challenge: " Mirror Mirror" Cannon Snape comes face to face with a version of himself from another universe. A universe where he raised Harry Potter.