AU Harry is abused by the Dursleys. he hopes to be able to save himself somewhat through the use of potions since underage magic isn't allowed, so starting 4th year he will try much harder to get good at potions. Will Snape help or sabotage him? Set after PoA - Snape as mentor - no slash - Abusive Dursleys - No Triwizard tournament and Horcruxes are not a thing. COMPLETE