Looking for a fic !!

Hi there’s a fic I read a while ago I can only remember certain details like how Nicholas flamel and harry made a deal to see if he could figure out his identity after returning the philosophers stone and how Harry once was rendered unconscious and Blaise and someone else had to contact a potioneer for ingredients and Neville ended up polyjuiced as Harry and yells at dumbledore !? Some nights where Harry visits knockturn and has a hag as a friend ? ps think it might be a tomarry ? Pls if u find this fic lmk 😊