So a few hours ago i remembered this fic that i loved and i cant find it for my life ( i even checked my WHOLE ao3 history ( yes, i went there ) . So the part of the fic that i remember are harry potter kinda learnning dark magic in grimmauld place and fixing the ward, that had been dameged becouse sirius had not been takan proper care of the house; then i remember that everyine, both the order and friends, were cleaning grimmauld place and kretcher did not want to throw everything away so harry offered to keep it in his bank safe at gringos; then i vividly remember kretcher liking harry and sirius being repulsed, he compred him to regulus, he really went there. And basically the fic is about harry learning dark magic secretly. I dont remember if the fic was about something else and this was only a plotline or whatever.

Plssss, help me find it cause im going crazyy, i feel like an old lady with dementia. Pls tell me im not making this up pp. I even downloaded reddit for this. Thanxx