The author of "Ghost of Privet Drive" (which is indeed all kinds of fun) recced this one in the latest chapter's AN, and I promptly binged it.
Well worth the time.
https://archiveofourown.org/works/237029...s/56911591
"That Universe Over There" -- Master of Death Harry Potter finds himself in another universe and promptly decides to fuck the rails of canon. He moves to adopt his young counterpart and give her a happy childhood, pre-emptively deal with as much of Moldyshorts as he can, get Sirius free, and generally get it right this time.
And so young Ivy Potter is off to Hogwarts, gets sorted into Slytherin, and promptly proceeds to be utterly adorifying.
Well worth the time.
https://archiveofourown.org/works/237029...s/56911591
"That Universe Over There" -- Master of Death Harry Potter finds himself in another universe and promptly decides to fuck the rails of canon. He moves to adopt his young counterpart and give her a happy childhood, pre-emptively deal with as much of Moldyshorts as he can, get Sirius free, and generally get it right this time.
And so young Ivy Potter is off to Hogwarts, gets sorted into Slytherin, and promptly proceeds to be utterly adorifying.