Harry Potter and the Dark Lord Solution - Chapter 1 - the_sentient_duck - Harry Potter - J. K. Rowling [Archive of Our Own]
archiveofourown.org/works/65713672/chapters/169228813A botched ritual cast by a neo-Death Eater sends Harry, Hermione, and Ron back in time to the moment of Voldemort's resurrection. In the bodies of Voldemort, Bellatrix, and Lucius. It's time for fun and/or chaos to ensue.