Comment by TomMorfinRiddle on [Spoilers] How did Voldemort learn the horcrux spell? · 2021-04-22T12:48:49.019Z · LW · GW

He learned it from the Baskilisk in the chamber of secrets, I believe, as Professor Quirell mentions it, that is the way he learned Horcrux, and how he built the second level version.