Diablo 4 Season 10: Blood on Parchment Walkthrough In Diablo 4 Season 10: Season of Diablo 4 Items the Infernal Reign, players continue to uncover the legacy of Bartuc and Horazon - two of Sanctuary's most infamous sorcerers. Once you've reached Reputation Rank 6, you'll unlock the Blood on Parchment quest, one of the most pivotal storylines in the season. This quest bridges the gap between...