Once players reach at least 20% favour, they may speak to Horphis, who seeks dark manuscripts. Each dark manuscript given will give players 3% favour with the Arceuus House and a book of arcane knowledge. The location of the manuscripts vary between players, but the locations of books only vary between worlds and reset after 80-100 minutes. Players should speak to Biblia on the top floor for help in finding various texts around the library, as she tells you the floor level and the section of the floor where a requested book is located.