Can only be obtained in NG+ and further on.
- On the fifth floor of the library, in the area with four Grand Archives Scholars. The item is at the far end of the central bookshelves, where several Clawed Curses spawn.
- In the big courtyard past the roofs section, where Knight Albert, Kamui, and Kriemhild ambush the player.
- Down the stairs of the Great Belfry, in the central ruins immediately to the right.
Consume to acquire 50,000 souls.