"Key to the giant cell below the Duke's Archives Tower.
The giant cell once imprisoned countless maidens, but is now empty, save for a few key persons. They struggle to uphold their sanity, as the horde of "mistakes" writhe at a fearfully close proximity."
The Duke's Archives Tower. Opens cell behind Pisacas. Free Big Hat Logan and a Fire Keeper Soul.
Found in chest at bottom of Archives, by the exit to the Crystal Cave.