Libram of Voracity

Libram of Voracity is a book which, with some effort, can be turned in to Mathredis Firestar to receive a Lesser Arcanum of Voracity, which will permanently add 8 Agility, Intellect, Spirit, Strength or Stamina to a leg or head slot item.

Required materials

 * 1x Libram of Voracity
 * 1x Black Diamond
 * 4x Crystal Force
 * 4x Whipper Root Tuber
 * 30 gold

Source
Dropped by level 42-55 humanoids.