Libram of Focus

Turn in a Libram of Focus to Lorekeeper Lydros to receive an Arcanum of Focus, which permanently adds (to a leg or head slot item) +8 spellpower.

Required Materials

 * 1x Libram of Focus
 * 1x Pristine Black Diamond
 * 4x Large Brilliant Shard
 * 2x Skin of Shadow

Source
Drops from the western and eastern wings of Dire Maul.