Libram of Rapidity

With some work you can turn in the Libram of Rapidity to Lorekeeper Lydros to receive an Arcanum of Rapidity, which will permanently add 10 haste rating to a leg or head slot item.

Required Materials

 * 1x Libram of Rapidity
 * 1x Pristine Black Diamond
 * 2x Large Brilliant Shard
 * 2x Blood of Heroes

Source
Drops from the northern and eastern wing of Dire Maul.