Libram of Constitution

The Libram of Constitution is one of several items required to complete the Libram of Constitution quest. The reward for the quest is a Lesser Arcanum of Constitution, which will permanently adds 100 health points to a leg or head slot item.

Required Materials

 * 1x Libram of Constitution
 * 1x Black Diamond
 * 1x Lung Juice Cocktail
 * 4x Night Dragon's Breath

Source
Drops off level 48 to 58 humanoids.