Item No Longer Drops. Was used by the Blacksmith to craft pieces of the set, Captain Crimsons Trimmings.
This item was changed to longer drop in Patch 2.0.6. This item now sells for 50,000 gold to a vendor.
Drops from various Dune Thresher rare spawn monsters. Known spawn locations listed below.
Can also be found on Moontooth DeadShark, who drops the rare Murlocket amulet that summons a Murloc. You can view a guide for farming him and the item here. It is recommended to farm him if you are also looking for a Murlocket.
The following video shows one of the unique monsters that drops this item. Note: The monster does not have a 100% chance to appear and it may take a few tries to find it.
In Patch 2.0.4 (4-08-2014) Blizzard stated the drop rates for Legendary crafting materials have been changed to match the drop rates for Death's Breath. Those rates are:
While the drop rates for Legendary crafting mats do scale with difficulty, their scaling is independent of the Legendary drop rate bonus slider in Torment 1-6.
Strangely, sand sharks find this essence irresistible.