Essence of Water

Essence of Water is an elemental building block of many crafting recipes. It adds the virtues of storms and power to any item.

Source
This item drops from water elementals and can be fished from Patches of Elemental Water.

This item can also be crafted using Alchemy (275); taught by Recipe: Transmute Earth to Water or Recipe: Transmute Undeath to Water.

or

Alchemy

 * Transmute: Water to Air
 * Transmute: Water to Undeath

Blacksmithing

 * Dawnbringer Shoulders
 * Enchanted Thorium Breastplate
 * Enchanted Thorium Leggings
 * Frostguard
 * Storm Gauntlets

Enchanting

 * Argent Versatility
 * Frost Power
 * Enchant Weapon - Healing Power
 * Enchant Weapon - Icy Chill

Engineering

 * Hyper-Radiant Flame Reflector

Leatherworking

 * Dawn Treaders
 * Frostsaber Boots
 * Frostsaber Gloves
 * Frostsaber Leggings
 * Frostsaber Tunic

Tailoring

 * Belt of the Archmage
 * Robe of the Archmage
 * Robe of Winter Night
 * Frostweave Gloves
 * Frostweave Pants