Lesser Eternal Essence

Lesser Eternal Essence is a magical essence of the Eternal plane used in enchanting. Three lesser eternal essences may be combined to form one Greater Eternal Essence.

Source
This essence is obtained by disenchanting level 51 to 55 items. Usually more from weapons than from armor.

Enchanting

 * Enchanted Leather
 * Enchant Bracer - Greater Intellect
 * Enchant Cloak - Greater Resistance
 * Enchant Bracer - Superior Spirit
 * Enchant Gloves - Greater Agility
 * Enchant Boots - Spirit