Primal Spirit

Primal Spirit is used to buy trade goods from Ashley Zerep and "Appraiser" Sazsel Stickyfingers.

Source

Primal Spirit can drop from elite Draenor mobs. It can also be looted via gathering resources and mission rewards.

Patch 6.1.0 (2015-02-24): Now stacks to 1000, up from 200.
Hotfix (2014-12-18): Primal Spirits should now be dropping more frequently while harvesting mineral and herb nodes outside of the Garrison, from Skinning, and in a satchel obtained by completing the daily Fishing quest from the Garrison Fishing Shack.
Hotfix (2014-12-09): Primal Spirit is now only eligible for Greed rolls in Need Before Greed loot mode.
Hotfix (2014-11-17): Changed from rare to uncommon quality.
Patch 6.0.2 (2014-10-14): Added.

Air	[Elemental Air] [Breath of Wind] [Essence of Air]

Earth	[Elemental Earth] [Core of Earth] [Essence of Earth]

Fire	[Elemental Fire] [Heart of Fire] [Essence of Fire]

Life^†	[Heart of the Wild] [Living Essence]

Water	[Elemental Water] [Globe of Water] [Essence of Water]

Undeath^†	[Ichor of Undeath] [Essence of Undeath]

Motes	[Mote of Air] [Mote of Earth] [Mote of Fire] [Mote of Life]^† [Mote of Mana]^† [Mote of Shadow]^† [Mote of Water]

Primal	[Primal Air] [Primal Earth] [Primal Fire] [Primal Life]^† [Primal Mana]^† [Primal Shadow]^† [Primal Water] [Primal Might]^†

Crystallized	[Crystallized Air] [Crystallized Earth] [Crystallized Fire] [Crystallized Life]^† [Crystallized Shadow]^† [Crystallized Water]

Eternal	[Eternal Air] [Eternal Earth] [Eternal Fire] [Eternal Life]^† [Eternal Shadow]^† [Eternal Water]

Rousing	[Rousing Air] [Rousing Decay]^† [Rousing Earth] [Rousing Fire] [Rousing Frost] [Rousing Ire] [Rousing Order]^†

Awakened	[Awakened Air] [Awakened Decay]^† [Awakened Earth] [Awakened Fire] [Awakened Frost] [Awakened Ire] [Awakened Order]^†