Primal Mana

Primal Mana is an elemental item used for many professions.

Source
Primal Mana is made by combining 10 Motes of Mana, see that article on how to obtain them.

Primal Mana can also be created through Alchemy with the Transmute: Primal Fire to Mana recipe.

As an ingredient
Primal Mana is used in the creation of the following items:

Alchemy

 * Mercurial Stone
 * Primal Might
 * Major Arcane Protection Potion
 * Primal Fire
 * Cauldron of Major Arcane Protection

Blacksmithing

 * Fireguard
 * Khorium Belt
 * Khorium Pants
 * Helm of the Stalwart Defender
 * Khorium Boots
 * Bulwark of Kings
 * Deep Thunder
 * Mooncleaver
 * Twisting Nether Plate Shirt

Enchanting

 * PvP Power (enchant)
 * Major Spellpower (gloves enchant)

Engineering

 * Super Sapper Charge
 * Foreman's Enchanted Helmet

Jewelcrafting

 * Pendant of the Null Rune
 * Ring of Arcane Shielding
 * Arcane Khorium Band
 * Circlet of Arcane Might
 * Figurine - Talasite Owl

Leatherworking

 * Magister's Armor Kit
 * Netherfury Belt
 * Netherfury Leggings
 * Arcane Armor Kit
 * Enchanted Clefthoof Boots
 * Enchanted Clefthoof Gloves
 * Enchanted Clefthoof Leggings
 * Enchanted Felscale Boots
 * Enchanted Felscale Gloves
 * Enchanted Felscale Leggings
 * Netherfury Boots
 * Earthen Netherscale Boots
 * Living Dragonscale Helm
 * Netherdrake Gloves
 * Netherdrake Helm
 * Windscale Hood
 * Netherstrike Belt
 * Netherstrike Bracers
 * Netherstrike Breastplate

Tailoring

 * Spellcloth
 * Mystic Spellthread
 * Runic Spellthread
 * Cloak of Arcane Evasion
 * Cloak of the Black Void
 * Black Belt of Knowledge
 * Manaweave Cloak
 * Bracers of Nimble Thought
 * Mantle of Nimble Thought
 * Primal Mooncloth Robe