Blood Spirit

Source
This item is found when disenchanting weapons from Heart of Fear, Mogu'shan Vaults and Terrace of Endless Spring.

Additionally, they can be purchased for from  and  on the Isle of Thunder.

Blacksmithing

 * Bloodforged Warfists
 * Chestplate of Limitless Faith
 * Gauntlets of Battle Command
 * Gauntlets of Unbound Devotion
 * Ornate Battleplate of the Master
 * Unyielding Bloodplate

Leatherworking

 * Chestguard of Nemeses
 * Fists of Lightning
 * Liferuned Leather Gloves
 * Murderer's Gloves
 * Nightfire Robe
 * Raiment of Blood and Bone
 * Raven Lord's Gloves
 * Stormbreaker Chestguard

Tailoring

 * Imperial Silk Gloves
 * Legacy of the Emperor (robe)
 * Robe of Eternal Rule
 * Touch of the Light