Vodouisant's Vigilant Embrace

Vodouisant's Vigilant Embrace is used on leg and head armor to permanently increase intellect and spell power.

Source
Vodouisant's Vigilant Embrace is a quest reward from the quest Vodouisant's Vigilant Embrace (quest) which starts with Zanza the Restless in Zul'Gurub. To complete the quest, you must turn the following items to Zanza the Restless:
 * 1 Primal Hakkari Idol
 * 1 Punctured Voodoo Doll (shaman)