Part of the Dreamwalker Raiment set:

The set gives these bonuses as more pieces are worn: 2: Your Rejuvenation ticks have a chance to restore 60 mana, 8 energy, or 2 rage to your target. 4: Reduces the mana cost of your Healing Touch, Regrowth, Rejuvenation, and Tranquility spells by 3%. 6: Your initial cast and Regrowth ticks will increase the maximum health of your target by up to 50, stacking up to 7 times. 8: On Healing Touch critical hits, you regain 30% of the mana cost of the spell. Set Details | All Sets

Disenchants into

Name	Value	Drop%
Nexus Crystal	1 Copper	100.0%