Part of the Beastmaster Armor set:

The set gives these bonuses as more pieces are worn: 2: +8 All Resistances. 3: Restores 8 mana per 5 sec. 4: Your melee and ranged autoattacks have a 5% chance to energize you for 200 mana. 5: When struck in combat has a 8% chance to remove a Root effect from yourself. Can only occur once every 60 sec. 6: +40 Attack Power. Set Details | All Sets

Quest Reward from:

Level	Name	Start	Rewards
60	Saving the Best for Last  (Dungeon) Horde and Alliance Ironforge	Deliana Ironforge	1650 XP
60	Saving the Best for Last  (Dungeon) Horde and Alliance Orgrimmar	Mokvar Orgrimmar	1650 XP

Disenchants into

Name	Value	Drop%
Nexus Crystal	1 Copper	100.0%