• Righteous Weapon Coating
• Item Level 70Disenchants into:
  Not disenchantable
• Requires Level 70
• Use: While applied to target weapon, wielder has a chance to gain 300 attack power on every melee or ranged attack for 10 sec. Only functions on the Isle of Quel'Danas, on the Magisters' Terrace, and on the Sunwell Plateau. Lasts for 1 hour.
• 5 Charges
• Sell Price: 15
• Cooldown: 1 Second

Source

This item is a quest reward from  [70 Daily] Ata'mal Armaments.

Patch changes

• Patch 2.4.0 (25-Mar-2008): Added. 
  

External links

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB